Tuesday
May 21, 2013

# Homework Help: Math

Branches of Math

math
776÷ (1/4 + 1/5)
Friday, May 3, 2013 at 3:16pm

Math
19. Point A(4, 2) is translated according to the rule (x, y) (x + 1, y – 5) and then reflected across the y-axis. a) In which quadrant of the coordinate plane is point A located? b) What are the coordinates of translated point A’? In which quadrant of the coordinate ...
Friday, May 3, 2013 at 2:19pm

MATH
a purse contains \$1.35 in quarters nickels and dimes There are 3 times as many dimes as quarters and 3 more nickels than quarters. find the number of each coin
Friday, May 3, 2013 at 1:24pm

math
Twenty-three coins are tossed; in how many ways can you have at least two tails?
Friday, May 3, 2013 at 1:08pm

math
A box contains blue and white ribbons. If five ribbons are choosen at random, how many ways can at least 1 blue ribbon be selected?
Friday, May 3, 2013 at 12:53pm

math
find the amount due on a \$300 invoice recieved on june 3 and paid on june 11 if the sales terms are 3/15, n/30
Friday, May 3, 2013 at 12:29pm

math
Find the general solution of cos2x + 3 sin x =2
Friday, May 3, 2013 at 12:04pm

math
show that 1-sin x/cosx + cosx/1-sin x = 2 sec x
Friday, May 3, 2013 at 12:00pm

,math
show that sec theta(cosec theta) - cot theta = tan theta
Friday, May 3, 2013 at 11:58am

Math (Trigonometry)
Given that sin 53∘ = T, how many values of N, subject to 0 ≤ N ≤ 1000 are there, such that sin N∘ = T?
Friday, May 3, 2013 at 11:44am

math
what is the ratio 7.5 to 3.25 in lowest term?
Friday, May 3, 2013 at 11:06am

math
differentiate. y=2^(5x) my ans is y'=2^(5x)5 ln 2. is it correct?
Friday, May 3, 2013 at 11:06am

Math (Algebra)
How many distinct rational numbers can be expressed in the form a/b, where a and b are integers such that 1 ≤ a < b ≤10?
Friday, May 3, 2013 at 11:01am

math
A Cold Stone Creamery ice cream shop sells sundaes for \$3.60 and banana splits for \$4.25. The shop sells four times as many sundaes as banana splits. If total sales amounted to \$3,730 last weekend, how many banana splits were sold?
Friday, May 3, 2013 at 10:42am

math
Which angle measure less than or equal to 360° is equivalent to an angle of .1`7`ª`\$.?
Friday, May 3, 2013 at 10:37am

math
The train slows down uniformly from a speed of 50m/s to a speed of 10m/s in a time of 20sec,During the next 30sec,it accelerates uniformly to a speed of u metres/sec.calculate the retardation from t=0 to t=20?
Friday, May 3, 2013 at 10:21am

math
the energy bar kyle is eating has 37 grams of carbohydrates.how many calories are from carbohydrates in the energy bar
Friday, May 3, 2013 at 9:39am

math
A ladder 10 m long rests on horizontal ground and leans against a vertical wall. The foot of the ladder is pulled away from the wall at 2 m/s. How fast is the top sliding down the wall when the foot of the ladder is 6m from the wall?
Friday, May 3, 2013 at 8:35am

math
Some books give the following rule of thumb for finding the standard deviation of a normally distributed variable: s= range/6. Explain why this rule works.
Friday, May 3, 2013 at 7:38am

math
As θ ranges over all real values, what is the maximum value of (14sinθ+5cosθ)^2
Friday, May 3, 2013 at 4:50am

math
You are driving a car and the speed is an exponentialy distributed random variable with mean 50 (in miles per hour). The speed limit is 60 miles per hour, and if your speed is x > 60 miles per hour, the probability you are stopped by the police is 1 - e^(6-(10/x)), and if ...
Friday, May 3, 2013 at 3:54am

math
It is known that the number of people who enter a bank during a time interval of t minutes is a Poisson random variable with the parameter t. The bank opens at 8am and you arrive at the bank at uniformly random time between 8am and 9am. Let X be the number of people who ...
Friday, May 3, 2013 at 3:51am

math
You randomly choose 28 days for your work in March. Find the probability that you are o work on 8th and 16th and 24th March.
Friday, May 3, 2013 at 3:51am

math
Positions of a woman and her dog at any time on the complex plane are z and 2z^2013 + z + 1, respectively. How many turns does the dog make around the origin if the woman goes once along the circle |z| = 1?
Friday, May 3, 2013 at 3:50am

math
The price p(t) of a share at a time t satisfi es the equation p + t = 1 + e^-p sin(pi*t). Justify if p(t) is increasing or decreasing at t = 0.
Friday, May 3, 2013 at 3:49am

math
Let F,G be vector fields on the plane such that both com-positions F dot G, G dot F : R^2 -> R^2 -> R^2 are the identity (x, y)->(x, y). Prove that the fi eld F is incompressible if and only if G is incompressible. (A vector fi eld is called incompressible ...
Friday, May 3, 2013 at 3:48am

math
Show that for random variables X, Y and Z we have E[E[E[x|y]|z]] = E[X]:
Friday, May 3, 2013 at 3:42am

math
Break a stick of length 1 at a uniform location and then choose either of the two parts with equal probabilities. If X denotes the length of the part you choose, compute E[X] and var(X).
Friday, May 3, 2013 at 3:38am

math
A machine prints out the number 1, 2, or 3 with equal probabilities. A machine starts printing numbers independently one after another and stops the rst time it prints 1. Let X denote the number of 2s it printed. Compute E[X] and var(X).
Friday, May 3, 2013 at 3:38am

math
You are driving a car and the speed is an exponentialy distributed random variable with mean 50 (in miles per hour). The speed limit is 60 miles per hour, and if your speed is x > 60 miles per hour, the probability you are stopped by the police is 1 􀀀 e6􀀀x...
Friday, May 3, 2013 at 3:37am

applied math
A boat is located at a random location uniformly distributed inside of the circular pool of radius 1 mile. The boat is tied by a rope to a pole located directly at the center of the pool. A bird lands on the rope at the uniformly random location. If X is the distance between ...
Friday, May 3, 2013 at 3:37am

math
It is known that the number of people who enter a bank during a time interval of t minutes is a Poisson random variable with the parameter t. The bank opens at 8am and you arrive at the bank at uniformly random time between 8am and 9am. Let X be the number of people who ...
Friday, May 3, 2013 at 3:36am

math
To square 75, one can multiply (70)(80) and add 25 to that product. Can someone explain how this would work, without calculating?
Friday, May 3, 2013 at 1:56am

MATH
if \$250.00 IS INVESTED AT 6% COMPOUNDED MONTHLY WHAT IS THE AMOUNT AFTER 8YEARS
Friday, May 3, 2013 at 12:07am

Math
Elliot finished studying at 4:45 p.m. He spent 30 minutes reading a social studies chapter. he spent 45 minutes on his math homework. At what time did Elliot begin studying?
Friday, May 3, 2013 at 12:05am

Math
Problem Solving Work Backward The temperature was 16 degree Celsius when Becky returned home at 6 p.m. The temperature was 4 degree Celsius warmer at 3 p.m. than it was at 6 p.m. It was 3 degree Celsius warmer at 12 noon than it was at 3 p.m. What was the temperature at 12 noon?
Friday, May 3, 2013 at 12:02am

Math (Algebra)
You are trying to distribute 566 ice creams and 183 cookies evenly to all of the students in a class. But you end up having 5 ice creams left and 4 cookies short. What is the maximum number of students in the class?
Friday, May 3, 2013 at 12:01am

Math (Algebra)
How many distinct rational numbers can be expressed in the form a/b, where a and b are integers such that 1 ≤ a < b ≤10?
Friday, May 3, 2013 at 12:01am

Math
Problem Solving Work Backward The test that Keyshawn's class took finished at 10:30 a.m. The first part of the test took 30 minutes. There was a 15 minute break. The second part of the test also took 30 minutes. At what time did the test start?
Thursday, May 2, 2013 at 11:59pm

Math
Problem Solving: Work Backward At 12 noon, Leslie recorded the temperature as 56 degree Fahrenheit. The temperature had increased by 8 degree Fahrenheit from 10 a.m. The temperature at 8 a.m. was 2 degree Fahrenheit warmer than it was at 10 a.m. What was the temperature at 8 a.m.
Thursday, May 2, 2013 at 11:52pm

Math
How many ordered pairs of integers (x,y) are there that satisfy |x|+|y|=10?
Thursday, May 2, 2013 at 11:42pm

Math
A trail mix contains a 4: 7 ratio of raisins to peanuts. How many kilograms of raisins are there if there are four kilograms of peanuts in the mix?
Thursday, May 2, 2013 at 10:47pm

math
graph the following functions. label the axis of symmetry, vertex, and points: y=x^ -5x +4
Thursday, May 2, 2013 at 10:38pm

Math
The digit in the hundreds place is a square number, and it is odd. The digit in the tens place is 1 more than the square root of 16. The digit in the hundredths place is 0.1 larger than 1/10 of the digit in the hundreds place. The digit in the thousands place is equivalent to ...
Thursday, May 2, 2013 at 10:38pm

15. Do the data in the table represent a linear function? If so, write a rule for the function. x –3 –2 –1 0 1 y 1 –2 –5 –8 –11 (1 point) yes; y = –3x – 8 yes; y = 1/3x – 8 yes; y = 1/3x + 8 yes; y = 3x + 8 16. Write a ...
Thursday, May 2, 2013 at 9:20pm

6. Use the function rule ƒ(x) = x2 – 5x + 1. Find the output ƒ(–3). (1 point) 7 –5 25 5 7. Suppose you earn \$12 each time you mow the lawn. Use function notation to describe the relationship between your total earnings E and the number of times m you ...
Thursday, May 2, 2013 at 9:01pm

Math
Does this set of data have any outliers? Data: 1, 2, 2, 4, 6, 6, 7, 8, 9, 10, 12, 13, 16, 16, 18. no or yes
Thursday, May 2, 2013 at 8:43pm

13. Mia charges \$2.25 per hour when she babysits, plus \$5.00 for transportation expenses. Write a function rule to represent the amount y Mia charges to babysit for x hours. (1 point) y = 2.25x + 5.00 y = 5.00y + 2.25 y = 5.00x + 2.25 y = 7.25x 14. The sale price of ground ...
Thursday, May 2, 2013 at 8:34pm

Matrices (math)
0.433= (45.6*A) + (3.152*B) 0.3363= (11.92*A) + (37.675*B) Solve for A and B using matrices
Thursday, May 2, 2013 at 8:32pm

Math
What is \$4.80 rounded to the nearest cent?
Thursday, May 2, 2013 at 8:26pm

Math
The length of a rectangle is 11 cm less than 3 times its width. If the area of the rectangle is 20 square inches, find the length and width
Thursday, May 2, 2013 at 8:01pm

math
The football field is 60 yards by 100 yards.Is the length of the diagonal across this field more or less than 200 yards?
Thursday, May 2, 2013 at 7:08pm

math
What is 14 7/8 as a decimal?
Thursday, May 2, 2013 at 7:04pm

math
1/3 of what equals 1/9
Thursday, May 2, 2013 at 6:45pm

A contractor has been asked to pave 15 miles of new road. Before he can set his price, he needs to know how much the cement will cost. If the road is 45 feet wide and 9 inches thick and the cost of cement is \$35 per cubic yard, what will be the cost of the cement needed for ...
Thursday, May 2, 2013 at 6:29pm

math
If twenty percent of the students play in the band and the band has forty members, how many students are there? Please help me
Thursday, May 2, 2013 at 6:11pm

Math
If about 3000 of every recall model of a vehicle actually need rework, what is the probability that your (recalled) car will not need a rework if there are 120000 cars of that model sold, and if 1000 of them are already off the road (this is a monkey wrench!). State your ...
Thursday, May 2, 2013 at 5:59pm

math
if the volume of a room is 864 and the length and width are the same, what is the height?
Thursday, May 2, 2013 at 5:55pm

Math
A contractor has been asked to pave 15 miles of new road. Before he can set his price, he needs to know how much the cement will cost. If the road is 45 feet wide and 9 inches thick and the cost of cement is \$35 per cubic yard, what will be the cost of the cement needed for ...
Thursday, May 2, 2013 at 5:51pm

math
How do you estimate 6/11 x 12?
Thursday, May 2, 2013 at 5:51pm

math
xavier share a package of 37 pizza bites with 4 of his friends.If all the boys ate the same number of pizza bites,how many were left over?
Thursday, May 2, 2013 at 5:46pm

math
what is 3 2/5 as a decimal
Thursday, May 2, 2013 at 5:44pm

math
A stadium is divided into 8 sections. Each section has 72 rows and each row contains 25 seats. How many seats are in the stadium.
Thursday, May 2, 2013 at 5:18pm

Math
Problem Solving: Work Backward Will arrived at his mother's office at 3 p.m. It took him 30 minutes to walk from his home to the mall. He was in the mall for 45 minutes. It them took him 15 minutes to walk to his mother's office. At what time did Will leave home?
Thursday, May 2, 2013 at 5:10pm

How do you do square route i know a little like square route of 9 is 3 but i need more practice with square routes do you know any websites that can help.
Thursday, May 2, 2013 at 5:08pm

math
Dave sent five emails every 6 minutes for 30 minutes. Lee sent 4 emails every 5 minutes for 30 minutes. Who sent more emails?
Thursday, May 2, 2013 at 4:30pm

math
(Math+lice)+ (equations+R+P- Square)= Decimal_______ I don't have a clue How to do this
Thursday, May 2, 2013 at 4:25pm

math
2/3 * 1 1/2
Thursday, May 2, 2013 at 4:21pm

math
55,89,144____,____,____ find the next 3 mbers
Thursday, May 2, 2013 at 4:18pm

math
Adnan asked 20 friends to tell him their favorite season of the year. Autumn was the favorite season of the year for 30% of Adnan’s friends. How many of his friends chose autumn?
Thursday, May 2, 2013 at 4:10pm

Math
Davids poster is 62 centimeters long.teds poster is 7 decimeters long.who posters is longer
Thursday, May 2, 2013 at 3:51pm

Math
Ben say his computer screen is 5 decimeters long.kim says her computers screen is 52 centimeters long.who computer screen is longer?
Thursday, May 2, 2013 at 3:50pm

math
Find the probability between 42 and 48 speeders in a random sample of 100
Thursday, May 2, 2013 at 3:30pm

Math-calculus
Evaluate ∫∫ln(x^2+y^2)/sqrt(x^2+y^2) dA where 1≤x^2 +y^2≤e
Thursday, May 2, 2013 at 2:51pm

math
You are off to soccer and love being a goalkeeper, but that depends who is the coach today : - with coach Ahmed the probablity of being a goalkeeper is 0.5 -with coach Usman the probability of being a goalkeeper is 0.3 Ahmed is coach more often.About 6 out of every 10 games ( ...
Thursday, May 2, 2013 at 2:47pm

1. A bag contains 9 tiles numbered 1 to 9. P(4) one-ninth = A. experimental; the result is found by repeating an experiment. B. experimental; the result is based on the number of possible outcomes. C. theoretical; the result is found by repeating an experiment. D. theoretical...
Thursday, May 2, 2013 at 2:07pm

math
a two figure number is written down at random find the probability a)that the number is greater than 68 b)the number is a multiple of 9 c) it is less than 100 d) it contains at least one 5 (i.e a number such as 15 or 55
Thursday, May 2, 2013 at 1:40pm

math
What are the coordinates of the center of the circle and the length of the radius with the equation (x+3)^2+(y-2)^2=16? Show your work.
Thursday, May 2, 2013 at 1:36pm

math
You need to hire a part-time associate to work 30 hours a week in your store. You have \$250 in labor budget for the new associate each week. You just interviewed an excellent candidate for the position who has requested to be paid \$9.00 per hour. Your average part-time ...
Thursday, May 2, 2013 at 1:18pm

Math
Use Excel’s PMT function to calculate the monthly mortgage payment
Thursday, May 2, 2013 at 12:52pm

math
x to the power -7/2 into 2x to the power -1/2=?
Thursday, May 2, 2013 at 12:04pm

Math
5. Find the solution to the system of equations by using either graphing or substitution. y = 6 – x and y = x – 2 (2, 4) (–4, 2) (4, 2) no solutions 6. y = 2x – 1 and y = x + 3 (1 point)(4, 7) (7, 4) (–7, –4) infinite solutions 7. y = 4x and y + ...
Thursday, May 2, 2013 at 10:18am

Math help
You buy 3 pounds of organic apples for \$7.50. The graph shows the price for regular apples. What is the unit rate for each type of apples?
Thursday, May 2, 2013 at 10:13am

Math
A road worker holds a flag in position R with an out strech arm. He swings the flag downward and it forms angle of 30degrees with the ground P. His shoe Q is 2,5 away from P. His head is 24cm above his shoulder. calculate the height of the man
Thursday, May 2, 2013 at 8:36am

math
The buying and selling commission schedule shown below is from a well-known online discount brokerage firm.? Taking into consideration the buying and selling commissions in the schedule find annual rate of interest earned by each investment? Transaction Size Commission Rate \$0...
Thursday, May 2, 2013 at 7:44am

I'm not sure how to solve this: A group of friends went to an amusement park. 10 of them rode the ferris wheel, 15 rode carousel, and 11 rode the roller coaster. 7 of them rode both the ferris wheel & roller coaster. 4 rode both the ferris wheel & carousel. 5 rode both the...
Thursday, May 2, 2013 at 7:03am

math
Todd is moving sand from his driveway to the backyard. The wheelbarrow weighs 30 kilograms when it is full of sand. When it is empty, it weighs 12 kilograms. How many grams of sand did Todd move if he filled and emptied the wheelbarrow five times? answer:210,000 grams Is it ...
Thursday, May 2, 2013 at 7:03am

Math (Algebra)
Given a positive integer n, let S(n) denote the digit sum of n. Consider the sequence of numbers given by n₁ = S(n) nk = S(nk−1)k≥2 For how many positive integers n ≤ 2013 does the sequence {nk} contain the number 9?
Thursday, May 2, 2013 at 5:48am

Math
N is increased by 2n,the sum is 5more than 4n
Thursday, May 2, 2013 at 3:38am

Math (Algebra)
You are trying to distribute 566 ice creams and 183 cookies evenly to all of the students in a class. But you end up having 5 ice creams left and 4 cookies short. What is the maximum number of students in the class?
Thursday, May 2, 2013 at 3:23am

Math
15 decreased by twice n equals 13
Thursday, May 2, 2013 at 3:15am

Math (Algebra)
You are trying to distribute 566 ice creams and 183 cookies evenly to all of the students in a class. But you end up having 5 ice creams left and 4 cookies short. What is the maximum number of students in the class?
Thursday, May 2, 2013 at 3:03am

Math (Algebra)
How many distinct rational numbers can be expressed in the form a/b, where a and b are integers such that 1 ≤ a < b ≤ 10?
Thursday, May 2, 2013 at 3:03am

Math (Algebra)
You are planning to lay square tiles on an entire 21125cm by 54925cm rectangular floor without any overlapping. If all the square tiles must be of the same size, what is the least possible number you can lay?
Thursday, May 2, 2013 at 3:02am

Math (Algebra)
If x+y+z=16 and xy+yz+zx=85, what is x^2+y^2+z^2?
Thursday, May 2, 2013 at 2:57am

Math (Algebra)
How many distinct geometric progressions are there, such that the first term is 1, the last term is 1024 and every term is an integer?
Thursday, May 2, 2013 at 2:55am

Math
Natalie performs a chemistry experiment where she records the temperature of an ongoing reaction. The solution is 93.5º C after 3 minutes; 90º C after 5 minutes, 84.8 C after 9 minutes; 70.2º C after 18 minute; 54.4º C after 30 minutes; 42.5ºC after ...
Thursday, May 2, 2013 at 1:35am

math
If cos25+sin25=k then the value os cos20 is ?
Thursday, May 2, 2013 at 1:03am

Math
I need to find the exact value of tan(arccos(-sqrt 11/6)).
Wednesday, May 1, 2013 at 11:21pm

Math
Consider all 3-term geometric sequences with first term 1 and with common ratio the square of an integer between 1 and 1000 (inclusive). How many of these 1000 geometric sequences have the property that the sum of the 3 terms is prime?
Wednesday, May 1, 2013 at 11:21pm

math
Elizabeth has a box of shirts. one half of the shirts are small, 2/5 of the shirts are medium, and 5 shirts are large. How many shirts are in the box?
Wednesday, May 1, 2013 at 11:13pm

math
If velocity v of blood flow at distance r from the center of an artery of radius R is given by v = k (R^2 - r^2), constant k > 0, find the average velocity v along the radius of an artery using 0 to R as the limits of integration
Wednesday, May 1, 2013 at 11:04pm

math
A conical funnel has a base diameter of 4 cm and a height of 5 cm
Wednesday, May 1, 2013 at 10:55pm

Math
emma throws the javelin for the track team. At one meet she threw the javelin twice. One the first attempt she three 28 meter and on the second attempt she threw 32 meters. What is the ratio between the length of the first throw and the second throw?
Wednesday, May 1, 2013 at 10:43pm

Math
At 30 degrees, Edgardo said the temperature was warm enough to go swimming. Did he mean to give the temperature in Fahrenheit or Celsius. Explain.
Wednesday, May 1, 2013 at 10:28pm

math
Find f’(x) if f(x) = 3^g(x) where g(x) = LOG_3(x^2 - √x + 4/x + 10*LOG_e(x))
Wednesday, May 1, 2013 at 10:27pm

Math
A bicycle lock has a 4-digit combination. Each of the digits is a number from 0 to 9. Find the probability that the lock has a combination in which 3 of the 4 digits are 3s
Wednesday, May 1, 2013 at 10:20pm

Math
An individual has 25000 to invest. As their financial consultant, you recommend investing in Treasury Bills earning 7%, Corporate Bonds earning 9% and Junk Bonds earning 11%. Find all the investment alternatives that will earn \$2000 per year.
Wednesday, May 1, 2013 at 10:04pm

math
if a woman has a 50 ft. piece of wire & cuts it into strips 1 2/3 feet long, how many pieces will she have
Wednesday, May 1, 2013 at 9:51pm

math
In a collection of nickels, dimes and quarters, there are twice as many dimes as nickels, and 4 fewer quarters than dimes. The total value of the coins is \$5.75. How many nickels are there in the collection ?
Wednesday, May 1, 2013 at 9:49pm

math
h(t)= 20t-4.9t^2
Wednesday, May 1, 2013 at 9:43pm

math
If the length of a rectangle is 4 more than 3 times the width, and the perimeter is 32 meters, what are its dimensions? Please enter your answer as two numbers without the units, separated by a comma.
Wednesday, May 1, 2013 at 9:22pm

college algebra
I have been stuck on this problem for over a week and I don't even know how to start the problem. Parabola equation y= 4(100 - x^2/2500) x and y are measured in feet A. Find the length of the road across the bridge B. find the height of the parabolic arch at the center of ...
Wednesday, May 1, 2013 at 9:07pm

math
what is 5X8=
Wednesday, May 1, 2013 at 8:50pm

Austin & Kaitlyn Kojan invested \$195,000 in a business venture. If Kaitlyn invested 2 1/4 as much as Austin invested, how much money did Kaitlyn invest?
Wednesday, May 1, 2013 at 8:47pm

math (Algebra)
I was wondering if someone can help me with this question ,please... (2r5+r3)^2 r=radical
Wednesday, May 1, 2013 at 8:39pm

math
1/4v=5 Use the substitution method to solve this problem.
Wednesday, May 1, 2013 at 7:16pm

math
Jim draws a sketch of his bedroom wall to scale. The actual wall is 10 feet long and 8 feet high. The drawing is one- sixth the length and width of the actual wall. What are the dimensions of the drawing in inches?
Wednesday, May 1, 2013 at 7:12pm

math
245 = .25x not sure how to do this since I have only learned with ratios
Wednesday, May 1, 2013 at 6:09pm

Math
Juan's model locomotive is 7 5/8 in long HIs coal car is 6 1/4 in long when hooked together there is a 7/8 inch space between the cars. What is the total length when the two cars are hooked together? I added the fractions and got 13 7/8 what do I do with the 7/8 in space ...
Wednesday, May 1, 2013 at 6:05pm

Math
using the expression area of a circle = 3.14r^2 detemine how much of the floor in Barbara's room will be covered by a rug with a diameter of 8 ft. I know the answer is 50.24 ft but I wasn't sure if I'm supposed to write it as 50.24 ft. or 50.24 ft^2 thanks....
Wednesday, May 1, 2013 at 5:53pm

Math
I'm having a hard time coming up with the right equation to solve this one. E-Z Stop Fast Gas sold \$10,957 worth of gasoline yesterday. Regular grade sold for \$2.30 a gallon and premium grade sold for \$2.55 a gallon. If the station sold 420 more gallons of regular than of ...
Wednesday, May 1, 2013 at 5:47pm

Math
Is this the correct numerical expression for 15 less than one-ninth of P? 15-1/9 P
Wednesday, May 1, 2013 at 5:45pm

Math
When I add the mixed number 1 5/6 + 1 3/4 I get 2 19/12 How do I simplify that?
Wednesday, May 1, 2013 at 5:44pm

Math
Natalie performs a chemistry experiment where she records the temperature of an ongoing reaction. The solution is 93.5º C after 3 minutes; 90º C after 5 minutes, 84.8 C after 9 minutes; 70.2º C after 18 minute; 54.4º C after 30 minutes; 42.5ºC after 37...
Wednesday, May 1, 2013 at 5:37pm

Math
What do mountains breathe through? Volcanose?
Wednesday, May 1, 2013 at 5:30pm

Math
The Book Nook makes four times as much revenue on paperback books as on hardcover books. If last month’s sales totaled \$124,300, how much of that money was made on paperbacks?
Wednesday, May 1, 2013 at 5:28pm

Math
67 4/7 - 17 How do do this one? Do I need to bother because the fraction has nothing to subtract with but the whole numbers do
Wednesday, May 1, 2013 at 5:21pm

math
A spherical ballon is being inflated at the rate of 35cc/min. the rate of increase in the surfece area(un cm²/min.) of the ballon when its diameter is 14cm is: 1. 10 * under root 10 2. under root 10 3. 100 4. 10
Wednesday, May 1, 2013 at 5:16pm

Math
One-ninth of Polymer Plastics’ sales are made in New England. If New England sales amount to \$600,000, what are the total sales of the company?
Wednesday, May 1, 2013 at 5:15pm

math
(Mad +lice)+(equations + r +p - square)= decimal_______
Wednesday, May 1, 2013 at 4:28pm

Math
Ariel's garden is planted in the shape of a square and has an area of 81 square feet. If she plans to put a fence around the perimeter of the garden, how much fencing will she need? A) 18 ft, B) 41 ft C) 36 ft D) 9Ft I came up with D 9 foot but apparently I didn't work...
Wednesday, May 1, 2013 at 4:12pm

Math
You observe a plane approaching overhead at a speed of 600 mph. The angle of elevation of the plane is 14 degrees at one time and 54 degrees two min later. A) What is the altitude of the plane? B) how far from the plane are you (after two minutes)?
Wednesday, May 1, 2013 at 3:45pm

How do you add fractions with different denominators? Thanks if you help :)
Wednesday, May 1, 2013 at 3:33pm

math
In a sample of 77 widgets,6 were defective, How many defective widgets would you expect in a sample of 616 widgets?
Wednesday, May 1, 2013 at 2:24pm

math
At the Had Matter's coffee party, he has 11 different types of cups, and 6 different types of ground coffee beans. The Had Matter insists that no two people who attend his party can be drinking from the same type of cup with the same type of ground coffee beans. What is ...
Wednesday, May 1, 2013 at 1:46pm

math
A rainwater collection tank is shaped like a cylinder with a diameter of 4 ft and a height of 6 ft. What is its volume? Use 3.14 for pi. A. 15 units^2 B. 20 units^2 C. 30 units^2 D. 62 units^2
Wednesday, May 1, 2013 at 1:23pm

Math
If you have 25 poles at 24'' foot long and your cut the poles 7'' 7/8 how many posts would you have altogether
Wednesday, May 1, 2013 at 1:21pm

math
if sin^14A+cos^20A=x then find the smallest interval in which value of x lie
Wednesday, May 1, 2013 at 12:57pm

Math (Algebra)
As x ranges over all real values, what is the minimum value of the polynomial x4−14x2+303?
Wednesday, May 1, 2013 at 12:31pm

Math (Algebra)
The roots of the polynomial f(x)=7x2+31x+c=0 are reciprocals of each other. What is the value of c?
Wednesday, May 1, 2013 at 12:30pm

Math (Algebra)
Arnau is running a luggage shop. A brand-new item priced at 30% above the cost price did not sell well. So he took 39 dollars off the price, and found that the bags sold very well. If the profit for each bag is now 10% of the cost price, what is the cost price (in dollars)?
Wednesday, May 1, 2013 at 12:28pm

Cal/Math
F(x) = 3-2x, x is less than or equal to 5 F(x)= e^x find the absolute and local max and mins of f
Wednesday, May 1, 2013 at 12:26pm

math
number N of state and federal inmates in millions during year x where x >=2002 can be approximated by the following formula N=0.04x-79.02. determine the year in which there were 1.1 million inmates
Wednesday, May 1, 2013 at 12:16pm

Math (Algebra)
The ratio of three positive integers is 2:4:5 and their least common multiple is 300. What is the sum of the smallest and the largest of the three numbers?
Wednesday, May 1, 2013 at 12:11pm

Math
A math class has girls and boys in the seventh grade and girls and boys in the eighth grade. The teacher randomly selects a seventh grader and an eighth grader from the class for a competition. What is the probability that the students she selects are both girls? Write your ...
Wednesday, May 1, 2013 at 11:43am

Math/Stats
I have like 9 more of these problems, can someone please help me out so I can get started. thanx JS In a random sample of 35 tractors, the annual cost of maintenance was \$4,425 and the standard deviation was \$775. Construct a 90% confidence interval for this. Assume the annual...
Wednesday, May 1, 2013 at 10:35am

math
exercise no 1.4 question no 5
Wednesday, May 1, 2013 at 10:34am

math
Assume you do not know the population standard deviation. describe how you form a 90% confidence interval to estimate the population mean age for students at Westwood College Online.
Wednesday, May 1, 2013 at 10:01am

math
what is the literal equation for v+f-e=2
Wednesday, May 1, 2013 at 9:19am

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