Sunday
August 2, 2015

Homework Help: Math

Branches of Math

Recent Math Questions

Math
. At a track meet, 50 people ran the 100-meter dash. 2 people finished in 11 seconds, 5 people finished in 12 seconds, 8 people finished in 13 seconds, 10 people finished in 14 seconds, 21 people finished in 15 seconds, 2 people finished in 16 seconds, and 2 people finished in...
Wednesday, May 6, 2015 by Ashley

math
Suppose the matrix A has eigenvalues lambda_1 = -1, lambda_2 = 1, lambda_3 = 2, with corresponding eigenvectors v_1 = [0 5 3]^T, v_2 = [2 0 1]^T, v_3 = [1 -1 0]^T. If you diagonalize A as A = PDP^-1 with P = [2 2 0; p_21 p_22 2; p_31 p_32 p_33], D = [2 0 0, 0 1 0; 0 0 -1], ...
Wednesday, May 6, 2015 by Anonymous

math
A. determine the equation of the circle passing through points A(3;2) B(8;12) and C(-6;-2) B. a chord of the circle x^2+y^2=50 has a midpoint at (6;3). determine the equation of this chord.
Wednesday, May 6, 2015 by Anonymous

finance math
A single person earns a gross biweekly salary of $780 and claims 6 exemptions. What is the person's net pay? a. It is the same as the gross pay. b. It is $11 more than the gross pay. c. It is $11 less than the gross pay. d. It is $13 less than the gross pay.
Wednesday, May 6, 2015 by angela

math
A countrywide estate agency specializes in selling commercial ventures. Their records show that the mean selling time is less than 90 days. Because of recent economic conditions, they believe that the mean selling time is now greater than 90 days. A countrywide survey of 100 ...
Wednesday, May 6, 2015 by Frans

math
find the slope of the following graphs. x -1,0,1,2 y 4,2,1,-2 a.1 over 2 b.2 c.-2* d.- 1 over 2 find the slope of the following graphs. x -2,2 y 5,1 a.3 over 2 b.1 c.-1* d.- 3 over 2 find the slope of the following graphs. x 0,3 y 0,2 a.2 over 3* b.3 over 2 c.3 d.- 2 over 3 ...
Wednesday, May 6, 2015 by collin

math
prove that: 4cosec2ACot2A=cosec^2A - sec^2A
Wednesday, May 6, 2015 by peter

Math
A cylinder cop has a circular base of radius 7cm & height of 10cm taking 22/7(a)calculate it curved surface(b)d area of it circular base
Wednesday, May 6, 2015 by patience daniel

Math
There are 64 students. 80% scored a 75 on a final test. How many students scored a 75?
Wednesday, May 6, 2015 by Ron

math
find the slope of the line that goes through the following points: x 0 1 2 3 _________________ y -4 -3 -2 -1
Wednesday, May 6, 2015 by riri

math
Terrell has a water purifier for backpacking. It will purify 1 liter of water in 1 minute. How long would it take Terrell to purify enough water for 4 canteens that each hold 750 mL, and two that each hold 1.5 L?
Tuesday, May 5, 2015 by Ri!@#$%^&a Papaiya

7th grade math (probability)
1. Cmdr's coffee shop offers a coffee special with coffee syrups of vanilla, chocolate, and caramel. You can also choose between a latte, and cappuccino. How many different coffees can you make for the special? Ans: 6 (VLatte, ChocLatte, CLatte; VCap, ChocCap, CCap) 2. ...
Tuesday, May 5, 2015 by Alexis

Math/algebra
Post a New QuestionCurrent Questions Homework Help: Algebra Posted by Kristen on Tuesday, May 5, 2015 at 7:53pm. A bank teller counts her $10 and $5 bills at the end of the day. She has a total of 70 bills. The total value of the money is $595. Let f represent the number of $5...
Tuesday, May 5, 2015 by Kristen

Math
A) Let x represent the number of messages posted each month on a social netwroking website. B) let x represent the length of time it takes to get to work. I got A) continuous B) discrete Am i correct??
Tuesday, May 5, 2015 by Aqueen

Math
How do you find the quadratic equation, in standard form, that has the roots x= (2±√5)/3
Tuesday, May 5, 2015 by Lily

Math
What does a and c stand for in the quadratic function Ax^2+bx+c
Tuesday, May 5, 2015 by M

Math
Q. Sammy loves miniature golf. Last year he played 572 games of miniature golf. Assuming that Sammy played the same number of games each week, how many games per week did Sammy play last year? Hint: there's 52 weeks in a year! A. Do I divide 572 by 52?
Tuesday, May 5, 2015 by Jeanie

Math
A student covers the outside of a show box with construction paper. If the student does not cover the lid, what is the surface area that is covered? Please show work. Possible answers: A) 982.25 B) 1433.50 C) 1964.50 D) 5044.50
Tuesday, May 5, 2015 by Victoria

math
A certain sum of money was shared among 3 friends, A, B, and C. A received 3/7 of the money, and B got 2/3 as much as A. C received $49 less than A. a) Find the ratio of B’s money to C’s money. b) How much money did C receive?
Tuesday, May 5, 2015 by jessi

Math
Determine which function has the greater rate of change in this question? These are the points on the graph. A. (-1,0), B(0,1) C(1,2) This is the table X, -1,0,1,2 Y, 0,1,2,3 A. The rates of change are equal. B. The graph has a greater rate of change. C. The table has a ...
Tuesday, May 5, 2015 by Dove

Easy math
Question: Susie got the following scores for the first 18 holes of miniature golf: 3,4,2,1,4,4,2,3,4,3,2,1,2,3,3,5,4 and 3. If par for the first 18 holes is 45 strokes, is Susie's stroke total over, under, or equal to par? - Answer: do I add 18 by 45?
Tuesday, May 5, 2015 by Tara

math
Multiplication is defined as repeated addition. Use the word repeated to define exponential form. Justify your reasoning.
Tuesday, May 5, 2015 by yoana

math
line of symmetry
Tuesday, May 5, 2015 by billy

math
5 and 1/4=4 and what numerator over 4
Tuesday, May 5, 2015 by seld

Math
Apply the following transformations to this parabola. Y=2(x+3)^2-1 A) reflection in the x-axis, followed by a translation 5 units down. I got : y = -2(x+3)^2-6 But the answer is y= -2(x+3)^2-4 Why is it -4 And also. How odd you do reflections in the y axis without drawing the ...
Tuesday, May 5, 2015 by Lily

math
what is the equivalent fraction for ninety over one hundred
Tuesday, May 5, 2015 by angelo

Math - 7th grade
Can you check/explain the following: 1. If you roll a number cube 66 times, how many times should you expect to roll a 1? a. 9 times b. 11 times c. 8 times d. 10 times Ans. P(1) = favorable outcome/possible outcome = 66/396 , (1 x 66rolls, and 6sides x 66 rolls = 396) = 16.66...
Tuesday, May 5, 2015 by Alexis

Math
Determine one of the zeros of the quadratic realtion: y=(x-(k/2))^2-[(k-2)^2/4] I tried to do this by expanding and got to y=x^2-mx-k+1 How are you suppose to do this
Tuesday, May 5, 2015 by Lily

Business Math
Find the amount due on a $300 invoice received on June 3 and paid on June 11 if the sales terms are 3/15, n/30. I can't figure this out! Please help!
Tuesday, May 5, 2015 by Miah

Math
If I have 5 different types of trees and want to plant them in groups of three, how many different combinations of groups can I make. I worked this out and came out with 30. Am I right? Thanks for your help
Tuesday, May 5, 2015 by Jessie

Math
-9(8+4v)
Tuesday, May 5, 2015 by Sarah

math
Which of the following side lengths could combine to form a triangle? a. 17, 13, 2 b. 15, 18, 24 c. 5, 9, 14 d. 16, 32, 16
Tuesday, May 5, 2015 by boss

math
maya made a sign with an area of 48 square centimeters What could her sign look like
Tuesday, May 5, 2015 by julia

math
Two boats leave a port at the sametime. The first travels at 15km/hr on a bearing of 135 degree. While the second travels at 2km/hr on a bearing of 63 degree . If after 2hours the second boat is directly North of the first boat, calculate their distance apart.
Tuesday, May 5, 2015 by Anonymous

math
you have apple, mapple, oak, poplar, and spruce trees. about how many different groups can u make with three different trees? please help this is alot of work and i have until 4;45 to get it all done!
Tuesday, May 5, 2015 by please help

math
Sophia bought 3 yards of trim to put around a rectangular scarf. She wants the width of the scarf to be a whole number that is at least 6 inches and at most 12 inches. if she uses all the trim, what are the possible dimensions of her scarf? write your answers in inches.
Tuesday, May 5, 2015 by seahawks

Math
There are 20 books on a summer reading list. In how many ways can you choose 1 per week for 6 weeks.
Tuesday, May 5, 2015 by Steve

Math
You spin a spinner that has 8 equal sections numbered 1 to 8.Find p(perfect square or odd).
Tuesday, May 5, 2015 by Steve

Math
If the volume of a cone is 1/3 pi r^2 h, then how can it also be 1/3 pi r^3?
Tuesday, May 5, 2015 by Anonymous

MATH ONE QUESTION!
The student council is making six right triangular pennants to promote school spirit. Each right triangle is 9 inches high and 2 feet long. In square feet, what is the total area of six pennants.
Tuesday, May 5, 2015 by Anonymous

math
I am trying to find the eigenvalues . They are 0 and 2 but i keep on just getting 0. its a4X4 matrix. [ 1 1 0 0 1 1 0 0 0 0 0 0 0 0 0 0]
Tuesday, May 5, 2015 by Anonymous

Math
Hi(-: A newspaper editor wants to know whether people who buy the newspaper like the paper’s new format. He prints an alphabetical list of all the employee names and asks every fifth person on the list. Is the sample likely to be biased or unbiased? Explain your answer. I...
Tuesday, May 5, 2015 by Crystal

math
a. the line y=7x cuts the circle x^2+y^2=50 at A and B. find the coordinates of A and B. b. show that C(5;5) lies on the circle. c. show that ACB angle C=90degrees. what can you deduce about AB? d.find the equation of the tangent to the circle at C
Tuesday, May 5, 2015 by Anonymous

math
An amount of $27,000 is borrowed for 6 years at 8.25% interest, compounded annually. If the loan is paid in full at the end of that period, how much must be paid back?
Tuesday, May 5, 2015 by Jane

math
A Thai restaurant offers the curry special: curry vegetables with your choice of beef, chicken tofu or shrimp. Choose yellow curry, green curry or red curry. Drink included: tea or soda. If a customer makes all choices randomly, what is the probability that she orders a yellow...
Tuesday, May 5, 2015 by rosie

Math
Sayed gave an answer of 6 6/7 for the problem 4 2/7 times 1 3/5. Using the estimates, is this a reasonable answer.
Tuesday, May 5, 2015 by Ishmel

math
The ratio of the number of male lions to female lions in the animal reserves is 21:20. If there are 123 lions in the animal reserve, how many of the lions are female? Thank you!
Tuesday, May 5, 2015 by Scotty

math
The length of a rectangle is 3 m more than double the width, and the area of the rectangle is 54 m^2. Find the dimensions of the rectangle.
Tuesday, May 5, 2015 by lina

Math
The electrical resistance, r ohms, of 1,000 ft of solid copper wire at 77¡ãF can be approximated by the model r = 10,770 / d^2 - 0.37 for any wire diameter, d mils (1 mil = 0.001 inch), such that 5 ¡Ü d ¡Ü 100. What is the approximate ...
Tuesday, May 5, 2015 by Anonymous

Math
Traveling at approximately 186,000 miles per second, about how many miles does a beam of light travel in 2 hours? F. 3.72 x 10^5 G. 2.23 x 10^6 H. 2.67 x 10^7 J. 6.70 x 10^8 K. 1.34 x 10^9
Monday, May 4, 2015 by Anonymous

Math
How to find the perimeter of a 10 step staircase
Monday, May 4, 2015 by Jose

math
tell what whole number you can substitute for x in each list so the numbers are ordered from least to greatest. a. 2/x, x/22, 33% b. 1/x, x/8, 33%
Monday, May 4, 2015 by susan

Math
What is it like to live under a carpet
Monday, May 4, 2015 by Eunice

math
which graph represents the linear function y= 1/3x -4
Monday, May 4, 2015 by HELLPP

Math
A tangent is a line that touches a circle at exactly one point. For what values of k will the line y= x+k be tangent to the circle x^2+ y^2 = 25? I know I'm suppose to use the properties of a discrimminate. But how
Monday, May 4, 2015 by Lily

Math
in the relation y=4x^2+24x-5, for which values of y will the corresponding equation have no solutions The answer is y<-41. But I got that y>656 by using d=b^2-4ac
Monday, May 4, 2015 by Lily

Math
If the inequality | a | > | b | is true, then which of the following must be true? A. a = b B. a =/ b <----- is not equal sign C. a < b D. a > b E. a > 0
Monday, May 4, 2015 by Anonymous

math
Grandpa has twenty - four coins in his pocket . grandpa gives Sam some clues the total value of the coins in his pocket one - sixth of coins are quarters , one - half of coins in dimes . what is the total value of the coins in grandpa 's pocket that Sam should discover? ...
Monday, May 4, 2015 by autumn

Math
The equation x^2 + k = 6 x has two distinct real roots. Find the range of values of k. I know that you do 36 -4k > 0 -4k > -36 k < 9 But I don't get why you switch the signs. So. When do u switch signs
Monday, May 4, 2015 by Lily

Easy math
Question: Max and his friends played miniature golf at the new Goofy Golf. Max completed the west section in 35 minutes, and then west section in 41 minutes. Jordan finished the west section in 37 minutes, and then the west section in 42 minutes. Gerardo finished the west ...
Monday, May 4, 2015 by Tara

Math
A pitcher throws a 142 g baseball, which accelerates at a speed of 9 m/s^2. How much force does the pitcher apply to the ball?
Monday, May 4, 2015 by Anonymus

Math
a right angled triangle has a perimeter of 96.22. if the hypotenuse is 40 cm. how long are the other 2 sides. The answer is 25 and 31.22
Monday, May 4, 2015 by Anonymous

Math
a cylindrical cup is made so that the sum of its diameter and its height is 25 cm. find the dimensions of the cup so that the surface area of the cup is a maximum. The answers are. D= 50/3. H=25/3. But how do u get that
Monday, May 4, 2015 by Anonymous

Math
The sum of two numbers is 37. The sum of their squares is 756.5. Find the two numbers The answers are 12.5 and 24.5. But I keep getting 44.69 and -7.69
Monday, May 4, 2015 by Anonymous

math
sketch and label all possible rectangles with a perimeter of 30 cm and sides whose lengths are whole numbers
Monday, May 4, 2015 by khy

Math
A toy rocket is launched with an initial velocity of 180 m/s. The height of the rocket, in metres, can be modelled by h = –5t2 + 180t, where t is the time in seconds the rocket is in the air. How long will the rocket stay above a height of 1000 m Answer: 22.3 s The answer...
Monday, May 4, 2015 by Anonymous

Math
a straight section of railroad track crosses two highways at points that are 400m and 600m, respectively, from an intersection. determine the dimensions of the largest rectangular lot that can be laid out in the triangle formed by the railroad and highways.
Monday, May 4, 2015 by Anonymous

Math
If a^2 = 49 and b^2 = 64, which of the following CANNOT be a value of a + b? F. -15 G. -1 H. 1 J. 15 K. 113
Monday, May 4, 2015 by Anonymous

math
Which hill described in the table is the steepest? (Table) Street: Horizontal (ft): Vertical Rise (ft): Dixie Hill 60 20 Bell Hill 60 40 Liberty Hill 60 30 A. Bell Hill; it rises 2/3 foot for every 1 foot of horizontal travel. B. Dixie Hill; it rises 1 foot for every 3 feet of...
Monday, May 4, 2015 by anonymous

math
The range for company a is 7 and company b is 11. compare the range of each company's sales.
Monday, May 4, 2015 by Angelina

Math
What is the least common denominator when adding the fractions a / 2, b / 3, c / 9, and d / 15? A. 45 B. 90 C. 135 D. 270 E. 810
Monday, May 4, 2015 by Anonymous

Math
Profit from a car boot sale- Shared 5:2 Sita. Rhys Sita gets £30 How much does Rhys get? PLEASE SOMEBODY HELP ME WITH THIS QUESTION!😫
Monday, May 4, 2015 by Chloe

math
Which quadratic rule represents the data in the table? x: -1 | 0 | 1 | 2 | 3 Y: 4 | 5 | 4 | 1 | -4 A. y= -2x^2 + 5 B. y= -x^2 + 5 C. y= x^2 - 4 D. y= x^2 + 5 Is it A or C?
Monday, May 4, 2015 by anonymous

math
which of the triangles described in the table is a right triangle? triangle side 1 side 2 side 3 Q 25 20 15 R 26 20 46 S 25 20 1025 T 25 26 650
Monday, May 4, 2015 by Amanda

math
A kite with a string 30 meters long makes an angle of elevation of 60° with the ground, assuming the string is straight, how high is the kite? Round your answer to the nearest tenth. Do not include units.
Monday, May 4, 2015 by rebal

math
whats is 394.6 divied by 9 to but u have to estimate it when your done
Monday, May 4, 2015 by reg

Math.
Which quadratic rule represents the data in the table? x: -1 | 0 | 1 | 2 | 3 Y: 4 | 5 | 4 | 1 | -4 A. y= -2x^2 + 5 B. y= -x^2 + 5 C. y= x^2 - 4 D. y= x^2 + 5 Is it A or C?
Monday, May 4, 2015 by Anonymous

math
what is 2 fracture each third?
Monday, May 4, 2015 by airric

Math
Which hill described in the table is the steepest? (Table) Street: Horizontal (ft): Vertical Rise (ft): Dixie Hill 60 20 Bell Hill 60 40 Liberty Hill 60 30 A. Bell Hill; it rises 2/3 foot for every 1 foot of horizontal travel. B. Dixie Hill; it rises 1 foot for every 3 feet of...
Monday, May 4, 2015 by Anonymous

Math
The table shows the actual retail market share of passenger cards from Ford Motor Company as a percentage of the U.S. market. Year Market Share 1975 23.6% 1980 17.2% 1985 18.8% 1990 20.0% 1995 20.7% A mathematical model for this date is given by f(x) = 0.04x^2 - 0.8x + 22 ...
Monday, May 4, 2015 by Leslie

math
One ounce of icing covers an area of about 12 inches2. How many ounces of blue icing are needed to cover the top of a round cake that has a diameter of 14 inches?
Monday, May 4, 2015 by brigit

Math
1. Given the function rule f(x)= x^2 - 3x + 2, what is the output of f(-2)? A. 12 B. 4 C. -8 D. 0 2. Suppose you earn $10 each hour you babysit. Which function describes the relationship between your total earnings E and the number of hours you babysit, h? A. E(h) = 10h B. E(h...
Monday, May 4, 2015 by Anne

Math
Sam shares $2 of her $12 dollar allowance every week. What fraction of her allowance does she share? 1/2 1/3 1/6 1/12
Monday, May 4, 2015 by Des

math 0312
The current in a stream moves at a speed of 9 mph. A boat travels 17 mi upstream and 17 mi downstream in a total time of 13 hrs. What is the speed of the boat in still water?
Monday, May 4, 2015 by Sara

math
dan loves fruit dan paid $4.53 for berries ,and $1325 for peaches with a $20 bill . how much change did dan received
Monday, May 4, 2015 by Shenika

Math 222
This is the second part to my first question A quadratic function Graph the function g(x) = 4 − x2, and state the domain and range. Solution We plot enough points to get the correct shape of the graph. See Fig. 11.10 for the graph. The domain is (−‡, &#...
Monday, May 4, 2015 by Tika-PLEASE HELP

Math 222
How do I graph this problem? g(x)= sqrt x-1
Monday, May 4, 2015 by Tika-PLEASE HELP

Math
Carmen and Susan are members of their school’s running club. The length of the circular track at the school is 1/10 of a mile. In the time it takes Carmen to run 3 times around the track, Susan runs 4 times around the track. A. In the time it takes Carmen to run 12 times ...
Monday, May 4, 2015 by Anonymous

Math
Andrew's dog Bubba has an exercise area behind the house. A stake in the ground has a 12 foot rope tied to it. The other end of the rope is fastened to Bubba's collar. If Bubba travels in a circular path around the stake. What is the largest Circumference allowed by ...
Monday, May 4, 2015 by Juliana

math
a recipe calls for 2/3 cups of chocolate chips, how many batches can be made with 6 cups of chocolate chips?
Monday, May 4, 2015 by Kate

math
Joe starts a gym. In the first year, 300 people join. If the membership grows at an annual rate of 4%, how many members will there be after 5 years?
Monday, May 4, 2015 by Anonymous

Math
1. A bag contains 9 tiles numbered 1 to 9. P(4) = (1 point) experimental; the result is found by repeating an experiment. experimental; the result is based on the number of possible outcomes. theoretical; the result is found by repeating an experiment. theoretical; the result ...
Monday, May 4, 2015 by Math Help

math functions
1. Find the next three terms in the sequence. 30,22,14,6… a. -3,-12,-21 b. -1.-8,-15 c. -1,-2, 3 d. -2,-10,-18 2. Write a rule for the sequence. 4,8,16,32,….. a.Start with 4, and multiply by 2 repeatedly. b.Start with 4, and add 8 repeatedly. c.Start with 4, and add ...
Monday, May 4, 2015 by Umacblackbelt

math
If you roll a pair of number cubes 50 times, what would be the experimental probability of P(odd and odd)
Monday, May 4, 2015 by Alyssa

math
A farmer has $5200 to spend on fencing to make a pen along a river. A local company tells the farmer that they can build the pen for $6.50/m. The manager suggests a pen in the shape of a right triangle with the hypotenuse along the river. What are the dimensions.
Monday, May 4, 2015 by lilly

math
1. A(-3;4) is a point on a circle with centre at the origin. a.determine the coordinates of B, if AB is a diameter. b. Show that point C(0;5) lies on this circle. c.show that ACB has a magnitude of 90degrees. 2.a.ddetermine the equation of the circle with AC as diameter, if A ...
Monday, May 4, 2015 by Anonymous

Math 222
This is the second part to my first question A quadratic function Graph the function g(x) = 4 − x2, and state the domain and range. Solution We plot enough points to get the correct shape of the graph. See Fig. 11.10 for the graph. The domain is (−‡, &#...
Monday, May 4, 2015 by Tika-PLEASE HELP

Math 222
How do I graph these two problems? y = −x2 g(x)= sqrt x-1
Monday, May 4, 2015 by Tika-PLEASE HELP

math
The side of a square is measured to be 16 ft with a possible error of ±0.1 ft. Use differentials to estimate the error in the calculated area. Include units in your answer.
Monday, May 4, 2015 by Anonymous

math
A new car is purchased for the price of $35,000. If the value of the car depreciates at a rate of 12% per year, when will the car be worth half of the original rate? I put down (this was wrong): 35000 (0.12/12) = 75000 350 (0.12/12) 175 = 612.5 = about 6 years
Monday, May 4, 2015 by Bri

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