Friday
December 9, 2016

# Posts by math

Total # Posts: 391

Algebra 1
Suppose y varies directly with x, and y=25 when x=-140. What is the value of y when x=36 A)140 B)165 C)201.6***** D)176
December 6, 2016

Emma
Solve (?6+i)(?6-1)
November 27, 2016

pre calc
You have a sample of a certain radioactive substance. After two days, thirty percent of the sample has decayed. What is the half-life of the material and how much will have decayed after a week?
November 22, 2016

physics
An ideal gas has the following initial conditions: Vi = 490 cm3, Pi = 5 atm, and Ti = 100°C. What is its final temperature if the pressure is reduced to 1 atm and the volume expands to 1000 cm3?
November 7, 2016

November 3, 2016

Plane Trigonometry
tan A=-4/5;A in Quadrant 2 and cos B=-5/13: B in Quadrant 3. What is the exact value of the expression cos(A+B)?
November 2, 2016

physics
Given that the carbon atom has a mass of 12 amu, how many carbon atoms are there in a diamond with a mass of 8 g? ....atoms
November 2, 2016

math
No idea
October 29, 2016

math
Find the value of K so that x^2-5x+k=0 has one root equal to 4.
October 29, 2016

Math
A glass containing 250 mL of 80% iodine solution tips over spelling part of its contents. This subsequently replaced by an amount from a mixture of 40% iodine. If a 72% solution is resulted, how much was spilled?
October 28, 2016

Math
How many kg of pure salt must be added to 8 kg of a 30% solution to obtain a 35% soltution?
October 28, 2016

Aria
If a projectile is shot vertically upward from the ground with an initial velocity of 100 ft per sec, neglecting air resistance, its height s (in feet) above the ground t seconds after projection is given by s= -16t^2 + 100t a) After how many seconds will it be 50ft above the ...
October 26, 2016

pre-calc
|2x+1| greater than or equal to |x-3|
October 11, 2016

Pre-calc
I trust Steve
October 11, 2016

Pre-calc
Alice walks on a straight line at four miles per hour. Two hours after she begins walking, Bob runs after her at a rate of six miles per hour. How fast (in miles per hour) is Bob gaining on Alice?
October 11, 2016

pre-calc
Alice walks on a straight line at four miles per hour. Two hours after she begins walking, Bob runs after her at a rate of six miles per hour. How fast (in miles per hour) is Bob gaining on Alice?
October 10, 2016

pre-calc
Alice walks on a straight line at four miles per hour. Two hours after she begins walking, Bob runs after her at a rate of six miles per hour. How fast (in miles per hour) is Bob gaining on Alice?
October 10, 2016

pre-calc
We use the same polynomials as in the first question. Suppose that 3x^3 + 2x + 1 = (ax^2 + bx + c)(x+2) + d. Then b is equal to:
October 10, 2016

Pre-Calc
A force, F, on a body of mass m causes the body to accelerate. Denote the acceleration of the body by a. The relationship between force, mass, and acceleration is F = ma. If we take the unit of mass to be a kilogram, the unit of distance to be a meter, and the unit of time to ...
September 30, 2016

pre-calc
The force, F, between two bodies of mass m1 kilograms and m2 kilograms whose centers of mass are a distance of r meters apart is given by the formula F = (Gm1m2)/ r2 where G is the gravitational constant of the universe. What are the units of the gravitational constant G?
September 30, 2016

pre-calc
The radius of the earth is approximately 4,000 miles. The acceleration due to gravity is approximately 32 feet per square second. The mass of the earth is approximately 6 × 10^24 kilograms. Calculate the value of G in units of kilograms, meters, and seconds.
September 30, 2016

Math
In a particular​ year, a total of 63,172 students studied in two of the most popular host countries when traveling abroad. If 7306 more students studied in the most popular host country than in the second most popular host​ country, find how many students studied ...
September 27, 2016

Pre-calc
Problem 1. Suppose x > 0. Simplify the expression [(x+h)^1/2− (x) ^1/2]/h . For what values of h is this expression defined?
September 26, 2016

Math
Alice paints at a rate of 10 square feet per minute and Bob paints at a rate of 8 square feet per minute. If they work together, how many square feet can they paint per minute?
September 25, 2016

Math
Write out the full question please
September 21, 2016

jay
The formula for the perimeter of a rectangle is P=2(l+w)P=2(l+w). Solve for w. w=2P−lw=2P−l w=p2−lw=p2−l w=p−l2w=p−l2 w=P2+l D?
September 21, 2016

math
54, 63 , 72
September 21, 2016

jay
For a trapezoid, the following formula relates the area A, the two bases a and b, and the height h. A=(a+b)2hA=(a+b)2h Solve for a. a=2Ah+ba=2Ah+b a=2A−bha=2A−bh a=2Ah−ba=2Ah−b a=Ah2−b
September 21, 2016

lin
the product of the factors of 6
September 14, 2016

lola
how much bigger than -9 is -1
September 14, 2016

Math
I forgot to add that the boys and girls need to be in alternated seats
September 5, 2016

Math
If there are 5 boys and 7girls, in how many ways can 5 boys and 5girls sit in a round table? Is the ans : 5!*4!*7c5? Reason: since there are 5 boys so (5-1)! And left 5 seats for girls so 7c5 and within the girls theres 5 diffrent ones so another 5!
September 5, 2016

maths
Different ways of arranging 72 books in equal piles
August 25, 2016

lauren
​\$6300 is​ invested, part of it at 11​% and part of it at 77​%. For a certain​ year, the total yield is ​\$565.00. How much was invested at each​ rate? how much was invested at 11% and 7%? thank you
August 25, 2016

Ap series
Sum of first six term of an ap is 46 ratio of its 10th term to that of 30th term is 1:3. Find its 13th term
August 2, 2016

mathematics
a1=1 ,an=3an-1+2 for n>2
July 17, 2016

math
6 red balls and 5white total 20balls how many yellow balls find probility
July 9, 2016

Maths Year 10
Q) the difference between two numbers is 5. A) if the larger number is k, what is the other number? B) write a simplified expression for the product of both numbers. ??? ty in adv.
June 25, 2016

It's nothing. Because it's impossible. Lol so easy.
June 2, 2016

Math
Make a table and graph each quadratic function. Use integers from -3 to 3 for inputs. #4- y= -x2 #5- y=2x squared #6- y= -8x squared #7- y= x squared + 2 Make a table and a graph for each function. Use only positive values for x. #10- y= 10/x #11- y= 8/x Write a quadratic ...
May 11, 2016

Math
In a piggy bank Jane has 8 more quarters than dimes and she has 5 less nickels than dimes. Write an algebraic expression
May 9, 2016

Math
A only sixty percent of the people chose baseball B the reporter only talked to people at the baseball game C only the people that the reporter talked to counted D the reporter did not say what sport other people chose
May 9, 2016

Math
In a piggy bank Jane has 8 more quarters than dimes and she has 5 less nickels than dimes. Write an algebraic expression
May 9, 2016

Semia
A circular sinkhole has a circumference of 75.36 meters. A week later, it has a circumference of 150.42 meters. a. Estimate the diameter of the sinkhole each week. The sinkhole is about ? meters the first week. The sinkhole is about ? meters the second week. b. How many times ...
May 7, 2016

An art teacher had a total of t markers. He gave an equal number of markers to each of 18 students and had 16 markers left over. Which equation could be used to find n , the number of markers each student received? A t = 18n B t = 34n C t = 18n + 16 D t = 16n + 18 Please show ...
April 27, 2016

math
a die is rolled in such a way that even faces are twice as likely to occur as the odd faces. what is the probability that a prime number shows up when rolled?
April 26, 2016

algebra
There are 6 students in a club. For a certain activity, 4 of the students need to form a separate group. How many ways can this group of 4 students be formed?
April 20, 2016

Write in terms of cos and sin function. cotx*secx I know cotx = cosx/sinx and sec x= 1/cos x. but how do i solve it?
April 18, 2016

Math
Thanks.
April 8, 2016

Math
Ms. Vellake loves to read. She read 522 hours in 29 weeks. If she read an equal number of hours each week, how many hours did she read each week?
April 8, 2016

Math
Using the table of values -2,-1,0,1,2, what would be the "Y" when given these set of equations? y= 3^ y= 2 ^ y = (1/2)^ the ^ is a tiny letter x exponent that we sub in with the table of values
March 31, 2016

math
The ratio of the ages of ramu and his sister is 3:4 . If the age of his sister is 36,how old is ramu?
March 29, 2016

math
97 - 88 = 9 9 + 88 = 97
March 21, 2016

Math
Use equal intervals to make a frequency table for the average number of movies per person. You do not need to show tally marks. Country Average Number of Movies Turkey 0.5 Japan 1.2 UK 1.3 Finland 1.3 Austria 1.5 Germany 1.8 Spain 2.2 Sweden 2.2 Denmark 2.2 Switzerland 2.5 ...
March 12, 2016

Analytical Geometry
1) How do you create a fractal? 2) How are midpoints,lengths,equations for circles used to generate the fractal (pattern in pinecone). 3) What are some special features of this fractal (pattern in pinecone)? Describe a specific application of fractals, such as a scientific ...
March 9, 2016

Math
A parking garage is changing its parking fees for a week long festival. The function below represents the cost to park in the garage as a function of time (days into the festival). Piece wise c(t) = 10; 0 <= t <= 2 10; 2 < t <= 5 7; 5 < t <= 7 a) What would ...
March 8, 2016

Algebra 1
There are 8 boys on a bus. Each boy has 8 backpacks. In each backpack, there are 8 big dogs. For every big dog there are 8 little dogs. How many legs are there in the bus?
February 19, 2016

Math
Find the inverses of each of the functions below algebraically. a.3y+5x=18 b.h(t)=−4.9(t+3)^2+45.8
February 3, 2016

Math
Find the inverses of each of the functions below algebraically. a.3y+5x=18 b.h(t)=−4.9(t+3)^2+45.8
February 3, 2016

Sam E
Let v(t)=t^2−3t be the velocity, in feet per second, of an object at time t , in seconds. (c) What is the meaning of the quantity v(4)? Select all that apply if more than one statement is correct. A. In how many seconds will the object have moved 4 ft. B. The object'...
January 28, 2016

Math
How do you do 4ln(2x+3)=11
January 27, 2016

math
find the area of right traingle of base 1.2m and hypotenuse 3.7.
January 9, 2016

probability distribution
A bag contains Six blue and 4 red balls ,3 balls are drawn at random with replacement what is expected no of red balls that can be drawn?
December 13, 2015

geet
in 1996, sharon that spent 189 days in space that is longer than another astronaut. how many weeks was she in the space .
December 13, 2015

math
how many different numbers of 8 digits can be formed from the digits 0,1,2,3,4,5,6,7 that are divisible by 5?
December 2, 2015

optional math
In the given figure, ABCD is a trapezium where AB // DC. P & Q are the midpoints of AC & BD. Prove that: Vector PQ= 1/2(Vector AB - Vector DC).
October 10, 2015

Algebra
If the angles of triangle are in the ratio of4:1:1then find the ratio in the smallest side / perimeter of the tringle
October 4, 2015

algebra
ITS SO OBVIOS ITS -2.1 BECAUSE THE MATHEMATICAL GANJA EQUATION HELPS. THE BEST ANSWER IS OBV THAT BC 3248.,123
August 12, 2015

co-ordinate
Please help me to solve this:find the equation to the circle circumscribing the quadrilateral formed by the straight lines, 2x 3y=2, 3x-2y=4, x 2y=3 and 2x-y=3
July 25, 2015

Finance
You have a balance of \$12,000 for your tuition on your credit card and you make no further charges. If your APR is 16.7% and each month you make only the minimum payment of 2% of your balance, then find a formula for the balance after t monthly payments. A. 12,000(0.966362)t B...
June 28, 2015

Finance
Assume that you have a balance of \$5000 on your Visa credit card and that you make no more charges. If your APR is 22% and each month you make only the minimum payment of 3% of your balance, then find a formula for the balance after t monthly payments. A. 5000(0.987783)t B. ...
June 28, 2015

Finance
You have a balance of \$7500 on your credit card and you make no further charges. If your APR is 12.5% and each month you make only the minimum payment of 5% of your balance, then find a formula for the balance after t monthly payments. A) 7500(0.959896) t B) 7500(0.940104) t C...
June 28, 2015

Math
10. Suppose the stock of Microsoft increases in value by \$5 per share. If all other Dow stock prices remain unchanged, how does this affect the DJIA? A) 37.80 points up B) 30.24 points up C) 22.68 points up D) 15.12 points up
June 28, 2015

Math
The rate of inflation in Ethiopia was 41% in 2008. What was the percentage decrease that year in the buying power of the birr (the currency of Ethiopia)? A. 41.0% B. 69.5% C. 29.1% D. 37.5%
June 28, 2015

Math
Two cards. Refers to choosing two cards. If you do not put the first card back in the deck before you draw the next, what is the probability that the first card is a club and the second card is a diamond? Leave your answer as a fraction in SIMPLEST form. The probability that ...
June 28, 2015

Math
I got 518400 but it's considered wrong.
June 28, 2015

Math
Signals The king has 10 (different) colored flags that he uses to send coded messages to his general in the field. For example, red-blue-green might mean “attack at dawn” and blue-green-red may mean “retreat.” He sends the message by arranging three of the ...
June 28, 2015

Math
On Halloween, a man presents a child with a bowl containing six different pieces of candy and six different pieces of gum. He tells her that she may have four of each. How many choices does she have? Answer as a whole number.
June 28, 2015

Math
Assume a box contains three red jelly beans and two green ones. We consider the event that a red bean is drawn. Suppose I pick a jelly bean from the box without looking. I record the color but do not put the bean back in the box. Then I choose a bean again. What is the ...
June 28, 2015

An engineer sees that the angle of elevation to a vertical tower is 45 degrees. When he moves 40 feet closer to the tower on the same straight, level path, he sees that the angle of elevation becomes 55 degrees. How tall is the tower?
May 30, 2015

Math
In a bag M&M's, the probability of choosing a yellow m&m is 1/5. In a bag of skittles, the probability of choosing red is 1/4. What is the probability of choosing a yellow m&m and a red skittle??
May 14, 2015

math
In a camp ,there is a meal for 120 men or 200 children . if 150 children have taken the meal, how many men will be catered to with remaining meal
May 11, 2015

chev
given A(a,2) B(3,4) and C(-2,1). if A is at the same distance to the points B and C. Find a
May 1, 2015

math
I need help with two questions,. they both have attachments. is there another program where someone can come on and help me
March 29, 2015

Math
Will I think
March 23, 2015

algebra
Your ribbon is 78 inch wide. Your friend's ribbon is 58 inch wide. How much wider is the ribbon you are using?
March 11, 2015

math
x + 3 + 2X =X+3 can someone help with this?
February 19, 2015

algebra
Thank you Miss Sue i entered the wrong question?
February 19, 2015

algebra
i need help can someone explain how to do this X+3+2x=X+35X what is the answer or can someone help me?
February 19, 2015

math
Two station astronauts will each perform three 8-hour EVAs within 13 days to repair a damaged solar panel that was impacted by a micrometeoroid on the space station. What is the total amount of oxygen needed by the two astronauts to accomplish this? Please put your answer in ...
January 29, 2015

MNHS_HELP
Tnx... But where did exponent 4 and minus one come from?
January 8, 2015

MNHS_HELP
How many positive factors does 62x(63^3+63^2+63+1)+1 have? (With explanatio pls... Tnx)
January 8, 2015

MNHS_HELP
What is the least number of square pieces into which a cardboard, 13 ft long 8 ft wide, can be cut?
January 8, 2015

math
the area of an equilateral triangle is given by the expression s^2 x square root of 3/4, where s is the side length of the triangle. what is the area of the triangle? round to the nearest tenth the triangle is 5 cm on all three sides.
December 26, 2014

algebra
the sum of the least and greatest integer is 35 more than the middle integer
December 18, 2014

Math
solve 7 1/2 - 3 5/6
December 7, 2014

Math
how many fractions between 1/4 and 1/2
December 3, 2014

Math
About how many days does it take for your heart to beat one million times.
October 13, 2014

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