Monday
August 29, 2016

Homework Help: Math

Branches of Math

Recent Math Questions

Math(Reiny Please Help)
An explosives company specializes in bringing down old buildings. The time it takes for a particular piece of flying debris to fall to the ground can be modelled by the function h(t)= -12(t+2)^2 + 120(t+2), where h is the height of the debris in metres and t is the time in ...
Tuesday, May 31, 2016 by Heaven

math
a tank is 3/5 full ofwater 50 litre more required to fill it up. how many litres can tank hold..?
Tuesday, May 31, 2016 by jia

Math
(4x^2 - 2x-1) - (-3x^3 + 2)
Tuesday, May 31, 2016 by Frank

MATH
1) A cube has a side length of 7 in. What is the volume of the cube? MY ANSWER:21 2) A cube has a side length of 14 meters. What is the volume of the cube? A. 2744 m3 B. 1176 m3 C. 168 m3 D. 42 m3 MY ANSWER: D
Tuesday, May 31, 2016 by Rochelle

Math
Tom's online class requires 10 tests, and he needs to score 70 or higher to pass the class. He took 9 tests so far and his average is 68. What is the lowest score on the last test that will let him pass the course?
Tuesday, May 31, 2016 by Sam

math
A standard number cube with the numbers 1 through 6 is rolled. Find the probability of rolling a number greater than 4
Tuesday, May 31, 2016 by jook

math
The value of y is inversely proportional to the value of x. When y=42 x=6. What is the value of y when x=9
Tuesday, May 31, 2016 by Claire

Math ---HELP!!!!!
30% of the fifth grade students in a large school district read below grade level. The distribution of sample proportions of samples of 100 students from this population is normal with a mean of 0.30 and a standard deviation of 0.045. Suppose that you select a sample of 100 ...
Tuesday, May 31, 2016 by angela

Math
need help!!!!!!
Tuesday, May 31, 2016 by E

Math
At 10x10 grid can be used to represent hundredths. It can also represent percents. The world percent(%) means out of one hundred. For example, 50% means 50 out of one hundred. Step 1 Use a 10x10 grid to model the percent of tiles in the mosaic that are green. Step 2 In the ...
Tuesday, May 31, 2016 by Queeni

Math
Jackie is using 1-inch tiles to make the mosaic shown at the right. She needs a total of 100 tiles. What percent of the tiles are green? What do you know? What do you need to find?
Tuesday, May 31, 2016 by Queeni

Math
A rotating water sprinkler can spray water a distance of 15m. What area of grass can the sprinkler cover?
Tuesday, May 31, 2016 by Jill

math plz help ;-;
What is the y-coordinate of the y-intercept of the linear equation 2x - 3y = 12? Plz help I don't understand how to do this can you show me step by step plz, sorry ;-;
Tuesday, May 31, 2016 by leo

MATH
The decimal 4.25 is between which two integers? A. between -2 and +4 B. between -1 and +3 C. between -1 and +4 D. between -1 and +5
Tuesday, May 31, 2016 by Gracy

math
Find the cost of 3 notebooks and 1 magazine in terms of y, if the cost of 1 notebook is 2y and that of 1 magazine is (y+3) ?
Tuesday, May 31, 2016 by jasmine

math plz help ;-;
What is the equation of the line containing the two points (-4, 8) and (1, -7)? a.y=-3x b.y=3x+4 c.-3y=x-4 d.y=-3x-4 plz check if my answer is correct. My answer is c ^^;
Tuesday, May 31, 2016 by leo

Math
Anand bought a total of 30 white and brown pens for a total of Rs 32. The cost of each white pen is 70 paise more than the cost of each brown pen. Which of the following represents a possible value of the cost of each brown pen(in paise)?
Tuesday, May 31, 2016 by Anosh

Math - Vectors
Let the points A = (−1, −2, 0), B = (−2, 0, −1), C = (0, −1, −1) be the vertices of a triangle. (a) Write down the vectors u=AB (vector), v=BC(vector) and w=AC(vector) (b) Find a vector n that is orthogonal to both u and v. (c) Find a ...
Tuesday, May 31, 2016 by Drake

Math - Year 10 - Probability
A letter A, B or C is drawn from a hat and a random number that is either odd or even is obtained from a calculator. Can this question be solved? On a dot diagram or how can i represent this?
Tuesday, May 31, 2016 by ChaChing$

math help
which measure correctly completes the statement. 1,127.5 milligrams = ? grams (1 point)
Tuesday, May 31, 2016 by larry

Math
Me my friend have equal amount of collector cards. How many cards me and my friend have altgether
Tuesday, May 31, 2016 by Liyu

math plz check ;-;
Choose the correct graph for the linear equation 2x - 3y = 12. a.y=-3x b.y=3x+4 c.-3y=x-4 d.y=-3x-4 plz check if my answer is correct. My answer is c ^^;
Tuesday, May 31, 2016 by leo

Math
you accept a job with a salary of $35000 for the first year. suppose during the next 39 years you get a 5% raise each year. What is your total compensation if you work for a total of 40 years?
Monday, May 30, 2016 by Ginger

math
A boy wants to chop a log of wood into 10pieces.he takes 10 minutrs to cut one piece.how much time will he take to chop all 10 pieces
Monday, May 30, 2016 by mitali

math
for a triangular prism, the areas of the lateral faces are 18in^2, 26in^2 and 34in^2. if the area of the base is 16in^2, find the total area of the prism.
Monday, May 30, 2016 by kenzi

Math (Calculus)
Find the positive value of the parameter t corresponding to a point on the curve parametrized by {x= t^2 +3 ; y=t^2+t for which the tangent line passes through the origin. I tried with 2t+3 and 2t+1 but it isn't successful
Monday, May 30, 2016 by Anonymous

math
<TVY is congruent to <Z. also, TV=6, XZ=10 and YT=8. find TX.
Monday, May 30, 2016 by kenzi

Math Calculus I
let f(x)= 6sin(x)/(2sin(x)+6cos(x)) The equation of the tangent line to y= f(x) at a= pi/6 can be written in tthe form y=mx+b where m=? b=? I found the f': (9*(cos^2(x)+sin^2(x)))/(3cos(x)+sin(x))​^2 but i dont know how to fill it into the form. Can anyone help me? ...
Monday, May 30, 2016 by Anonymous

math
From an external point E, tangents ES and ET are drawn to circle O. if m<E=78°, find the measure of minor arc ST.
Monday, May 30, 2016 by kenzi

Math - volume about y axis
Find the volume generated by revolving the region enclosed above by the x-axis and the graph of the function f(x) = x^2 -1 about the y-axis. I cant make sense of it. What is it asking me to do? What are the integral bounds?
Monday, May 30, 2016 by Rob

Math ---HELP!!!!!
A researcher wishes to estimate the mean amount of money spent per month on food by households in a certain neighborhood. She desires a margin of error of $30. Past studies suggest that a population standard deviation of $248 is reasonable. Estimate the minimum sample size ...
Monday, May 30, 2016 by angela

Math..help
Multiply: (3a-(7/9))(3a-(7/9))
Monday, May 30, 2016 by Duran

Math ---HELP!!!!!
sample of nine students is selected from among the students taking a particular exam. The nine students were asked how much time they had spent studying for the exam and the responses (in hours) were as follows: 18, 7, 10, 13, 12, 16, 5, 20, 21 Estimate the mean study time of...
Monday, May 30, 2016 by angela

Math (Polar to Cartesian Equations)
Convert the given polar equation to a Cartesian equation. r^2=4sec(theta)csc(theta)
Monday, May 30, 2016 by Giovanni

math
You deposit $400 in a savings account that earns 7% interest compounded annually. What is the function that represents your balance after t years?
Monday, May 30, 2016 by Katie

Math help!
5. Replace the ___ with <, >, or = to make a true statement. 7^4/7^2____ 49 < <--------------- > = none of the above multiply the following polynomials. 6. –2r(8r + 5) –16r^2 + 5 <-------------- –16r^2 + 10 –16r^2 – 10r –16r^2 &#...
Monday, May 30, 2016 by Kate

math
in circle p, chord cd is 12 inches long and measure of arc cd=90°, find the exact area of the segment bounded by chord cd and arc cd.
Monday, May 30, 2016 by kenzi

Math
For questions 3 and 4, simplify each expression. 1. 4^4/4^6 -16 16 1/16 <----------------- -1/16 2. 5^0 0 <------------- 5 1 –5
Monday, May 30, 2016 by Annie

Math
Write each expression using a single exponent 1. x^9/x^2 a)x^11 b)x^7 <-------------- c)7 d)x^5 2. h^14/h^5 a)h^-9 b)1/h^9 c)h^19 d)h^9 <-----------------
Monday, May 30, 2016 by Annie

Math ---HELP!!!!!
A bag contains 4 red marbles, 3 blue marbles, and 7 green marbles. If a marble is randomly selected from the bag, what is the probability that it is blue? A. 2/11 B. 3/11 C. 5/14 D. 3/14 D
Monday, May 30, 2016 by angela

math plz help ;-;
Solve the following equation: -2(x-3)+4=8x-20 please help me how to do this step by step plz i do understand how to do this, sorry ;-; And thank you for the ones the helped me with the other Q :D
Monday, May 30, 2016 by leo

Math(PleaseHelpAssignmentDueToday)
Determine the y intercept of the graph of y=5x^2 + 7x+ 11
Monday, May 30, 2016 by Heaven

Math
The football team is on the 30-yd line and has 4 plays to make a rst down. To make a rst down, the team must advance the ball 10 yd. On the rst play, they lost 4 yd. On the second play, they gained 8 yd. On the third play, they lost 2 yd. How many more yards do the players ...
Monday, May 30, 2016 by Carey

math
Skip is practicing tennis serves against a wall. The distance between Skip and the tennis ball, in feet, at any time T, measured in seconds, is D(T)=-1.5|T-8|+9. which analysis of the formula is true? A. Skip is 9 feet from the wall and the ball will return to him in 1.5 ...
Monday, May 30, 2016 by stefan

Math
Lisa and Katie are playing a card game, and a total of 900 points has been scored. Lisa scored 400 more points than Katie. If you let l= l= the number of points that Lisa scored, and k= k= the number of points that Katie scored, then the problem can be represented by the system:
Monday, May 30, 2016 by Andy

math
the length of a rectangular garden is 4m more than its width determine the gardens width if the area is 117m^2
Monday, May 30, 2016 by jay

Math and science
How far apart are these two buildings?
Monday, May 30, 2016 by Lebo

Math
Where are the brackets supposed to be in this equatin 20-8÷2+6 to give 1. 5 as the answer.
Monday, May 30, 2016 by Hailey

Math
Kim throws her basketball up from the ground toward the basketball hoop from a distance of 20 feet away from the hoop. The ball follows a parabolic path and returns back to the gym floor 5 feet from the hoop. Write one possible equation to represent the path of the basketball...
Monday, May 30, 2016 by Harpreet

Math
There were 240 children in a school.60%of them were girls. How many girls were in the school
Monday, May 30, 2016 by Doireann

math
Hi, I have been trying to figure this one math problem for awhile and I am stuck. I believe the answer is between A or B. Skip is practicing tennis serves against a wall. The distance between Skip and the tennis ball, in feet, at any time T, measured in seconds, is D(T)=-1.5(T...
Monday, May 30, 2016 by Julia

Math
1. If you roll a number 52 times; how many times can you expect to roll a number 4? I do not understand Probability and a GEM test is coming up Thursday Please Help!!!!!!!!!!!!!!!!!!!!!!!!!!!!
Monday, May 30, 2016 by Sam

Math
Many has two boxes one contains 10 colored pencils 4 of witch are red and 6 which are green the other box onther box contains 7 markers and which 4 are red and 3 are blue what's the probability of of many choosing green green pencil and red marker
Monday, May 30, 2016 by Frank

math
The road from the town of Wolford to the village of Abbotshead is measured as 5.8 cm on a map. If the scale of the map is 1:50 000, calculate the real distance between the 2 places in km
Monday, May 30, 2016 by Nikki

Math (pre-celc 12)
Write the expression as a single logarithm: 3log(a)-log(b)-(1/2)log(c) I want to check my answer. I got log(a^3/bc^(1/2))
Monday, May 30, 2016 by Jana

algebra 1
NEED HELP!!Hi, I have been trying to figure this one math problem for awhile and I am stuck. I believe the answer is between A or B. Skip is practicing tennis serves against a wall. The distance between Skip and the tennis ball, in feet, at any time T, measured in seconds, is ...
Monday, May 30, 2016 by david

Math
1. Identify the following functions as linear or nonlinear: xy = -9 y = 3x x + 7 = y y = x - 4 y = x^2 x + y - 20 = 2x 1/2x = y y = 5/x y = 30 - x^2 thank you
Monday, May 30, 2016 by I NEED HELP MS SUE

Math
Hi, I have been trying to figure this one math problem for awhile and I am stuck. I believe the answer is between A or B. Skip is practicing tennis serves against a wall. The distance between Skip and the tennis ball, in feet, at any time T, measured in seconds, is D(T)=-1.5(T...
Monday, May 30, 2016 by Ann Mori

Math
P, Q, R, are arranged sticks. P is 10km north of Q. The bearing of R from P is 223, and the bearing of Q from R is 097 find the distance of R from P
Monday, May 30, 2016 by Anonymous

math, science etc
T=(pq/r)-rq make q subject of formula
Monday, May 30, 2016 by muhammed Darboe

Math
12 ounce can of Coke and 8 ounce carton of apple juice. She drank all of the Coke and only 1/2 of the apple juice. There are 30 ml in each ounce of liquid. How many ml did Mrs. Heath drink?
Monday, May 30, 2016 by Anonymous

Math
1. Which of the following sample spaces correctly lists all the possible outcomes for flipping a coin and spinning a four-colored spinner (red, blue, green, and yellow)? A. H-red, H-blue, H-green, H-yellow, T-yellow, T-green, T-blue, T-red ***** My Answer B. H-red, T-red, H- ...
Monday, May 30, 2016 by Sam

Math
Lina is now 5 times as old as Bob, but 7 years from now, she will be 3 times as old as he will be then. How old is Lina now?
Monday, May 30, 2016 by Xtian Zhou

Math
Solve the equation e^x-10=10. Do I have to change it to log form? What do I do after that?
Monday, May 30, 2016 by Cheezel

Math
A paper cone has a base diameter of 8cm and a height of 3cm(a) use Pythagoras theorem to calculate it's slant height (b)if the cone is cut and opened out into the sector of a circle what is the angel of the sector
Monday, May 30, 2016 by Joy

math
(25)^-1/3 × 3√16
Monday, May 30, 2016 by Anonymous

math plz help ;-;
1. Solve the system by any method: 2x-5y=-1 2x-y=1 How many solutions does the system of equations below have? Explain your answer. y=3/5x-1 y=6/10x+3 plz help me ;-; i dont understand how to do this, sorry ;-;
Monday, May 30, 2016 by leo

Math
At a point p 20m away from the foot of the tower, the angle of elevation of the point p is 45.calculate the height of the tower.
Monday, May 30, 2016 by Israel David enesi

math
Write this in scientific notation. (1.4*10^1)(8*10^4) a)9.4*10^4***** b)9.4*10^5 c)1.12*10^5 d)1.12*10^6 Please cheek my answer i am not sure if I am right or wrong.
Sunday, May 29, 2016 by Jess

Math
I have a square house that has 1130 square feet, what is the dimension?
Sunday, May 29, 2016 by Lynn

Math - integrals
Use the sub x-1 = sqrt(5)tan(u) to evaluate 5∫3 1/(x^2-2x+6)^3/2 I dont know how to use the substitution
Sunday, May 29, 2016 by Rob

Math.........
Prove the following conjecture: Between any two unique Real Numbers, there exists another Real Number.
Sunday, May 29, 2016 by Heaven

math
Given that triangle ABC is congruent to triangle RST, AB=x, BC=x+2, AC=x+4 and RS=2x-7, find the perimeter for triangle ABC.
Sunday, May 29, 2016 by kenzi

math
a snail moves along the edge of a triangular lawn ABC from A back to A . The distance AB was done 15mins, BC in 25 mins and it took the snail 40 mins to do CA. What was the average speed of the snail in centimeters per second?
Sunday, May 29, 2016 by ralph

math
use dominance to slove the game with following pay-off matrices: ((2 3 1/2) (3/2 2 0) (1/2 1 1)). ANS: A=(1/4,0,3/4); B=(1/4,0,3/4); v=7/8. i got answer, but how to do this? i need solution
Sunday, May 29, 2016 by priya

math
slove the game with following pay-off 3*3 matrices:((2,3,1/2)(3/2,2,0)(1/2,1,1))
Sunday, May 29, 2016 by priya

Math (pre-celc 12)
Find x: 2(5)^x=3^(x+1) I'm not sure what to do with the 2. I think I need to write the equation as log5^2x=log3^(x+1), but I don't know. Thanks
Sunday, May 29, 2016 by Jana

Math(Please Help!)
An undisclosed number of friends gather for dinner. Each person shakes each other persons hand exactly once. How many handshakes occur? Piti reasons that 2 people will have one handshake. For each person added, everyone in the earlier group will need to shake the new persons ...
Sunday, May 29, 2016 by Heaven

Basic math for science
A sportswear manufacture determines that the marginal cost of producing x worm-up suits is given in dollars by 20-0.015x.if the cost of producing one suits is $25,find the cost function and the cost of producing 50 suits and 100 suits
Sunday, May 29, 2016 by Rose

Math
Use the clues To find the Mistery Number. The number os less than 800 and greater Than 780. It has 8 more tens than ones
Sunday, May 29, 2016 by Mirella

Math word
General tickets sell for $6 and adult $9. Sell at most 300 general and at most 500 adult. Costs $1 to advertise for adult and $.50 to advertise student. Have at most $400 for advertising. What is most profit that can be made?
Sunday, May 29, 2016 by Math reread please

Math
How much should a girl go to 4th weigh?
Sunday, May 29, 2016 by Tyra

Math word
General tickets sell for $6 and adult $9. Sell at most 300 general and at most 500 adult. Costs $1 to advertise for adult and $.50 to advertise student. Have at most $400 for advertising. What is most profit that can be made?
Sunday, May 29, 2016 by Math reread please

Math- Prob Stat
The probability that a student in this school has a job is 65%. What is the probability that: A. You ask at least 8 people before you find someone with a job? B. You ask at most 4 people before you find someone with a job? C. Between 15 and 29 people in a group of 50 will have...
Sunday, May 29, 2016 by Kate

Math
There are a total of 103 foreign language students in a high school where they offer Spanish, French, and German. There are 29 students who take at least 2 languages at once. If there are 40 Spanish students, 42 French students, and 46 German students, how many students take ...
Sunday, May 29, 2016 by Jun

Math
When two-fifths of a number is increased by 15 the result is 27. What is the number?
Sunday, May 29, 2016 by Jill

Math
The sum of 3 consecutive odd natural numbers is 69. Find the prime number out of these numbers.
Sunday, May 29, 2016 by Srishti

Math
A man 1.5m tall is 23.5 meters away from a tower of height 25m.from his eyes,find the angle of elevation of the top of the tower
Saturday, May 28, 2016 by Raghag pagare

math
you deposited taka 100000a bank 10years ago what is the present value investment at 10% compoundend monthly
Saturday, May 28, 2016 by md asad

math
Find the imaginary part of (cos(12) + i sin(12) + cos(48) + i sin(48))^6.
Saturday, May 28, 2016 by Katie

Math- Prob Stat
How do you determine if a raffle or casino game is fair?
Saturday, May 28, 2016 by Kate

math
Find mean, variance from the understated data, age 30-38,39-47,48-56,57-65,66-74,75-83,84-9​2,no of student :10, 12, 24,30,14,6,4
Saturday, May 28, 2016 by Ejelonu Amarachi Cynthia

business math
A truck costs $35,000 with a residual value of $2,000. Its service life is five years. Using the declining-balance method at twice the straight-line rate, the book value at the end of 2 years is?
Saturday, May 28, 2016 by lawand

Math
Evaluate (6.3 × 10^6) ÷ (9 × 10^2)
Saturday, May 28, 2016 by Munashe

Math
How do I use the distributive property to rewrite the math problem 5(4 - y?
Saturday, May 28, 2016 by Taylor

Math
average score of first three test is 90 and average score of two test is 89 what is average score of all five tests
Saturday, May 28, 2016 by Muhammad Aleem

math
the difference between the sum of the two numbers and the difference of the two numbers is 6.Find the larger of the two numbers if their product is 15
Saturday, May 28, 2016 by Sifat

Math
Find the ratio of the volume of two cubes whose sides are 2.6 cm and 3.4cm
Saturday, May 28, 2016 by Adi

math
A fraction becomes 1/2 if 5 is subtracted from its numerator and 3 is subtracted from its denominator. However,if we divide the numerator by 2 and add 7 to the denominator,the fraction becomes 1/4. Find the fraction.
Saturday, May 28, 2016 by Alllen Justy

math
A store owner complains that, on the average, 3 bottles per case of a certain brand of softdrink are underfilled. Assuming this is correct, find the probability that a randomly chosen case of this drink will contain at least 4 underfilled bottles.
Friday, May 27, 2016 by Help Me :'(

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