Monday
September 26, 2016

Homework Help: Math

Branches of Math

Recent Math Questions

math
a certain store sells two types of pen: one type for rs. 2 per pen and the other type for rs. 3 per pen. if a customer can spend up to rs. 25 to buy pens at the store, what is the greatest number of pens the customer can buy
Saturday, July 23, 2016 by sh

math
after reducing the price by 20%, a calculators new price is $10. the original selling price of the calculator was?
Saturday, July 23, 2016 by sh

math
on a radio tower, a red light flashes every 6 seconds and a blue light flashes every 10 seconds. if both lights flash together at a certain time, how many seconds later will both lights flash together the next time
Saturday, July 23, 2016 by sh

math
two employees X and Y are paid a total of rs. 550 per week by their employer. if X is paid 120 percent of the amount paid to Y, how much is Y paid per week
Saturday, July 23, 2016 by sh

math
the length of a rectangle is increased by 25%. by what percentage should the width be decreased so that the area of the rectangle remains unchanged
Saturday, July 23, 2016 by sh

Math
Two software companies are developing new android apps. The average profit per x hundred downloads earned by each company can be modelled by the rational functions below, where x > or equal to 0. Trance Media: G(x)=80x+150/x Ellen's incorporated: B(x)=35x+600/x How many...
Saturday, July 23, 2016 by angelina

Math
For a certain day, the depth of water, h, in metres in Tofino, B.C at time t, in hours, is given by the formula: h(t)=7.8+3.5sin[pi/6(t-3)], tE[0,24]. Assume t=0 represents midnight. Provide an algebraic solution to determine the time(s) of day, the water reaches the depth of ...
Saturday, July 23, 2016 by Aidan

Math
Solve the equation using exact values. Check for any extraneous roots. 9^2x+4(9^x)=21.
Saturday, July 23, 2016 by andre

Math
Jessica bought an antique candle holder for $300. The antique appreciates in value by 5.5% per year. When will the value of the candle holder by $3000? Round the answer to the nearest tenth.
Saturday, July 23, 2016 by ba

Math
The amount of active ingredient of medicine ingested by the body, A in milligrams, is a function of time, t, in hours, given by A(t)=5/8(12t-t^2). a)Determine the average rate of change of the amount of medicine ingested during each of the intervals below and compare the two ...
Saturday, July 23, 2016 by ba

math
find the capacity of an oil tank if an addition of 15 gallons raises the reading from 1/4 full to 5/8 full
Saturday, July 23, 2016 by sh

math
SAC held a spring fling. SAC provides the following formulas about the spring fling. 1. The number, N, of people who attend the park is a function of price, p, in dollars: 𝑁(𝑝) = −(𝑝 + 5)(𝑝 − 17) assuming the minimum ticket price is...
Saturday, July 23, 2016 by Sherry

math
3x+y=6/2x-y=1
Saturday, July 23, 2016 by Anonymous

math
An organizational psychologist measures levels of job satisfaction in a sample of 30 participants. To measure the variance of job satisfaction, it is calculated that the SS = 120 for this sample. What are the degrees of freedom for the variance? Compute the variance and ...
Saturday, July 23, 2016 by Misunderstood - Please help.

Math
One side of a rectangle is 2cm longer than the other side .its area is 195cmsquare .find its perimeter
Saturday, July 23, 2016 by Abdullah

math
the sum of two numbers is 25. the second number is 5 more than the other one. find the numbers.
Saturday, July 23, 2016 by joshua

Math
A watch loses five seconds every one hour How many minutes will it loss in two days
Saturday, July 23, 2016 by Isaac

Math - Trig
The depth of water, h, in metres at time t, in hours, is given by the formula: h(t)=7.8+3.5sin[pi/6(t−3)]. Its a 24 hours period and t=0 is midnight. Provide an algebraic solution to determine the time(s) of day, the water reaches the depth of 10.29 m i got one time 4.51...
Friday, July 22, 2016 by Sherry

Math
For a certain day,the depth of water,h, in metres in PEI, in hours is given by the formula:h(t) = 7.8 + sin3.5 (pi/6(t-3)), t E [0,24], assume t=0 represents midnight. Provide an algebraic solution to determine the time(s) of day, the water reaches the depth of 10.29 m( give ...
Friday, July 22, 2016 by ba

math
The solution of x for equation a (bx - c) = d - (x + e) (a > 0 and b > 0) the answer is x = ac + d - e/ab + 1 How?
Friday, July 22, 2016 by jose

Math
The function g(x)=ax^3−x^2+x−24 has three factors. Two of these factors are 𝑥−2 and 𝑥+4. Determine the values of a and b then determine the other factor.
Friday, July 22, 2016 by Sherry

Math
For a certain day,the depth of water,h, in metres in PEI, in hours is given by the formula:h(t) = 7.8sin (pi/6(t-3)), t E [0,24], assume t=0 represents midnight. Provide an algebraic solution to determine the time(s) of day, the water reaches the depth of 10.29 m( give your ...
Friday, July 22, 2016 by Stacy

Math
It takes 3 men to dig 2 identical trenches in 5 hours.If all the men work at same rate,how long will it take 5 men to dig 7 of these trenches?
Friday, July 22, 2016 by Jovanni

math
a bag contains 6 blue marbles and 10 red marbles. If you choose one marble at random, and then another marble at random, what is the probability that both marbles are blue?
Friday, July 22, 2016 by carol

math
find the probability of choosing a queen or a diamond from a standard deck of 52 cards
Friday, July 22, 2016 by Anonymous

math
Find the probability of choosing spade or a red card from a standard deck of 52 cards
Friday, July 22, 2016 by Anonymous

math
Write the equation in standard form, given the following information. vertex(-2,4), directrix y=1
Friday, July 22, 2016 by Anonymous

math
Find value of x for log1/2(x-1)+log1/2(x+1)-log1/√2(7-​x)=1
Friday, July 22, 2016 by prashik

Math
Posted by Pam on Thursday, July 21, 2016 at 10:41am. One day 3/8 of the students in Jack's class ate toast for breakfast. Another 1/8 of the students ate oatmeal. Jack added the fractions and found the sum was 7/8. Which statement best describes the sum 7/8? A) It is ...
Friday, July 22, 2016 by Pam

math
A man walks 40 m due north and 50 m due west. Find the distance from the starting point?
Friday, July 22, 2016 by kinjal

math
In a class,30 students passed in math,20 passed in physics and 8 passed in both. How many students failed in both if the class has 45 students?
Friday, July 22, 2016 by miki

math
find missing denominator of 3\7=15\? to show equivalent fraction
Friday, July 22, 2016 by Anonymous

math
$420 is divided between A & B so that A gets 3/7 th of what B gets.what amount doea A get?
Friday, July 22, 2016 by tisha

math
a compositor takes 1 hour 45 min to compose 24 page of a book. how long will be take to compose 64 pages
Friday, July 22, 2016 by sartaj singh

Math
a) Find the values of x and y so that the ordered data below has a median of 31 and a mean of 31.25. 13, 17, 25, 27, 28, x, 32, 36, 37, 40, y, 47 b) The numbers below have been written in ascending order. Find the values of a, b, c and d if the mode is 15, the median is 17, ...
Friday, July 22, 2016 by Anonymous

Math
A girl leaves her home A at 9am, and after cycling for 25km at 5km/h she reaches her destination B at 2pm. After having lunch at B for 90 minutes, she sets off for home. On the way home she stops for half an hour to see a friend who lives at C, which is 10km from A. At 5:30pm...
Friday, July 22, 2016 by Anonymous

math
In five years time thabo will be three times as old as he was nine years ago.how old is he now
Friday, July 22, 2016 by tauqir adams

Math
I am having a little trouble figuring this problem out if someone could help I would appreciate it. Question: The angle of elevation to the top f a tree sighted from ground level is 19degrees. If the observer moves 60 ft closer, the angle of elevation from ground level to the ...
Thursday, July 21, 2016 by Pam

math
If I have a jar that holds 1 quart so how many chocolate chips can fit in there
Thursday, July 21, 2016 by lan

math
If I have a jar and it holds 1 quarts so how many chocolate chips can fit in there
Thursday, July 21, 2016 by lan

math
a board is 19ft 9inches long is cut into nine equal pieces to the nearest inch. how long is each piece? how many inches of board will be left over?
Thursday, July 21, 2016 by charlie

Math
Posted by Pam on Thursday, July 21, 2016 at 10:41am. One day 3/8 of the students in Jack's class ate toast for breakfast. Another 1/8 of the students ate oatmeal. Jack added the fractions and found the sum was 7/8. Which statement best describes the sum 7/8? A) It is ...
Thursday, July 21, 2016 by Pam

math
John can cut the grass in 4 hours working by himself. When john cuts the grass with his younger brother michael, it takes 3 hours. How long would it take michael to cut the grass by himself?
Thursday, July 21, 2016 by Lauren

math
What is the sum of all integers x,such -36 <x<38?
Thursday, July 21, 2016 by tisha

math
In how many years taka 1800 will become taka 2250 if the simple interest rate is 5%?
Thursday, July 21, 2016 by tisha

math
A merchant marks a certain lamp up 30% above cost.then he gives a customer a 15% discount.if the final selling price of the lamp was $99,what was the approximate cost price?
Thursday, July 21, 2016 by tisha

Math CSET
A student scores 96 on a test. The class average is 84, with a standard deviation of 4 points. What percentage of the class scored below this student? I understand the 96-84/4 part to obtain a z-score of 3. What I do not understand is, if I do not have access to a z-score to ...
Thursday, July 21, 2016 by Michael

Math
What are the two prime numbers that if added together equals 99?
Thursday, July 21, 2016 by Moyo

math 1324
The matrix FROM R D I [ 0.6 0.1 0.1] R P=[ 0.2 0.7 0.1] D TO [ 0.2 0.2 0.8] I To is called a stochastic matrix. Each entry pij (i ≠ j) represents the proportion of the voting population that changes from Party i to Party j, and pii represents the proportion that remains ...
Thursday, July 21, 2016 by Anie

general math
the taxpayer should pay 6% of his total income if his income amounts to php 500,000 or below, if his income is between php 500,000 and php 1,000,000 the taxpayer should pay 8% of the total income, if the income is php 1,000,000 or more, he should pay 9.5% of the total income, ...
Thursday, July 21, 2016 by ched

general math
A souvenir store charges PHP 15.00 per keychain for orders amounting 50 or fewer keychains, PHP 12.50 per keychains for orders of 75 or fewer but more than 50 kechains. Which function best represents the cost K(x) of the x number of keychains. hi. i hope you can help me and i ...
Thursday, July 21, 2016 by Marian

general math
the taxpayer should pay 6% of his total income if his income amounts to PHP 500,000 and PHP 1,000,000, the taxpayer should pay 8% of the total income. If the income is PHP 1,000,000 or more, he should pay 9.5% of the total income. Express the tax as a function of x for any PHP...
Thursday, July 21, 2016 by Rachelle

general math
The base jeepney fare is PHP 8.00 for the first four kilometers and an additional PHP 1.50 per kilometers for the succeeding kilometers, express the fare for x kilometers as a function of x. please help me and kindly put the solution too. thank you :)
Thursday, July 21, 2016 by Rachelle

math
How do I write 0.8% as a fraction in lowest terms? I thought I put .8 over 10 and then multiplied by 10/10 to get rid of the decimal. So then I would have 80/100 and then reduce from there which would be 4/5, but my teacher says the answer is 1/125. Thank you.
Thursday, July 21, 2016 by Dani

Math
One day 3/8 of the students in Jack's class ate toast for breakfast. Another 1/8 of the students ate oatmeal. Jack added the fractions and found the sum was 7/8. Which statement best describes the sum 7/8? A) It is reasonable because 1/2 + 0 = 1/2. B) It is reasonable ...
Thursday, July 21, 2016 by Pam

Math
When at rest an average adult breathes in and out every 4s. the average minimum amount of air the lungs is 0.08L and the average maximum amount of air in the lungs is 0.82L. Assume the lungs have a minimum amount of air at t=0 where t is time in seconds. a) write a function to...
Thursday, July 21, 2016 by ba

Math
You wish to paint your room. It's four walls measures 9ft high and 10ft wide. If one gallon of paint covers 120sq. ft, how many gallons of paint will you need? Please help?!!! Need this. Urgent.. With solutions please 🤖
Thursday, July 21, 2016 by Dianne

Math
The average age of Ali,Ben and Chandra is 10 years.Ali is 3 years older than Ben.Ben is 6 years older than Chandra.how old is Chandra
Thursday, July 21, 2016 by John

math
it takes raiz 30 minute to mark a peper,razi only takes 25 minutes to mark a peper,if they both start marking paper at 11;00am what is the first time they will finish marking paper at same time?
Thursday, July 21, 2016 by anam

math
the productivity of a person is modelled by the function y=5cos(pi/2 t)+5, where t is in hours and t>and equal to 0. if the person starts work at 8:00am and works for 12 hours determine at what times they are least productive.assume that t=0 represents 8:00am.
Thursday, July 21, 2016 by Stacy

Physics or Math
Question: A Toyota car travelled at the rate of 70 km/hour leaves the house 2 hours after a Kia car has left and overtakes it in 5 hours. at what rate was Kia car travelling? what's the formula pls?
Thursday, July 21, 2016 by John

math
a rectangle with side of 6 cm and 5 cm has the same area as an isoceles triangle with base length 12 cm.find the altitude to the base of the triangle and side of the triangle
Thursday, July 21, 2016 by dcs

Math
What is the pH of buffer solution prepared with 0.05 M ammonia & 0.05 M ammonium chloride? The Kb value of ammonia is 1.80 ✖️ 10^-5 at 25C.
Wednesday, July 20, 2016 by Neth

Math
At a certain store, employees may buy clothing at a 20% discount from the original price, but must pay a 6% sales tax. If the final cost of a sweater purchased by an employee is $55.12 what is the original price of the sweater, before the discount and tax? Explain please
Wednesday, July 20, 2016 by Anonymous

Math
On each of four cards, a different positive integer greater than 1 but less than 20 is written. Exactly 3 of the numbers are multiples of 3, exactly two of the numbers are multiples of 5, and none of the numbers is even. What is the sum of these four numbers?
Wednesday, July 20, 2016 by Lenin

Math
In a group of 500 students, 150 are studying physics, 220 are studying biology, and 100 are studying chemistry. At least 25 students are studying more than one of these sciences. What is the greatest possible number of these students that might NOT be studying any of these ...
Wednesday, July 20, 2016 by Anonymous

math
Given that 0 ≤ 𝑥 ≤ 𝜋/2and 0 ≤ 𝑦 ≤𝜋/2 find the exact value of 𝑡𝑎𝑛(𝑥 + 𝑦) if 𝑐𝑜𝑡(𝑥) =6/5 and 𝑠𝑒𝑐(𝑦) =3/2
Wednesday, July 20, 2016 by Stacy

Math - Trig
The equation given below models the average monthly temperature (˚C). t denotes the number of months with t=1 representing January. During which months is the average monthly temperature 12.5˚C? 𝑇(𝑡) = 12.5 + 15.8sin (𝜋/6 (𝑡) −2...
Wednesday, July 20, 2016 by Anonymous

Math - Trig
A hamster enters a wheel at the lowest point and begins to run . The height of point R (in the diagram below) above the ground is given by the function ℎ(𝑡) = −17.5 cos ( 2pi/3 𝑡) + 19, where ℎ is height in centimeters and 𝑡 is time in...
Wednesday, July 20, 2016 by Anonymous

Math
For what value(s) of r is r^2+5r+6/r+2 equal to 0? A) -2 only B) -3 only C) 3 only D)-2 or -3 E) 2 or 3 I got A but it is incorrect and I'm still confused Thanks
Wednesday, July 20, 2016 by Damon

Math
If given the graph of 𝑓(𝑥) = − sin (3x + 𝜋/3 ) − 2 describe the steps you would take to draw the graph of the reciprocal function
Wednesday, July 20, 2016 by Anonymous

Math
A mortgage of 200 000 is required to purchase a house. The mortgage will be repaid with equal monthly payments over 25 years at 10% compounded monthly. what is the monthly payment
Wednesday, July 20, 2016 by Jennfier kosner

math
the product of three numbers is 315.if two of the numbers are 7 and 9 .what is the third number?
Wednesday, July 20, 2016 by joshua

Math
The tornadoes have won 75% of their games. If they their next 4 games, their win percentage goes up to 80%. How many games have they played right now? (Please explain how to solve this problem)
Wednesday, July 20, 2016 by Selina

math
ther 840 people in mrs mitchells class and 453 people in mrs coles class i want to know how many people all are toghether
Wednesday, July 20, 2016 by melshia griffin

Math
Clark has 7 1/2 feet of wire. Part A. How many 3/4 foot pieces can Clark cut from the 7 1/2 feet of wire? Part B. Using the information in Part A, interpret the meaning of the quotient in terms of the two fractions given.
Wednesday, July 20, 2016 by Anonymous

Math
A number sentence is 50 1/2 ÷1/4 =202. Part A. Create a story or context for this number sentence. Part B. Rewrite this number sentence using multiplication. Part C. Give a verbal explanation that describes how these three numbers are related.
Wednesday, July 20, 2016 by Anonymous

Math
The dimensions of a rectangular prism are Length 2/14 feet width 1 foot Height 1 1/4 feet. The length of the sides of a small cube are 1/4 foot each. Part A. How many small cubes can be packed in the rectangular prism? Part B. Use the answer obtained in Part A to find the ...
Wednesday, July 20, 2016 by Anonymous

Math
There are 45 students in a class of which 3/5of them are boys.how many girls ate there in the class?
Wednesday, July 20, 2016 by Nad

Math
Part b using the information in part a , interpret the meaning of the quotient in terms of the two fractions given
Wednesday, July 20, 2016 by Angela

Math
if sec(x) = - squaroot 20 /3 (squroot applies to 20 not the fraction) then state the exact vale of tan (x)
Wednesday, July 20, 2016 by Anonymous

Math
How many small cubes can be packed in the rectangular prism
Wednesday, July 20, 2016 by Karuun

math
if the ratio of interior angle of triangle are 4:11:3.Find the greater angle.* i am confused about the word greater does the question need the angle with 11 ratio or 4 ratio?
Wednesday, July 20, 2016 by kelvin

Math
How far will a 4ft diameter wheel travel while making 100 revolution?
Wednesday, July 20, 2016 by Paul

math
the sum of three consecutive numbers is eighteen. Write an expression describing the equation and solve the state of the three numbers
Wednesday, July 20, 2016 by Erica

math
the sum of three consecutive numbers is eighteen. Write an expression describing the equation and solve the state of the three numbers
Wednesday, July 20, 2016 by Erica

Math
Roots. Solve and check 1/4 -1/x+6= 1/x
Wednesday, July 20, 2016 by Cazi melar

math
The area of a variable rectangle is increasing at the rate of 40cm/s. The length of a rectangle is always equal ti the square of the breadth. At what rate the length is increasing at the instant when the breadth is 8cm?
Wednesday, July 20, 2016 by bengia lucy

math
show that abc is a right angled isosceles triangle prove that AD>AC and AC>CD also arrange in ascending order
Wednesday, July 20, 2016 by dcs

math
The angles of elevation of a balloon directly above a straight road, from two points of the ground on opposite sides of the balloon, are 78¡ã15' and 59¡ã47'. If the points are 5000ft apart, what is the height of the balloon?
Wednesday, July 20, 2016 by james

Math
If a(b)=b^2 -2b and 4a(b)=a(2b)-24, what is the value of b?
Tuesday, July 19, 2016 by Anonymous

Math
if e and f are inversely proportional and e=3 when f=9, then what is the value of e when f=3^-1? Please help.
Tuesday, July 19, 2016 by Anonymous

Math
If p^1/3 = (8x)^1/6, x^-1/2 =4^-1/4, and 4y = |p-8|, what is the value of y?
Tuesday, July 19, 2016 by Lenin

Math
If q^1/2 = x, x^-1/4 = 4^-1/2, what is the value of q? Plz help me!
Tuesday, July 19, 2016 by Benjamin

Math
How many possible values exist for y if 4-3y<10,-y-8>-14,and y is an integer? Help?
Tuesday, July 19, 2016 by Anonymous

Math
c and d are positive consecutive odd integers whose sum is 240. If c > d, then 1/square root of c=? Help?
Tuesday, July 19, 2016 by Alissa

Math
Given that |a-2| = 9 and |w-1| = 6, where a < 0 and w < 0, what is the value of aw? Please help and explain.
Tuesday, July 19, 2016 by Jessi

Math
If the sum of the five consecutive integers is 80, what is the value of sum of the least of these integers and the median of these integers? Can you explain it?
Tuesday, July 19, 2016 by Anonymous

math
one of the angle of triangl is 60 degree.the smaller angle of the other two angle is half of the greater.find all angles
Tuesday, July 19, 2016 by doon iernational

Math
The earth takes 365 1/4 days to go around the sun. Mercury takes 3 days less than 1/4 of this time. How many days does Mercury take to go around the sun? I believe I would have to find 1/4 of the 365 1/4 days then take 3 days out. I was given this do as home work but was not ...
Tuesday, July 19, 2016 by Arianna

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