03/02/15

one number is 3 times another. the sum of their reciprocals is 20/3.
I need to understand how to set up these kind of questions.
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03/02/15

We want to form a committee by selecting 5 males and 4 females from a group with 15 males and 10 females. How many choices are there?
We want to form a committee by selecting 5 males and 4 females from a group with 15 males and 10 females. How many choices are there?
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03/01/15

what are three consecutive odd integers who aim is 9 ?
find 3 consecutive odd integers with sum of 9 
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03/01/15

What is the smallest number of weighings required to determine precisely which bottle has the heavy pills? How can it be done?
Suppose a pharmacist is shipped ten bottles of some medication, each containing 100 pills. Suppose that before any of the bottles are sold she gets a message not to sell them because one bottle was... more
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03/01/15

Write with positive exponents.
16-3/2
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03/01/15

Tell whether the lines in each pair are parallel, perlendicular, or neither.
ax - by = 5; -ax + by = 2   Also this one   ax + by = 8; bx - ay = 1   I do not understand. Please help.
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03/01/15

A triangle with two side that are perpendicular is a right triangle.
A triangle with two side that are perpendicular is a right triangle. Triangle PQR has vertices P(3,3), Q(2,-2) R(0,1). Determine weather PQR is a right triangle. Explain.      Please help?? 
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03/01/15

Andrea buys 4 shirts and 3 pairs of pants for $85.50. She returns the next day and buys 3 shirts and 5 pairs of pants for $115. What is the price of each pants
Andrea buys 4 shirts and 3 pairs of pants for $85.50. She returns the next day and buys 3 shirts and 5 pairs of pants for $115. What is the price of each pants and shirt?
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03/01/15

A woman invested part of $21,500 at 5% interest and the rest at 7%. If her annual interest is $1,215, how much did she invest at 5%?
Yes, I need help with solving this college algebra math problem.
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03/01/15

if 3/4 of 1 inch is 1 ft, than how many ft are in 12 inches?
if 3/4 of 1 inch is 1 ft, than how many ft are in 12 inches?
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03/01/15

Mr. Mack wants to buy a watch that costs $85.00. If he gets a discount of 15%, how much does Mr. Mack have to pay for the watch before tax?
Mr. Mack wants to buy a watch that costs $85.00. If he gets a discount of 15%, how much does Mr. Mack have to pay for the watch before tax?
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03/01/15

Find the value of two numbers if their sum is 15 and their difference is 1
Please help me
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03/01/15

A pair of shoes cost $50. You have a coupon for 20% off. What is the total cost of the shoes after 5% sales tax is included? *
A pair of shoes cost $50. You have a coupon for 20% off. What is the total cost of the shoes after 5% sales tax is included? 
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03/01/15

Theoretical Probabilities
What is the probability of getting all heads when you toss 4 fair coins? (Enter as a decimal rounded to the nearest thousandth.)
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03/01/15

D=rt (how long did it take)?
Tina hiked 15 km up a mountain, and hiking down took 30 min less as her speed went up by 1 km. How long did the climb take her.
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03/01/15

how do i figure this out please answer asap
the area of a rectangular patio is 5  5/8 square yards and it's length is 1   1/2 yards . what is the patio's with in yards . how did you figure this out      how do i simplfy and combine like... more
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03/01/15

what is the answer to this how do you solve it please answer asap
sam's two new aquariums hold each exacley 200 gallons of water. one aquarium will hold small fish and the other will hold large fish now he needs new fish for his aquariums he will buy 5 small... more
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03/01/15

A quadrilateral with two pairs of parallel sides and with diagonals that are perpendicular is a rhombus
A quadrilateral with two pairs of parallel sides and with diagonals that are perpendicular is a rhombus. Quadrilateral ABCD has vertices A(-2,2), B(1,6), C(6,6), D(3,2). Show that ABCD is a... more
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02/28/15

Jessica's penny bank is 1/3 full. after she adds 440 pennies , it is 5/6 full. how many pennies can jessica's bank hold?
Jessica's penny bank is 1/3 full. after she adds 440 pennies , it is 5/6 full. how many pennies can jessica's bank hold?
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02/28/15

how to solve this in two variable equation
Each boy contributed rupees equal to the number of girls and each girl contributed rupees equal to the number of boys in a class of 60 students. if the total contribution thus collected is Rs 1600... more
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02/28/15

A hospital needs 40L of a 5% solution of disinfectant. How many liters of a 20% solution and a 4% solution should be mixed to obtain this solution?
 I'm trying to help my son do some math problems  and I don't remember how to do a percentage problem. He has a few to do, I just need one to go by.
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02/24/15

If (x) is an integer and 2<x<7, how many different triangles are there with sides 2, 7 and x?
Can you please provide step-by-step solution to the question. 
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02/23/15

Owen paid $385.56 for a dishwasher after receiving 15% discount off the list price and paying an 8% sales tax. What was the list price of the dishwasher?
I keep getting 478.87 as my answer, and I don't understand why that is wrong. 
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02/23/15

Hard math question
Two Type of players came to a chess club weak and strong.There were 10 more strong players than the weak.All strong players played against all strong players and all weak players played against all... more
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02/23/15

Factoring Trinomials
Factor   30p^2+21pq-36^2
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