08/08/14

A supermarket charges $4.50 for eight cans of cat food, at the same rate how much would 28 cans of cat food cost?
$4.50*8=36.00, 36.00*8=
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08/08/14

How many multiples of 21 are there between 200 and 400?
How many multiples of 21 are there between 200 and 400?
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08/08/14

mathematics(complex)
If the center of the regular hexagon is at origin and one of the vertex on argand diagram is 1+2i, then the perimeter is?
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08/07/14

math question
I have a 500 gallon tank at 80%. If I remove 100 gallons would the tank be 60%?
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08/07/14

RC Circuit Help
Use the equation vc= V(1-e-t/RC)   to prove that when power supply is turned on   τ = t / (ln(V) - ln (V- vc)
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08/07/14

Please help me simplify
Please help me simplify:   √y + (√y + 7) = 7   Inside the parentheses is all under the square root sign.   So, the square root of y + the square root of y+7 = 7       I know that y can... more
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08/06/14

2v3 + v27 - v1/3 =
I have it down to 5√3 – 1                                     √3Do I then multiply just the second part by √3/√3 or both?    
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08/06/14

word problem
Three students, Phumelo, Ivan and John, painted a room together. They spent 4 hours, 3hours and 1 hour, respectively, on the task. They earned R400 in total, for the job. How muchshould each of... more
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08/05/14

The ratio of p brave men to O on the battlefield is 17 to 2. If the total of both on the battlefield is 342, how many are O?
The ratio of p brave men to O on the battlefield is 17 to 2. If the total of both on the battlefield is 342, how many are O?
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08/04/14

an object 6.9 feet tall casts a shadow that is 20.7 feet long. how long in feet would the shadow be for an object which is 19.5 feet tall?
an object 6.9 feet tall casts a shadow that is 20.7 feet long. how long in feet would the shadow be for an object which is 19.5 feet tall?
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08/04/14

Differentiate the function.
I can't figure out how to differentiate this function. Any help would be appreciated. y=ln(x9(sin(x))2) Find y'(x)=
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08/04/14

help me please
A 28-year-old man pays $165 for a one-year life insurance policy with coverage of $140,000. If the probability that he will live through the year is 0.9994, what is the expected value for the... more
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08/02/14

Find its dimensions.
The width and length of a rectangular poster are in a 2:3 ratio.The perimeter of the poster is 160 cm.
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08/02/14

how to simplify problem
14xy 105xyz
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08/01/14

Indice question?
Solving the equation 32x - 10(3x) + 9 = 0. What are the two solutions?
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08/01/14

Precalc questions
1. In the equation of a line, y=4x-3, the number -3 represents the________.   2. In the equation y=mx+b, the letter_________ represents the slope and the letter ________ represents the y-... more
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08/01/14

A total invetment of 10,700 is made into 2 savings accounts. One yields 7% simple interest and the other 9% simple interest.
The investor earns a total of $891.00 interest for the year. How much was invested in the 7% account?
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08/01/14

Probability question
Hi, I have a question on probability that I don't know how to approach:   Box A contains 10 cards numbered 1 through 10, and box B contains 5 cards numbered 1 through 5. A box is selected at... more
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07/31/14

What is the probability of rolling a 1 exactly 3 times?
You roll a number cube 4 times. What is the probability of rolling a 1 exactly 3 times?
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07/31/14

Where does the mass to energy conversion take place?
As I understand, the nuclear bomb "little boy" detonated over Hiroshima converted about the mass of a paper clip into energy during the explosion. Now, as far as I understand what was going on,... more
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07/31/14

How to solve this
31/2sinx + cox is maximum when x is 
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07/31/14

Solve the order of operations
4 x 2 + [8-(16-5)]
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07/30/14

Complete the table for each function
1. f(x)=3x2 -32. g(x)= 1/9x2 3. h(x)= -x2 ive tried to do this multiple times and I feel like I keep getting the table wrong which prohibits me from finishing the questions. I made this makeshift... more
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07/30/14

Find the dimensions of the rectangle
the length of a rectangle is 3cm more than the width the area is 70cm2
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07/30/14

What is the length of an arc cut off by an angle of 2.75 radians on a circle of radius 4 inches?
What is the length of an arc cut off by an angle of 2.75 radians on a circle of radius 4 inches?
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