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Simplifying with negative exponents 2006-05-02
Kristine pose la question :

I am having a hard time understanding factoring and multiplying polynomials. I have a couple of problems I just can't get, can you please help me?

Simplify, do not use negatives in the answer:
(5a-1b-7)(-2a4b2)

and:
(5x2y-7z)(-4xy-3z-4)


Stephen La Rocque lui répond.
A word problem with fractions 2006-05-02
Stuart pose la question :
I have 54 1/4 yards of material. i need to cut as many pieces as possible out of it that are 3 1/12 long. how many pieces will you get and how much is left over?
Stephen La Rocque lui répond.
Solving an equation without using algebra 2006-05-01
Kenneth pose la question :
How can the following be solved without using algebra? 10 times some number is 3 times the same number plus 14.
Paul Betts lui répond.
Rate of ladder falling 2006-04-30
Harsh pose la question :
A ladder 4 m long rests against a vertical wall. If the bottom of the ladder slides away from the wall at a speed of 30 cm/s, how quickly is the top of the ladder sliding down the wall when the bottom of the ladder is 2 m from the wall?
Stephen La Rocque lui répond.
How much does 1300cc of liquid weigh? 2006-04-28
Debra pose la question :
How much does 1300cc of liquid weigh, and how is the formula equated?
Stephen La Rocque lui répond.
Adding polynomials and counting the terms 2006-04-28
Kris pose la question :
Suppose that two polynomials, each containing 3 terms, are added. Is it possible for the sum to contain more than 3 terms? fewer than 3 terms? exactly 3 terms? Explain.
Leeanne Boehm and Steve La Rocque lui répond.
School bus reliability - a probability question 2006-04-27
Peggy pose la question :
The school bus arrives at Janet's stop on time on 75% of school mornings. What is the probability it will arrive on time each day in a 5-day week?
Stephen La Rocque lui répond.
The last slice of pizza 2006-04-27
Lori pose la question :
I have a pizza. The radius is 10 inches long.The pizza was cut into 16 equal slices. When one slice was left, my sister and I both wanted it, so we agreed to cut it in half, but I like the crust more than she does, so we decided to cut it the "other way." In other words, the two pieces would not be symmetrical. The inside piece would contain all topping, and the outer piece would contain some topping and some crust. How far up the radius from the center of the circle will I need to cut so we will both have an equal area of pizza?
Stephen La Rocque lui répond.
Ladder and wall 2006-04-27
Lori pose la question :
A 12-foot ladder is leaning across a fence and is touching a higher wall located 3 feet behind the fence. The ladder makes an angle of 60 degrees with the ground. Find the distance from the base of the ladder to the bottom of the fence.
Stephen La Rocque lui répond.
How wide is this runway? 2006-04-27
Sam pose la question :
A runway is 3.75 miles long and covers a total of 5.6 acres. What is the width of the runway?
Stephen La Rocque lui répond.
If the perimeter of a square is 1 foot, what is its area? 2006-04-27
Larry pose la question :
If the perimeter of a square is 1 foot, its area is how many square inches?
Stephen La Rocque lui répond.
Odd-man out coin tossing and probabilities 2006-04-27
Kalyan pose la question :
When four people toss fair coins, what is the probability that in a given toss there will be one "odd man". That is one person whose coin does not have the same out comes as that of any other members?
Stephen La Rocque lui répond.
Pythagorus and cone dimensions 2006-04-26
Glynnis pose la question :
How do you find the measure of a side that is not the hypotenuse using the Pythagorean Theorem? Also, how do you figure the surface area and volume of a cone when the radius is 5 yards and the height is 8 yards?
Stephen La Rocque lui répond.
Percentage of weight 2006-04-26
Karen pose la question :
How do you calculate percentage of weight lost?
Stephen La Rocque lui répond.
Marine shipping - fuel consumption 2006-04-26
Sandy pose la question :
When a ship is 800 nautical miles from port its speed is reduced by 20%, thereby reducing the daily fuel consumption by 42 tonnes and arriving in port with 50 tonnes onboard. If the fuel consumption per hour is given by the expression (0.136 + 0.001V^3) where V is speed in knots; Estimate a) reduced consumption per day b) fuel onboard when speed reduced c) normal consumption for 800 nautical mile voyage d) increase in steaming time
Stephen La Rocque lui répond.
 
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