## Search found 5 matches

Fri Sep 02, 2011 10:34 pm
Forum: Beginning Algebra
Topic: using formulas to find values: stopping distance, ball ht.,
Replies: 3
Views: 2470

### Re: using formulas to find values: stopping distance, ball h

That's the issue...word problems are my kryptonite. Any help of a walkthrough would be appreciated.
Fri Sep 02, 2011 10:31 pm
Forum: Pre-Algebra
Topic: Find two equivalent expressions for the opposite of the poly
Replies: 3
Views: 3213

### Re: Find two equivalent expressions for the opposite of the

Not really sure, I just know one of the expressions is -(-7x^2+4)

I just need help figuring out the other one
Fri Sep 02, 2011 9:37 pm
Forum: Pre-Algebra
Topic: Find two equivalent expressions for the opposite of the poly
Replies: 3
Views: 3213

### Find two equivalent expressions for the opposite of the poly

-7x^2 + 4
Fri Sep 02, 2011 9:31 pm
Forum: Pre-Algebra
Topic: exponents: converting to sci. notation, simplifying x * x^-7
Replies: 1
Views: 2020

### exponents: converting to sci. notation, simplifying x * x^-7

1) Express the answer in scientific notation to two decimals: The earth is approx. 92,900,000 miles from the sun. If 1mile = 1.61 x 10^3m, what is the distance to the sun in meters? 2) Simplify: x * x^-7 (Do not use negative exponents in the answer.) 3) Write an equivalent expression using positive ...
Fri Sep 02, 2011 9:22 pm
Forum: Beginning Algebra
Topic: using formulas to find values: stopping distance, ball ht.,
Replies: 3
Views: 2470

### using formulas to find values: stopping distance, ball ht.,

1) The distance D in feet it takes a car travelling at x mph to come to a full stop after hitting the brakes is given by D=1.26x^2 + 0.075x. Estimate the stopping distance for a car travelling at 40mph. 2) During the first seconds, the height h in feet of a baseball after t seconds is given by h = -...