To decrease a number by 21% what do you multiply by

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It takes Alfonzo 3/4 hour to mow a lawn. Write and solve an inequality to find the number of lawns he can mow if he works at least 15 hours.

Theo buys 5 packages of paper there are 500 sheets of paper in each package how many sheets of paper did theo buy?

The amount of cloth used to make four curtains is given by the function A = - 4x^2 + 40x, where x is the width of one curtain in feet and A is the total area in square feet. Find the width that maximizes the area of the curtains.

What is - 9 as a fraction?

katy paid 23 dollars to have her haircut. she left a 20% tip. Then she bought shampoo for $6. what was the total amount that she spent

The busty bee book club charges an annual membership fee of $10 and $4 per book you order. what will be your total cost of being in this club when you order 9 books? write an function rule for the total cost C (n) when you order n books.

Find the zeros of the quadratic function. Solve by factoring. x^2+14x=-45

Which property is shown? If m ABC = m CBD, then m CBD = m ABC reflexive property substitution property symmetric property transitive property

How do you solve 4y^-3-x^2y^-1?

A species' population dropped from 2000 in the year 2000 to 1200in the year 2011. Find the percent decrease in its population