15% of a mass is 45 g. Calculate 20% of the mass

The length of a rectangle is 10 yards more than the width. If the perimeter is 68 yards, what are the length and width?

Blake has b baseball cards. His aunt gave him more cards, increasing his total number of cards by 25%. Which expression represents Blake's total number of cards now? A. b + 0.25 B. b - 0.75b C. 1.25b D. 0.75b

The area of a rectangular rug is given by the trinomial r squared minus 4x minus 77r2-4r-77. What are the possible dimensions of the rug? Use factoring.

Determine whether the following pairs of lines are parallel, perpendicular, or neither. y=2x+1 2x+y=7

In Geometry, section 7-3, what is the answer for #5 of PS and PR?

What two numbers multiply to get negative 36 but add to 16

30 g serving of a certain breakfast cereal has 12.5 g of salt. How much salt would that be in centigrams?

Write each equation in slope intercept form 5x+3y=30

Last Thursday was costume day at Wayne's school. 20 out of the 100 students at the school wore a costume. What percentage of the students wore a costume?

The library has at least 5,000 books. Which inequality represents the number of books, b, at the library? A - b> 5,000 B - b> 5,000 or equal to C - b< 5,000 D - < 5,000 or equal to