Which expression represents the sum of 21 and an unknown number?

A. 21-d

B. 21+d

C. 21:d

D. 21d

Whats the algebraic expression of the difference of an number and 45 is 12

17. If 10 is 20% of a number, then what is 200% of that number? A. 200 B. 100 C. 80 D. 50 E. 40

The area of a triangle is 32 square inches. The height of the triangle is 8 inches. What is the length of the base if the triangle

Rename 456/100 as a mixed number

A group of seven musicians includes three violinists and four harpists. An instructor randomly selects one of the musicians to play the first part of a duet and a different musician to play the second part of a duet.

Which ratio is equivalent to 8:6

45.75 as a fraction

What does 1 quart - 1 pints equal?

Complete the ratio table. 16 17 32 51 64 68 80 85

Rewrite expression in standard form by combining like terms 2/5x + - 6 + 7/15x