7 students have 5 blocks each. Which helps you find the total number of blocks? 7 - 5 7 ÷ 5 7 × 5 7 + 5

Find the number of positive three-digit even integers whose digits are among 9, 8, 7,5, 3, and 1.

Which of these is and example of a literal equation? a) 6+30=6^2 b)3x-4y c)12=9+3x d)ax-by=k

On a string instrument, the length of a string varies inversely as the frequency of its vibrations. an 11-inch string has a frequency of 400 cylces per second. find the frequency of a 10-icnch string.