Using the digits 1, 2, 3, 4, 5, 6, 7, and 9, make 4 two-digit prime numbers. What is the sum of those four prime numbers?

If private savings 'v' = 0.75s and total savings 's' equals $4.20 billion, solve for public and private savings.

Solve this problem! extra ! 3025/5.5 = a/90.75

The measurement of one angle of a right triangle is 42° what is the measurement of the third angle? (there is no picture)