A list is made of all possible 2-digit whole numbers that result from using only the digits 1,3,5, and 7 in both the ones and tens place, with duplications allowed. How many whole numbers in the list are prime numbers?

A.6
B.7
C.8
D.9
E.10​

Which ordered pair (c, d) is a solution to the given system of linear equations- c+2d=13 -9c-4d=-15

Guys i really need or i have to stay late up night

The volume of gas a balloon can hold varies directly as the cube of its radius. imagine a balloon with a radius of 3 inches can hold 81 cubic inches of gas. how many cubic inches of gas must be released to reduce the radius down to 2 inches?