Agroup of numbers, symbols, and operators is known as a(n)
a. expression
b. value
c. array
d. term

A group of numbers, symbols and operators is known as an expression. This is an example of an expression: 16x^5 + 45/x^2 + Z Log (x) - 2450. As you can see there you have simbols, numbers and operator. A value is just a number a term is a part of an expression , for example the expresssion used as example has 4 terms (16x^5 is one term, 45/x^2 is other terms, Z log(x) is other term and - 2450 is other therm. An array is a set of elements ordered by rows and columns.

No he does not because he can only cover 12 square feet from 15 square feet which he will still need 3 more. this is because if 3×5=15 square feet and 15-12=3 which thats the answer

Do the inverse operation