Question

Combine like terms to create an equivalent expression: 2 * 5 - a + 1.

a) 7a - 3
b) 3a - 7
c) -3a + 7
d) -7a + 3

Answer 1

To combine like terms for the expression 2 * 5 - a + 1.a, you multiply 2 by 5 to get 10, then add and subtract 'a', cancelling each other out, leaving the simplified expression as 10.

Step-by-step explanation:

The question asks to combine like terms to create an equivalent expression for 2 * 5 - a + 1.a. First, we address the multiplication: 2 * 5 which equals 10. Next, we look at 1.a, which is the same as 1 * a, simplifying to 'a'. Now, combine like terms by adding 10 and subtracting 'a':

10 - a + a.

Since 'a' and '-a' are like terms and they cancel each other out, the remaining expression is simply 10.

There are no terms with 'b' present in the original expression, so it is presumed that '3b' in the provided options is a typo that should be ignored.