What is the value of (a + b) in the system of equations below?

8(a + b) + 3z = −9
a + b + z = 2

select one:
a. -5
b. -4
c. -3
d. -2

The parabola x= √y-9 opens: a.)up b.)down c.)right d.)left

Axel follows these steps to divide 40 by 9: start with 40. 1. divide by 9 and write down the remainder. 2. write a zero after the remainder. 3. repeat steps 1 and 2 until you have a remainder of zero. examine his work, and then complete the statements below.

If a is a nonzero real number then the reciprocal of a is