What is the value of x in the equation 2x + 9 = 21? (4 points)
2
6
9
15
2.
What is the value of z in the equation 5(2z + 4) = 0? (4 points)
-2
0
2
20
3.
What is the value of c in the equation 2c + 5(c – 5) = 10? (4 points)
0
2
5
10
4.
An equation is shown below:
3(4x + 5) = 12
Which of the following correctly shows the beginning steps to solve this equation? (4 points)
Step 1: 12x + 15 = 12
Step 2: 12x = –3
Step 1: 12x + 5 = 12
Step 2: 12x = 7
Step 1: 7x + 5 = 12
Step 2: 7x = 7
Step 1: 7x + 8 = 12
Step 2: 7x = 4
5.
How many solutions can be found for the equation 3y + 5 – 2y = 11? (4 points)
Zero
One
Two
Infinitely many