Answer:
8.) Part A: C
Part B: B
9.) D
10.) 90degrees
11.) Part A: C
Part B: B
Step-by-step explanation:
8.) 5x + 8 + 3x - 14 = 90
Combine Like Terms:
8x - 6 = 90
Subtract:
8x = 90
Divide:
x = 12
Plug x in :
5(12) + 8 = 68
3(12) - 14 = 22
9.) 7x + 10 = 12x - 75
7x = 12x - 85
5x = 85
x = 17
12(17) - 75 = 65
10.) 6x - 9 = 3x + 18
3x - 9 = 18
3x = 27
x = 9
6(9) - 9 = 45
12(17) - 75 = 45
45 + 45 = 90
11.) 6x - 9 + 3x + 18 = 180
9x + 9 = 180
9x = 171
x = 19
6(19) - 9
114 -9 = 105
3(19) + 18
