Answer:
620
Step-by-step explanation:
80*4=320
75*4=300
320+300=620
6 1.5/4
11a. 15x + 6
11b. x + 8 < 16 or x + 8 - 16
12. 3x + 15 + 5x = 8x + 15
13. 7x + 31
15/8
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