Answer:
x=9
Step-by-step explanation:
81 is the product of -9 & -9. -9-9=-18. Therefore, (x-9)^2=0, and you get that x=9.
Answer:
12
Step-by-step explanation:
its direct proportion. 15 divided by 5 is 3 so you must multiply 3 by 4 to get the amount of people, which is 12
Answer:
55
Step-by-step explanation:
the four number is 26+27+28+29
so 26+29=55
Answer:
-20/7
Step-by-step explanation:
5m +72 = -2m + 52
5m + 2m = 52-72
7m = -20
m = -20/7
Answer: for the first one x>-6, for the second one x< or equal to 5
Step-by-step explanation:
