Answer:
90
Step-by-step explanation:
Think of 5(18) as 5(10+8). This is easily done mentally: 50 + 40 = 90.
Answer:
It should be A
Step-by-step explanation:
This is because when we insert 3 into x we would get:
y = -2
By looking at the pics only one looks setting to the formula
Answer:

Step-by-step explanation:

Move the variable to one side by finding common denominator
1/4 - 7/10p = 1/20p
5/20 - 14/20p = 1/20p
+ 14/20p +14/20p
5/20 = 15/20p
Simplify
1/4 = 3/4 p
multiply both sides by 4, then divide both sides by 3
1 = 3p
1/3 = p