Answer:
a
Step-by-step explanation:
to find a proportion they must equal each other
8/4 in its simplest form is just 2
to make r/3 = 2 r must be 6
6/3 is 2
You just have to divide the bigger x value by the smaller x value
-8.4/-2=4.2
Answer: 100
Step-by-step explanation:
Sub in 5 for b in the expression

You must do the exponent first as it comes before multiplication in the order of operations

Now multiply

Answer:
8
Step-by-step explanation:
-(5 – 9) - (-2)(2)
-(-4) - (-2)(2)
4 - (-4)
4 + 4
8
Use PEMDAS