Answer:
100
Step-by-step explanation:
10 is 10% of X
Equation: Y = P% * X
Solving our equation for X
X = Y/P%
X = 10/10%
Converting percent to decimal:
p = 10%/100 = 0.1
X = 10/0.1
X = 100
Answer:
D
Step-by-step explanation:
100+25 * 12 ; 100+300 = 400 ; difference = 400-320=80 ; percent increase since it is 1 year = 80/320 =1/4=0.25 = 25/100=25%

The constant of proportionality,m, is 3 (option B)
-7.5 / -2.5 = 3
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This is how I would do it, hope this helps!