Answer:
a.
500x+0.04=y
400x+0.05=y
for percentages move decimal to the left twice
Is there a worksheet that goes with it? So I can understand better

k and m must satisfy 8k = 1 mean k = ⅛
and 2km+⅝=0 mean m = -5/2
Answer:
1. 81
2. 108 1/2
3. 189 1/2
Step-by-step explanation:
Answer:
20%
Step-by-step explanation:
Find the difference of both prices.
150 - 120 = 30
Calculate the ratio of the decrease in price to the original price.
30/150 = 0.2
Multiply the decimal by 100 to get your percentage.
0.2(100) = 20