Answer:
6
Step-by-step explanation:
The ratio of is a constant
= = =
That is y = x
When x = 21, then
y = × 21 = 6
b
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Yes!
4.70 (1/100) = 4.70(.01) = .047
18
Step-by-step explanation24/0.75 is 18
A)y=9x+5
If x=-1, y=-4,
y=9*-1+5=(-9)+5=-4
If x=0, y=5,
y=9*0+5=5