Answer:
1/5
Step-by-step explanation:
To find how much of a meter she used per bow, divide 4 by 20, since she used 4 meters for 20 bows:
4/20
= 0.2 or 1/5
So, she used 1/5 of a meter for each bow
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15..........................
f(x)=2x+5
first find inverse
write it without f(x)
y = 2x + 5
x = 2y + 5 swap the variables, now solve for y
- 5 -5
x - 5 = 2y
/2 /2 divide both sides by 2
(x-5)/2 = y
so f-1(x) = (x-5)/2
f-1(8) = (8-5)/2
= (3)/2
f-1(8) = 3/2
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