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KatRina [158]
3 years ago
10

The amount a spring will stretch varies directly with the amount of weight attached to the spring. If a spring stretches 2.1 inc

hes when 80 pounds is attached, how far will it stretch when 40 pounds is attached?
Mathematics
2 answers:
Alex73 [517]3 years ago
8 0

Answer:

A. 1.05 in.

Step-by-step explanation:

aleksklad [387]3 years ago
3 0

Answer:

1.05\ in

Step-by-step explanation:

we know that

A relationship between two variables, x, and y, represent a proportional variation if it can be expressed in the form y/x=k or y=kx

Let

x -----> the amount of weight

y ----- the amount a spring will stretch

we know that

For x=80 lb, y=2.1 in

<em>Find the value of k (constant of proportionality)</em>

k=y/x

substitute the values

k=2.1/80

The linear equation is

y=(2.1/80)x

How far will it stretch when 40 pounds is attached?

For x=40 lb

substitute the value of x in the linear equation and solve for y

y=(2.1/80)(40)=1.05\ in

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Answer:

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Step-by-step explanation:

12.  the slopes are the same

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