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jekas [21]
2 years ago
8

The length of a spring varies directly with the mass of an object that is attached to it. When a 30-gram object is attached, the

spring stretches 9 centimeters. Which equation relates the mass of the object, m, and the length of the spring, s?
A s= 3/ 10m
B s= 10/3m
C m=3/10s
D m=1/30s​
Mathematics
1 answer:
Korvikt [17]2 years ago
4 0

Answer:

Step-by-step explanation:

I'm assuming that the length of the spring is s and the mass of the object is m. If that be the case, the direct variation equation, which a line btw, is

s = km where k is the constant of proportionality. We have to solve for k, the slope of the line, in order to determine the model for this situation.

9 = k(30) so

k=\frac{9}{30}=\frac{3}{10} Now that we know, the slope of the line, we can rewrite the equation with the slope in place:

s=\frac{3}{10}m, choice A.

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tresset_1 [31]

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Problem 8
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Answer:

Explanation:

1. x represent the copybook while y represent the pen that is bought.

2. 2x + 3y = 9000 means that in order to buy 2 copybooks and 3 pen you have to pay 9000 LL.

3. Solve for the price of x and y

2x + 3y = 9000 (1)
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Multiply (1) by -2:

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