Aspring stretches to 18 cm with a 70 g weight attached to the end. with a 100 g weight attached, it stretches to 24 cm. which equation models the distance y the spring stretches with the weight x attached to it?

a. y = -1/5x + 4
b. y = 1/5x - 4
c. y = -1/5x - 4
d. y = 1/5x + 4

d.

Step-by-step explanation:

Let y denote the distance the spring stretches with the weight x attached to it.

Since  the distance the spring stretches is directly proportional to the weight attached to it.

Therefore, the relationship between the quantities is linear.

The linear equation with points (70,18) and (24,100) is given by:-

hence, d is the right answer.

The equation models the distance y the spring stretches with the weight x attached to it is given by:-

percentage - 25%

probability - 0.25

we know,

total amount of students in class = 20

total boys = 10

total girls = 10

no of girls who wear glasses = 10/2 = 5

probability of choosing a girl with glasses is =

number of girls wearing glasses/total number of students in the class = 5/20

thus, percentage of selecting a girl wearing glasses will be

= 5/20 × 100

= 5 × 5

25%

therefore,

probability will be 0.25

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12cm

the answer is d