If Liana needs $5 to buy 6 mechanical pencils, how much money does she need to buy 7 pencils?

56.6

step-by-step explanation:

the ratio of the perimeters is equal to the scale.

the ratio of the areas is equal to the square of the scale.

34 / 20 = k

a / 19.6 = k²

substituting:

a / 19.6 = (34 / 20)²

a = 19.6 (34 / 20)²

a ≈ 56.6

the formula of a slope:

we have the points (-2, 7) and (2, 3). substitute:

final total: 63

step-by-step explanation:

60 times sales tax

60 times 0.05

3

60 + 3

63

47

step-by-step explanation: