Regina’s work to find the surface area of a square pyramid from its net is shown below. A square pyramid. The square base has side lengths of 9.4 inches. The triangular sides have a height of 11.9 inches. Surface area of the pyramid = 4 (one-half (9.4) (12.8)) + 9.4 squared = 329 square inches What error did Regina make? She should have used One-half (9.4) (11.9) to represent the area of a single triangle. She should have multiplied all the terms inside the parentheses by 4 when she simplified. She should have used One-half (4.7) (12.8) to represent the area of a single triangle. She should have used a different collection of shapes as the net of the pyramid.

y/x=18

step-by-step explanation:

answer: the price of one pound cabbage = $ 0.8

the point (10,8) represents that the cost of 10 pounds cabbage is $ 8

step-by-step explanation:

since, here is a proportional relation between the number of pounds of cabbage (x) and the price in dollars (y).

therefore, we can write,

⇒ y = k x

where k is the constant of proportionality.

now, point (5,4) is in the line.

thus, it will satisfies the above equation of line.

⇒ 4 = 5 k

⇒ k = 0.8

thus, the equation of the line is,

y = 0.8 x

a) for x = 1,

y = 0.8

therefore, the cost of one pound of cabbage is 0.8 dollars.

b) in the below graph (10,8) represents that the cost of 10 pounds of cabbage is 8 dollars.

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step-by-step explanation:

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