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miss Akunina [59]
3 years ago
12

Can someone help me solve this ?! Will mark brainliest

Mathematics
2 answers:
Elenna [48]3 years ago
7 0
Roberto has twice the mass his sister Mary has but runs at the same velocity as Mary. Will his kinetic energy be twice as much?

(Mary has a mass of 40 kg and sprints at 1 m/s)


Can someone help me with this (sorry I don’t have enough point for a question and no one has answered this and I’m confused)
Natalija [7]3 years ago
5 0

Answer:

The second, the third, and the last one

Step-by-step explanation:

The second is correct because we just multiply by 6 on both sides, thus not changing the value of the x

The third is correct because we just distribute the 6 into the parenthesis, and multiply the equal side by 6, thus just simplifying the expression, not changing it.

The last is correct because you just subtract 4 from both sides, and since done to both sides, doesn't change the equation.

Hope i helped you :)

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George takes a photograph of a rectangular window that is 312 feet tall and 134 feet wide. He prints the photograph on paper so
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Answer:

A':A = 1742:7

Step-by-step explanation:

Applying,

A' = L'W'............... Equation 1

Where A' = Area of the window, L' = Length of the window, W' = Width of the window.

From the question,

Given: L' = 312 ft, W' = 134 ft

A' = (312×134)

A' = 41808 ft²

Similarly,

A = LW.................. Equation 2

Where A = Area of the image of the window, L and W is thw length and width of the image of the window

Given: L = 12 ft, W = 14 ft

Therefore,

A = 12×14

A = 168 ft²

Therefore the ratio of A' to A = 41808:168 = 1742:7

A':A = 1742:7

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