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3 years ago

If you can just help me with one question it would help very very much:)

Mathematics

1 answer:

allsm [11]3 years ago

6 0

For question 1, it is important to know the vertical angles are angles that are equal to each other because they are congruent and are "across" from each other when two lines intersect. Therefore, you can set an equation where one side is equal to the other as you are solving for x, which would be 2x=x+30. You may then solve this equation like any other equation based on mathematical properties and operations, whereas this is how you may do question #1.

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2 years ago

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3 years ago

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3 years ago

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2 years ago

The height that a ball bounces varies directly with the height from which it is dropped. A certain ball bounces 30 cm when dropp

Akimi4 [234]

The ball will bounce 72 cm high if dropped from a height of 120 cm

<u>Solution:</u>

Given, The height that a ball bounces varies directly with the height from which it is dropped.

A certain ball bounces 30 cm when dropped from a height of 50 cm.

We have to find how high will the ball bounce if dropped from a height of 120 cm?

Now, according to given information,

When dropped from 50 cm ⇒ bounces 30 cm

Then, when dropped from 120 cm ⇒ bounces "n" cm

Now by Chris cross method, we get,

$\begin{array}{l}{n \times 50=30 \times 120} \\\\ {\rightarrow n=\frac{30 \times 120}{50}} \\\\ {\rightarrow n=\frac{3600}{50}} \\\\ {\rightarrow n=72}\end{array}$

Hence, the ball bounces 72 cm high.

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3 years ago