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3 years ago

Does anyone know this??

Mathematics

1 answer:

Mnenie [13.5K]3 years ago

5 0

Answer: 21

Step-by-step explanation: To solve this problem, we can first set up a proportion because we know that 3 is to 7 as 9 is to x.

So we have $\frac{3}{7} = \frac{9}{x}$ .

Now, we can use cross products to find the missing value.

So we have 3 time x which is 3x and 7 times 9 which is 63.

Rewriting our equation, we have 3x = 63.

Dividing both sides by 3, we find that <em>x = 21</em>.

So, <em>x = 21</em>.

The red arrows in the middle mean that they are parallel so the slopes are the same.

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time in minutes =t

we are given

A plane is descending into the airport. After 5 minutes it is at a height of 6500 feet

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