Please explain how to do this

Mathematics

2 answers:

Bezzdna [24]3 years ago

6 0

First u gonna divide 39.4 by 16,5 u get 2,38

34kurt3 years ago

4 0

Since we know what one side is, there is another side equal to how that side looks like. So, the long sides are 16.5 + 16.5 = 33. Therefore, (39.4 - 33) / 2 will get you your answer.

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Adriana worked 38 hours last week. Her job pays $12 an hour. How much did she earn last week?

rusak2 [61]

Multiply the hours by how much she makes per hour.

38 * 12 = $456

Therefore, she made $456 last week.

Best of Luck!

5 0

3 years ago

Find the indicated sum for each sequence. S9 of –9, 36, –144, 576, ... A –585 B –471,861 C 1,887,435 D –471,852

Varvara68 [4.7K]

<h3>Answer: Choice B) -471,861</h3>

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Explanation:

This is a geometric sequence because each new term is found by multiplying the last term by -4.

The common ratio is r = -4. The first term is a = -9. We want to sum up n = 9 terms.

Use the geometric nth partial sum formula below to plug in the terms mentioned

$S_n = \frac{a*(1-r^n)}{1-r}\\\\S_9 = \frac{-9*(1-(-4)^9)}{1-(-4)}\\\\S_9 = \frac{-9*(1-(-262144))}{1+4}\\\\S_9 = \frac{-9*(1+262144)}{1+4}\\\\S_9 = \frac{-9*(262145)}{5}\\\\S_9 = \frac{-2359305}{5}\\\\S_9 = -471,861\\\\$