4 years ago

Simplify the following expression: 35 + (–13) + (+8) – (–6).

Mathematics

1 answer:

Ann [662]4 years ago

6 0

35 + (-13) + 8 - (-6) = 22 + 8 - (-6) = 30 - (-6) = 36

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I tried solving this but I accidentally tried figuring out what it would be if it was decreased by 15% instead of increased so n

olganol [36]

Answer:

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Step-by-step explanation:

1.15x = 138

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Check:

before increase + increase = sold

120 + 120(.15) = 138

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3 years ago

I need help on this problem

Arte-miy333 [17]

Answer: $QR=4.04$

Step-by-step explanation:

For this exercise you must use the followinG Trigonometric Identity:

$tan\alpha=\frac{opposite}{adjacent}$

In this case, given the right triangle PQR, you can identify that:

$\alpha=60\°\\opposite=PR=7.0\\adjacent=QR$

Then, the next step is to substitute those values into $tan\alpha=\frac{opposite}{adjacent}$ :

$tan(60\°)=\frac{7.0}{QR}$

And the final step is to solve for "QR" in order to find its value.

So you get that this is:

$(QR)(tan(60\°))=7.0\\\\QR=\frac{7.0}{tan(60\°)}\\\\QR=4.04$

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3 years ago

Was it evaluated correct?<br>explain your reasoning

natali 33 [55]

Answer:

Yes

Step-by-step explanation:

Yes. They did exponents and grouping symbols first, then multiplication and division left to right. Addition came before multiplication and division because it was inside a grouping symbol.

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3 years ago

Erin earned 68 points on her last test. If there were 80 possible points, what was

Dmitrij [34]

Answer:

85 percent

Step-by-step explanation:

68 out of 80 = 68/80

= 0.85, times 100

= 85 percent

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3 years ago

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Step-by-step explanation:

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