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marin [14]
2 years ago
6

Can someone please solve this? a-3 Times a+7

Mathematics
2 answers:
Colt1911 [192]2 years ago
8 0
You have to combine like terms.
Answer: -2a+7 

3241004551 [841]2 years ago
5 0
The answer is <span><span>a^2</span>+<span>4a</span></span>−<span>21. use the foil technique. (First, Outer, Inner, Last)</span>
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maksim [4K]

The <em>correct answer</em> is:

400,000.

Explanation:

The third digit in 399 is 9. To round to this place value, we inspect the digit behind it. If the digit is 5 or greater, we round up; if it is less than 5, we round down.

The digit behind 9 is 7. Since it is greater than 5, we round up. This would ordinarily put the number up 1; however, doing that makes the 9 a 10, which in turn makes the next number 10, and the next number 4. This gives us 400,000.

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Answer:

D

Step-by-step explanation:

So we want to find<em> θ. </em>We are already given the hypotenuse and the side length opposite to <em>θ. </em>Therefore, we can use the trig function sine to find <em>θ. </em>

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Plug in 10.2 for the opposite side and 15 for the hypotenuse:

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Solve for <em>θ. </em>Use a calculator:

\theta=\sin^{-1}(10.2/15)\\\theta\approx42.8436\textdegree

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