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Neko [114]
3 years ago
13

Explain how to simplify this expression:

Mathematics
2 answers:
ycow [4]3 years ago
7 0

Answer:

11a+2

Step-by-step explanation:

(7a+9)+(4a−7)

7a+4a+9-7

11a+2

Morgarella [4.7K]3 years ago
7 0

Answer:

11a + 2

Step-by-step explanation:

(7a+9)+(4a-7)

Take out parenthesis

7a + 9 +4a - 7

add like terms

11a +2

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Which relationship is NOT a function?<br><br> HELPPP!!!!!!!!!! HELP!!!!!!
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I think that it is the one on the bottom left

Step-by-step explanation:

I am so sorry if it is wrong he he

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3 years ago
Noah tried to prove that cos(θ)=sin(θ) using the following diagram. His proof is not correct.
alukav5142 [94]

Answer:

The first statement is incorrect. They have to be complementary.

Step-by-step explanation:

You can't say the measure of angle B is congruent to theta because it is possible for angles in a right triangle to be different.

You can only say that what he said is true if the angle was 45 degrees, but based on the information provided it is not possible to figure that out.

The other two angles other than the right angle in a right triangle have to add up to 90 degrees, which is the definition of what it means for two angles to be complementary. A is the correct answer.

3 0
3 years ago
Read 2 more answers
James, Priya, and Siobhan work in a grocery store. James makes $7.00 per hour. Priya makes 40% more than James, and Siobhan make
oksian1 [2.3K]

Answer:

The per hour income of Siobhan is $9.31 per hour.

Step-by-step explanation:

Working in a grocery store James makes $7.00 per hour. Priya's hourly income is 40% more than James, and Siobhan's  hourly income is 5% less than Priya.

Therefore, using formula of percentage, the per hour income of Priya will be

7.00(1 + \frac{40}{100}) = 7 \times 1.4 = 9.8 dollars per hour.

Again, the per hour income of Siobhan is 9.8(1 - \frac{5}{100}) = 9.8 \times 0.95 = 9.31 dollars per hour. (Answer)

6 0
4 years ago
The table shows the distances a runner covers in one week how much farther does she run on Thursday than friday
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4 years ago
Which statement is true about the parts of this expression?
Ipatiy [6.2K]

7.5y - z/9 + 50 + 2y

Okay, so it would be best to organize and simplify this expression: 9.5y -z/9 + 50

Alright, now let's eliminate some answers.

True or false: The constant is 7.5. This is <em>false. </em>7.5 is a coefficient, 50 is a constant.

True or false: The coefficients are 7.5 and -9. This is <em>false. </em>Sure, 7.5 is a coefficient, but -9 is not. Actually, z/9 is also equal to (1/9)z, so <em>technically </em>1/9 is the coefficient.

True or false: The variables are x and y. This is <em>false. </em>Where is x? Nonexistent.

True or false: The like terms are 7.5y and 2y. This is <em>true. </em>When we simplified the equation, we first combined like terms. 7.5y and 2y are like terms and therefore able to be combined. That's how we got 9.5y.

The answer, I believe, is D. Hope this helps!

5 0
3 years ago
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