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Scrat [10]
3 years ago
9

Please answer 7 and 8 for mark as brainliest

Mathematics
1 answer:
maria [59]3 years ago
8 0
7) A. A variable is an unknown value, and x is unknown. Constants are known values so they cannot have X in it.

8)A again for the same reason as number 7
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Why is 2(x+9) + 4x an expression and not an equation?​
s2008m [1.1K]

Answer:

because it doesn't have an equal sign.

Step-by-step explanation:

5 0
3 years ago
Read 2 more answers
16. A plastic tray is shown, with the dimensions
Virty [35]

Answer:

calculate it. its not cheating, its like flash cards but better, besides its made for that reason.;)

Step-by-step explanation:

7 0
3 years ago
A supermarket chain gathers data on the amount they spend on promotional material (e.g., coupons, etc.) and sales revenue genera
vazorg [7]
Answer: The predictor variable in this problem is the amount spent on promotional material.

Explanation: 

A predictor variable refers to variable needed to make a prediction of another variable. If we analyze the problem, we notice that the supermarket chain is predicting the sales revenue generated because once the supermarket spends on promotional material, it will result to sales revenue. Thus, the predictor variable is the amount spent on promotional material.
8 0
3 years ago
Urgent please help..
Katyanochek1 [597]

Answer:

18π

Step-by-step explanation:

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Plug in the numbers into the equation.

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6 0
3 years ago
In 2017 there were enough renewable energy sources to supply a total of 9309 megawatts of electricity in a country. This graph s
STatiana [176]

Approximately 1700 megawatts of electricity could be supplied by Hydropower in 2017. Option B is correct.

Given that,
In 2017 there were enough renewable energy sources to supply a total of 9309 megawatts of electricity in a country. The graph shows the proportions that the different renewable energy sources could supply.

<h3>What are percentages?</h3>

the percentage is the ratio of the composition of matter to the overall composition of matter multiplied by 100.

Here, from the graph contribution of the hydropower is 18.2%.
So the electricity produced through hydropower is,
= 9309 * 18.2%
= 9309 * 18.2/100
= 1694.23
≈ 1700 megawatts

Thus, approximately 1700 megawatts of electricity could be supplied by Hydropower in 2017.

Learn more about percentages here:

brainly.com/question/13450942

#SPJ1

5 0
1 year ago
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