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2 years ago

Please help me thanks :)

Mathematics

1 answer:

Lina20 [59]2 years ago

8 0

Answer:

Step-by-step explanation:

To sovle this we must combine the numbers togther and the variables togther.

We have:

8c+6-3c-2

Lets take out the c's and combine them:

8c -3c

Now lets take out the numbers:

6-2

Now lets put these back together and we get the expression:

5c+4

This looks like A.

Hope this helps! :D

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What is the measure of ∠DBE?

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63 degree

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Question

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The equation that shows the profit earned for selling popcorn for x hours is y = $15m - $20

From the equation of the linear function given y = mx + b

y indicates the profit earned and x represents the time in hours.

From the question,

After 3 hours, the popcorn stand earned a profit of $25.

∴ The equation becomes $25 = 3m + b ------ (1)

and after 6 hours, the profit was $70.

∴ The equation becomes $70 = 6m + b ------- (2)

Now, we will solve the two equations simultaneously

From the first equation

$25 = 3m + b

We can write that

b = $25 - 3m ------- (3)

Substitute this into the second equation

$70 = 6m + b

We get

$70 = 6m + ($25 - 3m)

$70 = 6m + $25 - 3m

$70 - $25 = 6m - 3m

$45 = 3m

∴ m = $45 ÷ 3

m = $15

Now, substitute the value of m into equation (3)

b = $25 - 3m

b = $25 - 3($15)

b = $25 - $45

b = -$20

∴ m = $15 and b = -$20

Putting these values into the equation y = mx + b we get

y = $15m +(- $20)

∴ y = $15m - $20

Hence, the equation that shows the profit earned for selling popcorn for x hours is y = $15m - $20

Learn more here: brainly.com/question/19511111

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2 years ago

The axis of symmetry for the function f(x) = −x2 − 10x + 16 is x = −5. What are the coordinates of the vertex of the graph?

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<h2>Answer with explanation:</h2>

The confidence interval for population mean is given by :-

$\overline{x}\pm z_{\alpha/2}\dfrac{\sigma}{\sqrt{n}}$

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Standard deviation : $\sigma= 0.69^{\circ}F$

Significance level : $\alpha: 1-0.99=0.01$

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