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marta [7]
2 years ago
13

The sum of 8n²- 3n + 10 and 3n² - 6n-7 is ?​

Mathematics
1 answer:
vampirchik [111]2 years ago
5 0

Step-by-step explanation:

= (8n² - 3n + 10) + (-3n² - 6n - 7)

= (8 - 3)n² + (-3 - 6)n + (10 - 7)

= 5n² - 9n + 3

Option → #1

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4 days I have 140 copies of a book, 9 days I only have 50 left. Write an equation where c(t)=my+b where c is number of copies st
alexandr402 [8]

Answer:

c(t)=-18t+212.

Step-by-step explanation:

We have been given that 4 days I have 140 copies of a book, 9 days I only have 50 left. We are asked to write an equation c(t)=my+b, where c is number of copies still on hand and t days being available.

We have two points on line (4,140) and (9,50). Now, we will use these points to find slope as:

m=\frac{140-50}{4-9}

m=\frac{90}{-5}

m=-18

Now, we will use point-slope form of equation y-y_1=m(x-x_1) and substitute m=-18 and coordinates of point (9,50) as:

y-50=-18(x-9)

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y-50+50=-18x+162+50

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Therefore, our required equation would be c(t)=-18t+212.

5 0
3 years ago
This is confusing very confusing for no reason
Aneli [31]

Answer:

I'm pretty sure it's 31

Step-by-step explanation:

perimeter you add all the sides

3 0
2 years ago
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Answer:

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y=mx + b

y=5x =2

m = slope therefore is 5

5 0
3 years ago
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