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2 years ago

If f(x)=3x^2-2x+1 find f(-2)

Mathematics

2 answers:

SIZIF [17.4K]2 years ago

8 0

Answer:

Step-by-step explanation:

3(-2)^2 - 2(-2) + 1

12 - 2(-2) + 1

12 + 5

Naddika [18.5K]2 years ago

5 0

Answer:

f(-2) = 3(-2)² - 2(-2) + 1 = 17

Step-by-step explanation:

f(x) = 3x² - 2x + 1

f(-2) = 3(-2)² - 2(-2) + 1

= 3 × 4 + 4 + 1

= 12 + 5

f(-2) = 17

Thus, f(-2) = 3(-2)² - 2(-2) + 1 = 17

<u>-TheUnknownScientist</u>

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Round the decimal to the nearest hundredths 983.625

r-ruslan [8.4K]

983.625
9 = hundreds
8 = tens
3 = ones
6 = tenths
2 = hundredths
5 = thousandths
You want to round to the nearest hundredths
Look at the number on the right, if it's bigger than 5, round up, if it's 4 or lower, round down.
In this case, the number to the right is a 5, so you round the 2 (hundredths) up one so:
<span>983.63</span>

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2 years ago

Kelsey had $65 to spend on books. Each book cost $5.50, and there was a $7.50 fee for shipping. She let b equal the number of bo

GuDViN [60]

Answer:

Let the number of books she can purchase = b

The cost of each book is $5.5 with an extra shipping of $7.5

So, the total cost of the books she can purchase = $5.5b+7.5$

Since, she had $65 to spend on the books.

The required inequality is $5.5b+7.5\leq 65$ .

So, according to the inequality above, we get,

The correct options are,

B. The inequality symbol is incorrect because she can spend up to and including $65.

C. The expression $5.5b+7.5$ is correct because $5.50 per book is $5.5b$ and that is added to the shipping fee of $7.50 to determine the total purchase price.

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3 years ago

Read 2 more answers

The area of a rectangle is 42 square inches and one side is 12 inches long find the perimeter of the rectangle show your work

uranmaximum [27]

So first of all we need to know that area is length times width
Area = L x W
since we know the area is 42 and the length is 12 lets plug those in
42 = 12 x W
now we dont know what W is yet but we can figure it out by dividing 42 by 12
42/12 = 3.5
So W = 3.5!
but its asking for the perimeter and we know that perimeter is all of the sides of the rectangle added up. Heres a picture

___3.5___
| |
| |
12 | | 12
| |
************
3.5

see now we just add those all up together:)

12 + 12 + 3.5 + 3.5 = 31!!
so our perimeter is 31 inches:)
have a good one
PICK ME BRAINLIEST!:D

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2 years ago

A sheet of standard U.S. typing paper measures 8.50 in by 11 in. What is its area in square centimeters? (Area =L x W)

jekas [21]

Answer:

the area would be 935cm

Step-by-step explanation:

ty for reading :P

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2 years ago

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Match the expressions given in words with their values when m=6.