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4 years ago

Find f(-7) if f(x) = 2x + 8.A. -6 B. 2 C. 3 D. 22

Mathematics

1 answer:

spayn [35]4 years ago

7 0

To find f(-7), just plug -7 in for all x

2(-7) + 8
-14 + 8
-6 is the answer!

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Please help me with A,B,c,D

g100num [7]

Answer:

wat is this, my g this looks like a test

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3 years ago

Find the width of a rectangle 25 feet and the perimeter is 80

lukranit [14]

$\huge\underline{\red{A}\blue{n}\pink{s}\purple{w}\orange{e}\green{r} -}$

Given - a rectangle with length 25 feet and perimeter 80 feet

To calculate - width of the rectangle

We know that ,

$\bold{Perimeter \: of \: rectangle = 2(l + b)} \\$

where b = width / breadth of rectangle

‎ ‎ ‎

substituting the values in the formula stated above ,

$\bold{80 = 2(25 + b)} \\ \\\bold{ \implies \: 25 + b = \cancel \frac{80}{2} } \\ \\ \bold{\implies \: 25 + b = 40 }\\ \\ \bold{\implies \: b = 40 - 25 }\\ \\\bold{ \implies \: b = 15 \: feet}$

hope helpful ~

3 0

2 years ago

Read 2 more answers

Solve the following equation by first writing the equation in the form ax² = c

alexandr1967 [171]

The solution to the given equation is x = ±7. The correct option is d. x = ±7

<h3>Solving quadratic equations </h3>

From the question, we are to determine the solution to the given equation

The given equation is

x²-49 = 0

NOTE: I assumed the variable is x

Solving the equation

x²-49 = 0

Writing in the form ax²= c

x² = 49

∴ x = ±√49

x = ±7

Hence, the solution to the given equation is x = ±7

Learn more on Solving quadratic equations here: brainly.com/question/24334139

#SPJ1

3 0

2 years ago

Solve each expression using the correct order of operations, 7- 5 + 3 x 10

Lynna [10]

Answer:

28 is your answer

Step-by-step explanation:

you start with multiplication and continue with addition and then go to subtraction

5 0

3 years ago

Read 2 more answers

PLEASE HELP.

Setler79 [48]

Yes you can and you do that by multiplying $42×1.30=54.60 and then $54.60×1.25=68.25

8 0

3 years ago

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Find f(-7) if f(x) = 2x + 8.A. -6 B. 2 C. 3 D. 22​

Find f(-7) if f(x) = 2x + 8.A. -6 B. 2 C. 3 D. 22