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2 years ago

Let f(x) = x2 - 8x 5. Find f(-1).

2 answers:

8 0

In the equation you have to replace all x's with -1

f (-1) = (-1)^2 - 8(-1) +5
f (-1) = 1 + 8 + 5
f (-1) = 14

the f(-1) stand for the function of -1. it is also equivalent to y

fenix001 [56]2 years ago

3 0

Answer:

f(-1)=14

Step-by-step explanation:

Given : Function - $f(x)=x^2-8x+5$

To find : The value of f(-1)

Solution : Follow the steps :

Step 1- Write the function

$f(x)=x^2-8x+5$

Step 2- Put x=-1 to find the value of f(-1)

$f(-1)=(-1)^2-8(-1)+5$

Step 3- Solve the above equation

$f(-1)=1+8+5$

$f(-1)=14$

Therefore, f(-1)=14

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3 years ago

Which algebraic expression represents one-fifth of x less than 6.2?

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3 years ago

Solve the system by the<br> substitution method.<br> 7x + y = -6<br> 7x - 3y = 18

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3 years ago

Read 2 more answers

Choose the problem modeled by the picture.

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Answer:

B) 1/4 × 3/6 = 3/24

Step-by-step explanation:

1/4 of the rectangles are colored blue(ish).

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The problem statement with these numbers in it is that of choice B.

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3 years ago

Mr. Autry bought a hat for $99.90. He also bought a pair of boots for $89.90. What was the total cost of the hat and boots inclu

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Answer:

$204.98

Step-by-step explanation:

Step 1: Add both item cost

$99.90 + 89.90 = 189.80$

Step 2: Find the sales tax of the result

$\frac{8}{100}\times 189.8 = 15.184$

Step 1: Convert 8% to fraction
$8\%= \frac{8}{100}$
Simplify
$\frac{8}{100} = \frac{2}{25}$
Step 2: Convert 189.80 to a fraction
$189.80 = \frac{189.8}{1}$
Step 3: Set it up
$\frac{2}{25}\times \frac{189.8}{1}$
Step 4: Cross divide
$189.80 \div 25 = 7.592\\2 \div 1 = 2$
Step 5: Multiply the result
$7.592 \times 2 = 15.184$

Step 3: Add the result from the total cost of both items

$189.80 + 15.184 = 204.98$

The total cost of the hats and boots including sales tax is 204.98 dollars

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2 years ago