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svlad2 [7]
2 years ago
11

F (x) = x^2 + 4x; Find f (−7)

Mathematics
1 answer:
elena-14-01-66 [18.8K]2 years ago
4 0

Answer:

f(-7) = 21

General Formulas and Concepts:

<u>Pre-Alg</u>

  • Order of Operations: BPEMDAS

Step-by-step explanation:

<u>Step 1: Define</u>

f(x) = x² + 4x

f(-7) is x = -7

<u>Step 2: Solve</u>

  1. Substitute:                    f(-7) = (-7)² + 4(-7)
  2. Evaluate:                       f(-7) = 49 + 4(-7)
  3. Multiply:                        f(-7) = 49 - 28
  4. Subtract:                       f(-7) = 21
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An isosceles trapezoid has bases of lengths 6 and 8 and a height of 16. Find the area.
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Answer:

Step-by-step explanation:

In an isosceles trapezoid, the opposite sides are equal.

The formula for determining the area of a trapezoid is expressed as

Area = 1/2(a + b)h

Where

a and b are the length of The bases are the 2 sides of the trapezoid which are parallel with one another.

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From the information given,

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3 0
3 years ago
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There were 326 students at the high school dance. There were 24 more girls than boys. How many girls and boys attended?​
abruzzese [7]

Answer:

187 girls 139 boys

Step-by-step explanation:

first you divide 326 by 2 to get 163, and then you add 24 to it to find how many girls and then you subtract 24 from it to find how many boys

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a new car is purchased for 207000 dollars. the value of the car depreciates at 11% per year. what will the value of the car be,
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Final price:
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