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Nadya [2.5K]
3 years ago
15

Find f(-3), f(-1), and f(1)

Mathematics
1 answer:
suter [353]3 years ago
3 0

Answer:

I will just show you how to substitute.

Step-by-step explanation:

all you have to do is just plug f(x) into the number you want. So if you see any x's, all you gotta do is plug that number after f for x.

So an example of an equation for one of your number is:

f\left(x\right)=x^2+x

you then want to plug the number after f for the x's. (I'm doing f(-3).

f\left(-3\right)=\left(-3\right)^2-3

You then should get the equation above.

after that you solve.

f\left(-3\right)=9-3

f\left(-3\right)=6

just follow these steps and you should be fine :))

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For the formula F = 95K – 455.67, what is the value of K when F = 0?
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Answer:

<em>K = 4.8</em>

Step-by-step explanation:

<u>Equation Solving</u>

We are given the equation:

F = 95K - 455.67

We are required to find the value of K when F=0:

95K - 455.67 = 0

Adding 455.67:

95K = 455.67

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Given the function f(x) = 3|x – 2| + 6, for what values of x is f(x) = 18?
Gwar [14]

Answer:

x = - 2, x = 6

Step-by-step explanation:

Given f(x) = 18 we require to solve

3 | x - 2 | + 6 = 18 ( subtract 6 from both sides )

3 | x - 2 | = 12 ( divide both sides by 3 )

| x - 2 | = 4

The absolute value function always returns a positive value, however, the expression inside can be positive or negative, thus

x - 2 = 4 ( add 2 to both sides )

x = 6

OR

- (x - 2) = 4

- x + 2 = 4 ( subtract 2 from both sides )

- x = 2 ( multiply both sides by - 1 )

x = - 2

As a check substitute these values into the left side of the equation and if equal to the right side then they are the solutions

x = 6 → 3|6 - 2| + 6 = 3|4| + 6 = 3(4) + 6 = 12 + 6 = 18 ← True

x = - 2 → 3|- 2 - 2| + 6 = 3|-4| + 6 = 3(4) + 6 = 12 + 6 = 18 ← True

Hence solutions are x = - 2, x = 6

7 0
3 years ago
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R= 28/9. Hope this helps
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Step-by-step explanation:

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3 years ago
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