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Anton [14]
3 years ago
14

If f(x) = 5 + 4(x - 4)?, what is f(7)?

Mathematics
1 answer:
grigory [225]3 years ago
3 0

Answer:

Let's solve for f.

x=5+4(x−4)f(7)

Step 1: Flip the equation.

28fx−112f+5=x

Step 2: Add -5 to both sides.

28fx−112f+5+−5=x+−5

28fx−112f=x−5

Step 3: Factor out variable f.

f(28x−112)=x−5

Step 4: Divide both sides by 28x-112.

f(28x−112)28x−112=x−528x−112

f=x−528x−112

Answer:

f=x−528x−112

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levacccp [35]
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So, your equation should look like:
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Then you'd follow the subtraction and division property, so your next moves will look as the following:
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There is a discount of sale of 20% off of a $450 pair of skis how much is the discount ?
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Step-by-step explanation:

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Step-by-step explanation:

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The amount spent on heating depends on the average temperature
anastassius [24]

That's D.


A(t) is the amount as a function of the temperature t.



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WILL GET BRANLIEST
erma4kov [3.2K]

Answer:

The correct options are;

Answer to A1 is D

Answer to A2 is D

Answer to A3 is D

Answer to A4 is D

Answer to A5 is D

Answer to A6 is D

Answer to A7 is D

Answer to A8 is D

Answer to A9 is D

Answer to B1 is I

Answer to B2 is I

Answer to B3 is I

Answer to B4 is I

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Step-by-step explanation:

The given function is f(x) = 9·x² + 54·x - 66

The extremum of the function are found as follows;

d(f(x))/dx = 0 = d(9·x² + 54·x - 66)/dx = 18·x + 54

∴ 18·x + 54 = 0 at the maximum or minimum points

x = -54/18 = -3

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1) Points to the left of x = -3 are decreasing

2) Points to the right of x = -3 are increasing.

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