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tia_tia [17]
3 years ago
10

Given ƒ(x) = 3x + 9, find x when ƒ(x) = 21.

Mathematics
2 answers:
Dima020 [189]3 years ago
7 0
3x + 9 = 21
3x = 12
x = 4
maksim [4K]3 years ago
6 0

Answer:

4

Step-by-step explanation:

ƒ(x) = 3x + 9; Substitute 21 for ƒ(x).

21 = 3x + 9

21 − 9 = 3x

12 = 3x → x = 4

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What is y=2x-5 and x+3y=27 graphed
alex41 [277]

Answer:

See attachment

Step-by-step explanation:

The first function is y=2x-5.

The slope is m=2 and the y-intercept is b=5.

The second equation is x+3y=27.

The slope intercept form is y=\frac{1}{3}x+9

The slope is m=\frac{1}{3} and y-intercept is b=9

The graph of these two functions is shown in the attachment.

5 0
4 years ago
Simplify the expression -2x2(4x − 3).
Pepsi [2]
First you have to multiply -2 and 2 which is -4x.

Then your going to distribute -4 to 4x which is -16x.

Now your going to distribute -4 and -3 which is 12.

So your simplified expression would be -16x + 12
8 0
3 years ago
Read 2 more answers
Last holiday season, you bought 7 gifts, each of which cost $10. This season, you need to buy gifts for 10 people with the same
gladu [14]
$10 plus $10= $1
cause you now buying for 10 people with $10.
3 0
4 years ago
When x represents whole numbers less than 200, the function f(x) = 2x - 20 represents the profit earned from selling x carnation
solmaris [256]

Answer:

260

Step-by-step explanation:

When x represents whole numbers less than 200, the function  

f(x) = 2x - 20 .......... (1)

represents the profit earned from selling x carnations for a school fund-raiser.

Therefore, the profit earned from selling 140 carnations for the school fund-raiser will be given by the equation (1) as

f(140) = 2(140) - 20 = 280 - 20 = 260.

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8 0
4 years ago
Find the area of grass in this home landscape diagram.
lesya [120]
From the picture, the grass is only occupying the pink shaded area. Hence, we need to get the measurement of the pink shaded area only.
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2.) Get the are of the other parts of the diagram
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A = 40 ft. * 30 ft.
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A = 20 ft. * 15 ft.
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3.) Subtract the total measurement of the other parts from the measurement of the whole diagram
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4.) Therefore, A.) 13,300 sq. ft. is the area of grass in the home landscape diagram.
4 0
3 years ago
Read 2 more answers
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