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Nuetrik [128]
3 years ago
13

If f(x)=81, what is x?

Mathematics
1 answer:
Allushta [10]3 years ago
7 0

Answer:

There's not enough information...

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2(x-1)+8=4x-20 find the solution<br> (15 points)
Alenkasestr [34]

Answer:

13

Step-by-step explanation:

2(x-1)+8=4x-20

distribute 2

2x-2+8=4x-20

2x+6=4x-20

subtract 2x from both sides

6=2x-20

add 20 to both sides

26=2x

divide both sides by 2

x=13

Please rate brainliest if this helped you.

8 0
3 years ago
Read 2 more answers
Which relation is a function?(click all that apply)
iris [78.8K]

Answer:

Step-by-step explanation:

y=2x+1

y=x^2

The other one isn't a function because it won't pass the vertical line test. You can not use the same X in a function.

5 0
3 years ago
What is the solution to the system of equations below?
sattari [20]

Answer:

<h2>x = 9, y = -36 → (9, -36)</h2>

Step-by-step explanation:

y=-3x-9\qquad(1)\\\\y=\dfrac{1}{3}x-39\qquad(2)\\\\\text{Substitute (1) to (2)}\\\\-3x-9=\dfrac{1}{3}x-39\qquad\text{multiply both sides by 3}\\\\-9x-27=x-117\qquad\text{add 27 to both sides}\\\\-9x=x-90\qquad\text{subtract}\ x\ \text{from both sides}\\\\-10x=-90\qquad\text{divide both sides by (-10)}\\\\x=9

\text{Put the value of x to (1):}\\\\y=-3(9)-9\\\\y=-27-9\\\\y=-36

7 0
3 years ago
Sebastien hand-crafts circular braided rugs. The graph shows the prices of various sizes of his rugs. A customer ordered 3 ident
elixir [45]

Answer:

The radius of each rug on the order is 6 ft

Step-by-step explanation:

The graph shows the relationship between the price of a rug and the radius of the rug

The number of rugs ordered by the customer = 3 rugs

The total cost of the rugs ordered by the customer = $1,350

Therefore, the cost of each rug = $1,350/3 = $450

The radius of the rugs as determined from the chart

At $450, the radius of the rug = 6 ft

Therefore;

Given that all the rugs are identical, the radius of each rug on the order = 6 ft.

6 0
3 years ago
My'chael has read 120 pages, which is 45% of a book. How many<br> pages are in the book?
Mars2501 [29]

Answer:

266.67

Step-by-step explanation:

120=.45(x)

x=266.67

7 0
3 years ago
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