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sergey [27]
3 years ago
15

What is the inverse of the function f(x) = 2x + 1?

Mathematics
1 answer:
Alexandra [31]3 years ago
6 0

Answer:

f^{-1}(x) = \frac{x-1}{2}

Step-by-step explanation:

let y = f(x) and rearrange making x the subject, that is

y = 2x + 1 ( subtract 1 from both sides )

y - 1 = 2 ( divide both sides by 2 )

\frac{y-1}{2} = x

Change y back into terms of x and let x = f^{-1} (x), thus

f^{-1}(x ) = \frac{x-1}{2}

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What is 2x2+2 mmmmmmmmmmmmmmmmmmm
Amanda [17]

Answer:

6

Step-by-step explanation:

2x2=4

4+2=6

:D

7 0
2 years ago
Wyatt uses 3.15 cups of flour in a recipe that makes 9 shortcakes. Cora uses 2.4 cups of flour in a recipe that makes 8 shortcak
ruslelena [56]
The number of cups of flour per shortcake in Wyatt's recipe is given by

\frac{3.15}{9} =0.35

The number of cups of flour per shortcake in Cora's recipe is given by

\frac{2.4}{8} =0.3

The number of more cups of flour needed by Cora is given by 0.35 - 0.3 = 0.05 cups.
6 0
3 years ago
Suppose you had 450$ in your account. What percent of money did you spend? Round your answer to the nearest percent
Lena [83]
Tbh idk I just need more points so I guess it's like alot or maybe a little but ask someone who knows
8 0
3 years ago
What is this simplified? Please help
Naya [18.7K]

Answer:

The end result is -1/(x + 1)

Step-by-step explanation:

In order to find the answer to this, we first need to factor the denominator. Since it is a quadratic, we try to find number that multiply to the last term (8) and add to the middle term (9). In this case, the numbers 8 and 1 would work. This allows us to use those numbers in parenthesis along with x as a fully factored form.

x^2 + 9x + 8 = (x + 1)(x + 8)

Now that we have this factored we can take the original equation and factor a -1 out of the top.

(-1)(x + 8)/(x + 1)(x + 8)

Since there is an (x + 8) on the top and bottom, we can cancel those.

-1/(x + 1)

6 0
3 years ago
Which is the equation of the line that passes through the points (-4, 3) and (2, -6)?
olga55 [171]

Answer:

B) y=-3/2x-3

Step-by-step explanation:

m=(y2-y1)/(x2-x1)

m=(-6-3)/(2-(-4))

m=-9/(2+4)

m=-9/6

simplify

m=-3/2

y-y1=m(x-x1)

y-3=-3/2(x-(-4))

y-3=-3/2(x+4)

y=-3/2x-12/2+3

y=-3/2x-6+3

y=-3/2x-3

8 0
2 years ago
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