All categories

3 years ago

How to solve 2x+5 if x equals 7

Mathematics

1 answer:

tatuchka [14]3 years ago

6 0

Answer:

2(7) + 5 = 19

Step-by-step explanation:

Okay, so do it like this:

2x+5

x = 7

2(7) + 5

2(7) = 2 x 7

2 x 7 = 14

Now it's 14 + 5

14 + 5 = 19

Your answer is 2(7) + 5 = 19

You might be interested in

If f(x) =69-15x then f(f^-1(x))

xenn [34]

If f(x)=69-15x then $f(f^{-1}(x))=x$

Given :

$f(x)=69-15x\\$

Lets find out $f^{-1}(x)$ . The steps to find out f inverse are

Replace f(x) by y

$y=69-15x\\Interchange \; the \; variables\\x=69-15y\\solve \; for \; y\\x-69=-15y\\Divide \; by \; -15\\\frac{-x+69}{15} =y\\Replace \;y \;with \; f^{-1}\\f^{-1}=\frac{-x+69}{15}$

Now we find $f(f^{-1}(x))$

Replace inverse function in the place of x in f(x)

$f(f^{-1}(x))=f(\frac{-x+69}{15} )=69-15(\frac{-x+69}{15})=69-(-x+69)=69+x-69=x\\f(f^{-1}(x))=x$

Learn more :

brainly.com/question/11242094

8 0

2 years ago

21. What must be added to -9 to have a sum of 20?

Inga [223]

Answer:

21C

22D

23B

24C

25A

Step-by-step explanation:

7 0

2 years ago

Read 2 more answers

In how many different orders can you line up 8 cards on a table

Fynjy0 [20]

You can line up 8 cards 64 different ways.

8 * 8 = 64

3 0

3 years ago

Read 2 more answers

Which is a solution to the system of inequalities? y≤-1/2x+3 y≥x+1

Serggg [28]

Answer:

y≤-1/2(x=4)+3

Step-by-step explanation:

4 0

3 years ago

How much wood could a wood chuck chuck if a wood chick could chuck wood

Mariulka [41]

<em>Answer: “As much wood as a woodchuck could chuck, If a woodchuck could chuck wood.) Researchers at Cornell determined that a woodchuck could chuck about 700 pounds: </em>

8 0

3 years ago

Read 2 more answers