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3 years ago

4x+8+2×-7 idk what this is

Mathematics

2 answers:

lukranit [14]3 years ago

8 0

Answer:

6x+1

is that one of your choices ?

Nata [24]3 years ago

7 0

Answer:

4x-6

Step-by-step explanation:

first you multiply the 2 and the -7 to get -14.

afterwards you add the 8 and the -14 to get -6.

you can't do anything with the 4x because we don't know what the x is.

Your answer should be 4x-6.

All of this is easily solved using PEMDAS

(parentheses, exponents, multiplication, division, addition, subtraction)

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Which is the solution to this system of equations? 2x+y=8 2x+y=4

Sav [38]

Answer:

2x+y=8

x=3 y=2

2x+y=4

x=1.5 y=1

Step-by-step explanation:

I dont have a step by step answer but i hope this helps!

6 0

3 years ago

Help please!!!!!!!!!!!!!!!!!!!!!!!!

Svet_ta [14]

I would say y = sin(x + 2).

Why?

1. Is it the sine function for sure.

2. The function y = sinx is moved two places to the right as indicated by the +2.

3. The function y = sin(x + 2) crosses the point (2,0).

6 0

3 years ago

Will give Brainliest! if right! Use the box-and-whisker plot find the range of the data.

k0ka [10]

Range = 100 - 50 = 50

answer is 50

3 0

3 years ago

Read 2 more answers

A digital music player has a retail price of 85$ the percent of markup is 140% what is the final price after the markup? (Show w

zhannawk [14.2K]

Answer: $119

Step-by-step explanation:

Let's take this equation

85(n)

n will equal 1.40 as the price mark up is 140%

85(1.40)

$119

8 0

3 years ago

Find the inverse of the following function. Then prove they are inverses of one another.

solmaris [256]

Answer: $\dfrac{x^2+1}{2}$

Step-by-step explanation:

Given

$f(x)=\sqrt{2x-1}$

We can write it as

$\Rightarrow y=\sqrt{2x-1}$

Express x in terms of y

$\Rightarrow y^2=2x-1\\\\\Rightarrow x=\dfrac{y^2+1}{2}$

Replace y be x to get the inverse

$\Rightarrow f^{-1}(x)=\dfrac{x^2+1}{2}$

To prove, it is inverse of f(x). $f(f^{-1}(x))=x$

$\Rightarrow f(f^{-1}(x))=\sqrt{2\times \dfrac{x^2+1}{2}-1}\\\\\Rightarrow f(f^{-1}(x))=\sqrt{x^2+1-1}\\\\\Rightarrow f(f^{-1}(x))=x$

So, they are inverse of each other.

8 0

3 years ago

4x+8+2×-7 idk what this is ​

4x+8+2×-7 idk what this is