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3 years ago

I have no clue what I’m doing.

Mathematics

2 answers:

motikmotik3 years ago

6 0

C. 102 should be correct

alukav5142 [94]3 years ago

4 0

The answer is C.) 102 .. multiply 120 by the 15% as a decimal sooo 120x.15 = 18. now subtract 18 from 120 and get 102 :)

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dalvyx [7]

Answer with Step-by-step explanation:

We are given that

$f(x)=\frac{3x-1}{x}$

For each real number $x\neq 0$

To prove that f is one -to-one.

Proof:Let $x_1$ and $x_2$ be any nonzero real numbers such that

$f(x_1)=f(x_2)$

By using the definition of f to rewrite the left hand side of this equation

$f(x_1)=\frac{3x_1-1}{x_1}$

Then, by using the definition of f to rewrite the right hand side of this equation of $f(x_1)=f(x_2)$

$f(x_2)=\frac{3x_2-1}{x_2}$

Equating the expression then we get

$\frac{3x_1-1}{x_1}=\frac{3x_2-1}{x_2}$

$3x_1x_2-x_2=3x_2x_1-x_1$

$3x_1x_2-3x_1x_2+x_1=x_2$

$x_1=x_2$

Therefore, f is one-to-one.

6 0

3 years ago

The sides of the rectangle are in the ratio of 4:7. If its length is 31.5 in., find the width, the perimeter, and the area of th

AveGali [126]

Let $\ell$ the length and $w$ the width. By the ratio of the sides:

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Now, we'll find the perimeter p. We'll use the formula below:

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The area of a rectangle is $S=w\cdot\ell$ . Then:

$S=w\cdot\ell\\\\
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3 years ago

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Andrei [34K]

Answer:

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SD: 32.8

Step-by-step explanation:

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