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3 years ago

Which expression is equivalent to 8(x + 2)?

Mathematics

2 answers:

enot [183]3 years ago

7 0

I’m 80% sure is C ....

ratelena [41]3 years ago

6 0

I believe it is C when you distribute: 8*x is 8x and 8*2 is 16

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A car is traveling at a speed of 65 mph. The car slows down 18 mph because of traffic, and then increases its speed by 13 mph. W

Svetlanka [38]

65-18+13=60
so 60 is your answer hope i helped

5 0

4 years ago

Read 2 more answers

What is the sequence for 10,20,40,80

Masja [62]

Answer:

each time it is increasing by twice the on before it

Step-by-step explanation:

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3 years ago

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Which relation is a function?

lina2011 [118]

Answer:

Step-by-step explanation:

For a relationship to be a function

Each value of x in the domain can only have 1 unique value of y in the range. That is, one-to-one correspondence.

The only relation which meets this criteria is B

7 0

4 years ago

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2. Using Vièta's theorem, find the solutions to the equation. a) x^2 - 3x + 2 = 0 b) x^2 + 2x - 15 = 0.

olga_2 [115]

Given:

$\begin{gathered} x^2-3x+2=0 \\ x^2+2x-15=0 \end{gathered}$

Required:

We need to find the solution by Vièta's theorem.

Explanation:

Compare 1st equation with

$ax^2+bx+c=0$

we get

$\begin{gathered} a=1 \\ b=-3 \\ c=2 \end{gathered}$

Vièta's theorem is

$\begin{gathered} x_1+x_2=-\frac{b}{a} \\ x_1x_2=\frac{c}{a} \end{gathered}$

$\begin{gathered} x_1+x_2=3 \\ x_1x_2=2 \end{gathered}$

now solve this equation and we get

$\begin{gathered} x_1=1 \\ x_2=2 \end{gathered}$

because addition of 1 and 2 is 3 and multiplication is 2

Now for 2nd equation

$\begin{gathered} a=1 \\ b=2 \\ c=-15 \end{gathered}$

apply Vièta's theorem

$\begin{gathered} x_1+x_2=-2 \\ x_1x_2=-15 \end{gathered}$

by this

$\begin{gathered} x_1=3 \\ x_2=-5 \end{gathered}$

because addition of 3 and -5 is -2 and multiplication is -15

8 0

1 year ago

A line passes through the two given points. Is it vertical, horizontal, or neither?

vova2212 [387]

To answer this question, let us find the slope using the coordinates:

(2, 1) and (3, 4)

1 - 4 / 2 - 3
-3 / -1
3

The slope is 3, so the answer is neither, since a horizontal line has a slope of 0 and the slope of a vertical line is undefined.

6 0

3 years ago