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3 years ago

7

Find the value of x.

1 answer:

eduard3 years ago

3 0

Answer:

Step-by-step explanation:

3x-3+5x+24+44

3x-3+5×+68

3x+5x-3+68

8x+65

X=65÷8

X=8.125

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Please help! File attached to this

Juliette [100K]

Answer:

C I think is the correct answer

5 0

3 years ago

How do I solve x+y=-5 using y=mx+b

andrew-mc [135]

To put in into y=mx+b format, you have to subtract the x on both sides.

y=-x-5
This would be the answer.

5 0

3 years ago

Solve systems of linear equations.NEED ASAP<br> y=5x-8<br> y=-6x+3

Black_prince [1.1K]

Your first solution▶y - 5(x) = -8
Your second solution▶y + 6x = 3

Your graphic organizer ▶-5(x) + (y) = -8;
6(x) + (y) = 3

y-intercept in the 2nd solution▶(y)= -6(x) + 3

y-intercept in the 1st solution▶-6(x)+3 - 5(x) = -8 ; - 11(x) = -11
(we get the '11x' from the 6 + 5)

x-intercept in the 1st solution▶11(x) = 11
Does 11(1) =11
▶Answer is yes, so the x-intercept is 1
➡x-intercept: 1

y-intercept should be coming up soon!

(y) = -6(1)+3
⬆ ⬆
-6 + 3 = -3
So, the y-intercept is -3

y-intercept: -3

x-intercept: 1

~in other words~

x-intercept: 1

y-intercept: -3

5 0

3 years ago

Write in point-slope form an equation of the line through the pair of points. (3,12) and (5,9)

horrorfan [7]

Answer:

$\large\boxed{y=-\dfrac{3}{2}x+16\dfrac{1}{2}\to y=-1.5x+16.5}$

Step-by-step explanation:

The slope-intercept form of an equation of a line:

$y=mx+b$

<em>m</em><em> - slope</em>

<em>b</em><em> - y-intercept</em>

The formula of a slope:

$m=\dfrac{y_2-y_1}{x_2-x_1}$

We have the points (3, 12) and (5, 9).

Substitute:

$m=\dfrac{9-12}{5-3}=\dfrac{-3}{2}=-\dfrac{3}{2}$

Put the value of a slope and coordinates of the point (3, 12) to the equation of a line:

$12=-\dfrac{3}{2}(3)+b$

$12=-\dfrac{9}{2}+b$

$12=-4\dfrac{1}{2}+b$ <em>add $4\dfrac{1}{2}$ to both sides</em>

$16\dfrac{1}{2}=b\to b=16\dfrac{1}{2}$

Finally:

$y=-\dfrac{3}{2}x+16\dfrac{1}{2}$

4 0

3 years ago

Write an equation of the line that passes through 7,10 and is perpendicular to the line y=1/2-9

kow [346]

An equation of the line that passes through (7,10) and is perpendicular to the line y=1/2x-9 is $y=-2x+24$

Step-by-step explanation:

We need to write an equation of the line that passes through 7,10 and is perpendicular to the line y=1/2x-9

<u>Note:</u> Considering the line y=1/2x-9

For finding an equation of line we need

Slope (m)
y-intercept (b)

The general equation of slope intercept form used is:

$y=mx+b$

The equation of line given is: y=1/2x-9

The new line is perpendicular to the given line So, the slope of new line would be m = -1/m

So, Slope of given line m = 1/2

Slope of required line = -1/m = -2

So, m= -2

Now, for finding y-intercept (b) we need slope m = -2 and the point given (7,10)

Putting values of m, x=7 and y = 10 in the equation of slope intercept form

$y=mx+b\\10=-2(7)+b\\10=-14+b\\b=10+14\\b=24$

So, Equation of required line having slope m = -2 and y-intercept b = 24

$y=mx+b\\y=-2x+24$

An equation of the line that passes through (7,10) and is perpendicular to the line y=1/2x-9 is $y=-2x+24$

Keywords: Equation of line using Slope

Learn more about Equation of line using Slope at:

#learnwithBrainly

7 0

3 years ago