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Arlecino [84]
3 years ago
12

What is the solution to this system of equation? x=2y-4 7x+5y= -66

Mathematics
2 answers:
mina [271]3 years ago
8 0

Answer:

Step-by-step explanation:

oh gosh

im sorry but idk how to solve that, mabye if i say you are smart you will be motivated?

Agata [3.3K]3 years ago
6 0

Answer:

x=-8 y=-2

Step-by-step explanation:

substitute x for 2y-4

7(2y-4)+5y=-66

factor

14y-28+5y=-66

add 28 on both sides

14y+5y=-38

19y=-38

divide by 19 on both sides

y=-(38/19)

y=-2

Plug -2 into the first equation for y

x=2(-2)-4

x=-4-4

x=-8

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Mrs.Giblin begins hiking at mile marker 25 on the Appalachian Trail and hikes 3 miles every hour. What is the slope?
Ilya [14]

Answer:

3 miles

Step-by-step explanation:

Slope is simply the change in position per unit rate. We could conclude that the steepness of the Applachian is the rate of change in position per unit time. Since the distance hiked on the Applachian is said to be 3 miles per hour, then we can conclude that the slope of the applachian is 3 miles

This is the change in miles / change in time.

Chang in miles = 3

Change in time = 1

Slope = 3/1

Slope = 3

7 0
3 years ago
What did I do wrong when finding out the sector area? I know the answer I got is wrong so can someone please help me
bonufazy [111]
I believe your mistake is that you are trying to use the sector area formula ti find arc length when there is already a formula for it.
The formula for it is
2r\pi( \frac{degree}{360} )
So first substitute the values in and then simplify!
2(10.5)\pi( \frac{118}{360} )
Now simplify!
21 × 118 is 2478 so it's
\frac{2478}{360} \pi
When divided ou and multiplied, this is 21.62cm!

4 0
3 years ago
The set of negative integers less than 0 but greater than -10?<br>help me please ​
Len [333]
S.S{-1 ,-2,-3,-4,-5,-6,-7,-8,-9}

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3 0
2 years ago
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A coordinate plane with a line passing through points (1, 2) and (4, 4)
Kobotan [32]

A straight line is represented by a linear equation given below.

The points are given as (1, 2) and (4, 4).

Start by calculating the slope (m)

m=\frac{y_2-y_1}{x_2-x_1}

So, we have

m=\frac{4-2}{4-1} \\m=\frac{2}{3}

<h3>What is the slope-intercept form of the line?</h3>

The equation in slope-intercept form is then calculated as:

y=m(x-x_1)+y_1

So, we have:

y=\frac{2}{3}(x-1)+2\\ \\y=\frac{2}{3}(x-4)+4\\

Expand

y=\frac{2}{3}(x-1)+2\\ y=\frac{2}{3} x-\frac{2}{3}+2

Take LCM

y=2/3x+4/3

Multiply through by 3

3y=2x+4

So, the possible equations are:

.3y=2x+4\\y=\frac{2}{3}x+\frac{4}{3} \\y=\frac{2}{3}(x-1)+2\\y=\frac{2}{3}(x-4)+{4}

To learn more about linear equations visit:

brainly.com/question/11897796

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8 0
2 years ago
Read 2 more answers
Solve.
Pie

Answer:

20

Step-by-step explanation:

He wil be 20 because if his brother is 10 and it says his brothers age is his age but just doubled then it would be 20 example: If bobs brother was 40 then bob would be 80

3 0
2 years ago
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