2 years ago

Use substitution to solve the following system of equations. -2x + 4y = -18 AND x = y + 3

Mathematics

2 answers:

Annette [7]2 years ago

5 0

Answer:

x = -3 y = -6

Step-by-step explanation:

x = y + 3

x - 3 = y

-2x + 4(x - 3) = -18

-2x + 4x - 12 = -18

2x = -6

x = -3

x = y + 3

-3 = y + 3

-6 = y

loris [4]2 years ago

4 0

Answer:

x = -3 ; y = -6

Step-by-step explanation:

x = y + 3

-2x + 4y = -18

-2(y+3) + 4y = -18

-2y -6 + 4y = -18

2y = -12

y = -6

x = -6+3

x = -3

You might be interested in

PLEASE HELP 11 POINTS FOR THE CORRECT ANSWER

Nady [450]

Answer:

$\sqrt{43}$

Step-by-step explanation:

3 0

2 years ago

Write an equation in slope intercept form with the given information. Goes through points (0,3) and (1,6)

Setler79 [48]

Answer:

below..

Step-by-step explanation:

slope = (y - y1)/(x-x1) = (6 - 3 )/(1-0) = 3 is the slope/ gradient

equation of the line = y -3 = 3(x - 0) => y = 3x + 3

5 0

2 years ago

A school psychologist is interested in determining if children with attention deficit disorder (ADD) learn better if English lit

boyakko [2]

Answer:

The answer is "Option a"

Step-by-step explanation:

The Rejecting or the null hypothesis is refused by the refuting were used when the significance for our data analysis is less than the cut-off points, for example, either 0.05 or 0.01, therefore reject the null accept the alternative hypothesis, that's why in this question, the first choice is correct.

7 0

3 years ago

By completing the square<br>1. x2 + 5x + 6= 0<br>cing

Hoochie [10]

Answer:

x=-3 and x=-2

Step-by-step explanation:

I wrote the math down

7 0

3 years ago

The solids are similar. Find the surface area S of the red solid.

Brut [27]

The refresh is a little hard was

5 0

3 years ago