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DENIUS [597]
2 years ago
5

Solve each system of equations by substitution -4x+y=-5 and 2x+y=7

Mathematics
2 answers:
Nadya [2.5K]2 years ago
6 0

Answer:

(2,3)

Step-by-step explanation:

cestrela7 [59]2 years ago
6 0

Answer:

x = 2 and y = 3

Step-by-step explanation:

-4x + y = -5  -------------------(I)

         y = 4x  - 5 ------------(II)

2x + y = 7 -------------------(III)

Substitute y = 4x - 5 in equation (III)

2x + 4x - 5 = 7

   6x - 5 = 7

Add 5 to both sides

6x = 7 + 5

6x = 12

Divide both sides by 6

x = 12/6

x = 2

Plugin x =  2 in (II)

y = 4*2 - 5

y = 8 -5

y = 3

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Latoya just bought a refrigerator for $931. She paid $139.80 in a down payment and will pay the rest in 4 equal installments. Ho
NARA [144]

Answer:

$197.80

Step-by-step explanation:

$931.00 - $139.80 = $791.20

$791.20 / 4 equal installments = $197.80

7 0
3 years ago
Need help please right answers
cestrela7 [59]

Answer:

B

Step-by-step explanation:

y-intercept is where x is zero, so we must look at where the y-iterceot is crossed

3 0
3 years ago
Help me please...!!!
Bogdan [553]
Answer is B.
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8 0
3 years ago
What is the slope of the line parallel to the line whose equation is y+4x=7
ryzh [129]

Y+4x =7

Or y = -4x + 7

On comparing with point slope form

y = mx+c

We get m = -4 = slope of given line

As the required line is parallel to given line its slope is equal to -4

4 0
3 years ago
State the slope and the y-intercept for the graph of each equation y= -3/7x–1/7
MaRussiya [10]

Answer: Y-intercept is (0,-1/7) and the slope is -3/7

Step-by-step explanation:

State the slope and the y-intercept for the graph of each

equation y= -3/7x–1/7

To find the y-intercept,

you plug in 0 in for x for y= -3/7x–1/7

y=-3/7(0)-1/7

y=0-1/7

y=-1/7

The y-intercept is (0,-1/7)

To find the slope, you first check that the equation is in the form of y=mx+b

y= -3/7x–1/7 is in the from of y=mx +b.

The m is the slope

hence, in y= -3/7x–1/7 the slope is -3/7

3 0
3 years ago
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