Choose all that give a correct first step to solve the system of equations by the elimination method. equation a: 3x + 4y = 52 equation b: 5x + y = 30 multiply equation b by ? 4 equation a: ? 2x + 3y = ? 1 equation b: x + 5y = 25 multiply equation b by 2 equation a: 2x + y = 2 equation b: ? 3x + 3y = 10 multiply equation a by 5 equation a: 4x + y = 3 equation b: 6x + 3y = 9 multiply equation a by ? 3

Multiply equation B by 4.

Step-by-step explanation:

Solve equation A 3x + 4y = 52 and equation B 5x + y = 30 by multiplying equation B by 4.

This becomes 3x + 4y = 52 and 20x + 4y = 120.

Subtract the equations.

3x + 4y = 52

20x + 4y = 120

-17x = -68

Divide by -17.

x = 4

Substitute x = 4 and solve for y.

3(4) + 4y = 52

12 + 4y = 52

4y = 40

y = 10

5x+40

5(x + 8)

7x - 49

7(x - 7)

18x + 9

9(2x + 1)

15x - 10

5(3x - 2)

step-by-step explanation:

for number one all you have to do is factor 5 out of 5x + 40

for number 2 factor 7 out of 7x - 49

for number three factor 9 out of 18x + 9

for number four factor 5 out of 15x - 10

sas (side angle side)

aa (angle angle)

sss(side side side)

sas find two sides with an angle in between

aa is finding two angles and the third will add up to 180

sss find all sides

step-by-step explanation: