Answer two questions about Equations A
AA and
B
BB:
A
.
3
(
x
+
2
)
=
18
B
.
x
+
2
=
6

A.
B.




3(x+2)
x+2


=18
=6


1) How can we get Equation
B
BB from Equation
A
AA?
Choose 1
Choose 1

(Choice A)
A
Add/subtract the same quantity to/from both sides

(Choice B)
B
Add/subtract a quantity to/from only one side

(Choice C)
C
Multiply/divide both sides by the same non-zero constant

(Choice D)
D
Multiply/divide only one side by a non-zero constant

second option

step-by-step explanation:

the measures of a triangle equal 180. use that to find x.

2x+3x+4x=180

9x=180

9x/9=180/9

x=20

now you know x, you know angle a is 40°, angle b is 60°, angle c is 80°.

because angle a is 40°, the first option doesn't work.

because angle b is 60°, the second option does work.

when you add angle a and b, you get 100°. complementary means it equals 90°, so the third option doesn't work.

when you add angle a and c, you get 120°, which is not 100.