Answer:
Angle 1, 2, 4 = 45 degrees
Step-by-step explanation:
2x+15 = x+30
-15 both sides
2x = x+15
-x both sides
x = 15
Plug x = 15 into x+30 or 2x+15
15+30 = 45
2(15)+15 = 45
Answer:
x = variable (a symbol, usually a letter, representing possible inputs)
4 = constant (numbers that stand alone and have a fixed value)
3 = coefficient (number multiplied by variable)
Add them to eliminate x terms
x+3y=-7
<u>-x-7y=19 +</u>
0x-4y=12
-4y=12
divide by -4
y=-3
sub back
x+3y=-7
x+3(-3)=-7
x-9=-7
x=2
(x,y)
(2,-3)