C = 84 degrees
A = 2B
C = A + 20
A + B + C = 180
A = 2B
A/2 = B
A + (A/2) + (A+20) = 180
multiply each side by 2
2A + A + 2A + 40 = 360
combine like terms
5A + 40 = 360
subtract 40 from both sides
5A = 320
divide both sides by 5
A = 64
C = A + 20
C = 64 + 20
C = 84
Answer:
yes
Step-by-step explanation:
line ab^2=(3-0)^2+(5-2)^2=9+9=18
line bc^2=((0-(-2))^2+(2-10)^2=4+64=68
line ca^2=((-2)-3)^2+(10-5)^2=25+25=50
bc>CA>ab
if it's a right triangle, then bc^2=ab^2+ca^2
68=50+18
so, it's a right triangle
Answer:
x = 3
Step-by-step explanation:
-5(3x -7) + 11 = 1
Distribute 5:
-15x + 35 + 11 = 1
Combine like terms:
-15x + 46 = 1
Subtract by 46 =
-15x = 1 - 46
-15x = -45
Divide by -15:
x = -45 / -15
x = 3
