Answer:
β = 140 - α
we know that the "missing" angle is 40° since 40 + 140 = 180
we also know that the total sum of angles in a triangle is 180
so β = 180 - 40 - α
or β = 140 - α
Step-by-step explanation:
Answer: 8 balloons per box
8x18 + 8x12 = 144+96 = 240
9514 1404 393
Answer:
C. 3x² +24
Step-by-step explanation:
Use the given function definitions and simplify.

Dodecahedron is a 3D shape, usually when it ends with hedron it is 3D.
Answer:
y = 5x - 3
Step-by-step explanation:
equation of a straight line is <em>y = mx + b </em>where m=slope and b=y-intercept
in this case m=5 and b= -3
y = mx + b
y = 5x - 3