Answer:
x=6
Step-by-step explanation:
7x =42
7 7
x=6
Divide 7 on both sides
Answer:
18 sides
Step-by-step explanation:
Each exterior angle of a regular polygon = 20 deg. So the polygon has 360/20 = 18 sides
Answer:
16
Step-by-step explanation:
a+ 3(b + c)
a + 3b + 3c
but a + 3b = 7 and c = 3
7+3(3)
7 + 9
=16
Step-by-step explanation:
given
( x³ -64)/ x - 4
= (x³ - 4³) / x - 4
= (x - 4) ( x² + 4x + 16 ) / (x - 4)
( x- 4 ) will be cancelled out then
= x² + 4x + 16
