Answer:
12
Step-by-step explanation:
X/15 = 10/20
20x = 150
x = 150/20
x = 7.5
Answer:
a) 160°
b) 18 sides
Step-by-step explanation:
Interior angle = 180 - exterior
= 180 - 20 = 160°
Each angle of a regular polygon:
[(n-2)×180]/n = 160
180n - 360 = 160n
20n = 360
n = 18
Alternate approach for no. of sides:
360/n = each exterior angle
360/n = 20
n = 360/20 = 18
Answer:
41
Step-by-step explanation:
The number 1 is in the ones place. 1x4=4, so 4 is in the tens place. If you reverse 41, you get 14. 41+14=55.
3x-10+2x=115
5x-10=115
5x=125
x=25
m<b=3(25)-10=65
m<C=2×25=50
