Answer:
Subtract 21 from the left side and add 21 to the right side of the equation.
The answer is b = 198.
Check the solution by substituting 198 for b.
Step-by-step explanation:
d
4^2 or 16
4^5 / 4^ 3
*subtract the exponents*
5 - 3 = 2
4^2 = 16
(2x+4)° + 42° = 180°
x = 67°
3 pieces such that each piece is 2 cm longer then the next...
x , x + 2, x + 4
x + x + 2 + x + 4 = 30
3x + 6 = 30
3x = 30 - 6
3x = 24
x = 24/3
x = 8
x + 2 = 8 + 2 = 10
x + 4 = 8 + 4 = 12
check...
8 + 10 + 12 = 30
18 + 12 = 30
30 = 30 (correct)...it checks out
the ribbon lengths are : 8 cm, 10 cm, and 12 cm
b . 4/5
60 :15 minute : 4
3 /15 x 4 = 12/15 = 4/5
