7. the formula for octagon is a=2(1+radical2)s^2
s=4
a=about 77.25
8.
Answer:
11/18
Step-by-step explanation:
divide the numerator and denomonater by the GCD, whic is 6.
then you would get the reduced fraction of 11/18
Answer:
(k - 4) ÷ 9
(k - 4) / 9
Step-by-step explanation:
k decreased by 4 = k - 4
quotient of k decreased by 4 and 9
= (k - 4) ÷ 9 (using division sign)
Or
= (k - 4) / 9 (as a fraction)
For the first two,the probability is 0.4, and for # 3,the probability is .2
