Answer:
x = 10
Step-by-step explanation:
Adjacent angles add to 180 degrees, so set the angles equal to 180
(7x + 12) + (9x + 8) = 180
- 12 - 12
7x + (9x + 8) = 168
- 8 - 8
7x + 9x = 160
16x = 160
/16 /16
x = 10
<span>Here, we first calculate the value of 't' and then go on calculating the probability that the t-value is more than calculated t-value, given the degree of freedom (d.f. = n-1).
t.calc = (77-76)/(5/sqrt(100)) = 1/(1/2) = 2
P(x > 77) = P(t > 2, d.f. =99) = 0.0241= 2.41%</span>
Answer:
9 /15 and 18/30
Step-by-step explanation:
9/15 is literally just 18/30 simplified
