Unless if you have the solution for a you can find b
Answer:
the first term is a1
the distance between the numbers is d
we have:
a5 = a1 + 4d = 23
a12 = a1 + 11d = 72
so we have the equation:
a1 + 4d = 23
a1 + 11d = 72
=> a1 = -5
d = 7
=> an = -5 + 7(n - 1) = 7n - 12
with an = 7n - 12
=> a2 = 2
a3 = 9
so the first three terms is -5; 2; 9
Ok you would have to multiply the 11 by 3 then you should get your answer of 33m.
Answer:
D
Step-by-step explanation:
Measure of 1 and Measure of 2 will add up to 180 degrees
