Answer:
3
Step-by-step explanation:
first term a= 2
last term tn= 32
common ratio r= -2
number of terms
= tn=ar^n-1
32 = 2*(-2)^n-1
divide both sides by 2
32/2 = 2*(-2)^n-1/2
16 = (-2)^n-1
Then...use 16 in the power of 2
(-2)^4 = (-2)^n-1
The bases (-2), cancels out
so we have: 4 = n-1
collect like terms
4-1 = n
3 = n
n= 3
Answer:
40 degrees
Step-by-step explanation:
Basically the exterior angle plus x =180, so 4x-20+x=180. x=40.
Answer:
Because it will take a lot of time to do
Reason a) Alternate interior angles of parallel lines are congruent.
Statement b) Line RQ is congruent to line RQ.
Statement c) Angle PRQ is congruent to angle SQR.
Reason d) ASA Postulate
