Answer:
First term (a) =8
Common difference (d)= t2-t1
=12-8
=4
Now, sum of first 31th term (tn31) =n/2{2a+(n-1)d}
= 31/2{2×8+(31-1)4}
=31/2{16+(30×4)
=31/2(16+120)
=31/2×126
=31×63
Step-by-step explanation:
Similarly use 19 as (n) for the 19th term
Answer:
Step-by-step explanation:
The area of a trapezoid is the average of the parallel bases times the height.
A=h(a+b)/2 and since we have two identical trapezoids the total are will be
A=h(a+b) in this case
A=15(32+25)=855mm^2
Answer:
1/4
Step-by-step explanation:
3/12=
3÷3/12÷3=
1/4
Answer:
8
Step-by-step explanation:
if the 5 aka water is equal to 20, then one unit is equal to 4, and multiply 4 by 2 to get 8.
Pls brainliest
Answer:
0 is your y intercept and 5 is the x intercept