We know that
the formula of the <span>the sum of the arithmetic sequence is
Sum=n*(a1+an)/2
n=36
a1=3
a36=?
find a36
an=a1+(n-1)*d
for n=2 a2=9
9=3+(2-1)*d----> 9=3+d----> d=6
so
for n=36
a36=a1+(36-1)*6----> a36=3+35*6----> a36=213
</span>Sum=n*(a1+an)/2-----> 36*[3+213]/2----> 3888
the answer is
3888
IM PRRETTY SURE ITS D BEB
Answer:
v=58.33in^3
Step-by-step explanation:
v=a^2h/3=5^2×7/3=58.33333 in^3
Answer:
x = 13
Step-by-step explanation:
Using the sine ratio with the 45° angle on lower left and the exact value
sin45° = 
ain45° = 
= 
= ( cross- multiply )
x = 13
Answer:
PR is an altitude
QT is a median.
Step-by-step explanation:
The altitude is the perpendicular height and the median is a line from 1 vertex to the middle of the opposite side.
