We know that
the <span>formula of the arithmetic series is
</span>Sn=<span>n[2(a1) + (n - 1)d]/2
where
Sn=80
n=20
d=2
a1=?
then
80=20*[2*a1+19*2]/2----------------> </span>160=[40*a1+760]
160=[40*a1+760]----------> a1=(160-760)/40------------> a1=-15
<span>
the answer is
a1=-15
</span>
Answer:
Step-by-step explanation:
For Rectangle:
base (b) = 20ft
height (h) = 38ft
For Parallelogram:
Base (B) = 60ft
Height (H) = 38ft
The Total Area where rose will be planted
= area of parallelogram - area of rectangle
Thus, The Total Area where rose will be planted is 1520ft square
Answer:
"line" a straight line graph is always linear once the line isn't straight, it'll no longer be called a line and will never be linear anymore
Answer:
The area is 60
Step-by-step explanation:
You had to multiply 5×4×3