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>
1. The coefficient of x is the constant of variation. It is 40.
2. -12 = -2*6 . . . . . you know this because you know your times tables
.. f(x) = -2x
In four hours, he drives: = 252
So, Unit rate = 252/4 = 63 mph
In seven hours, it would be = 63 * 7 = 441 miles
Hope this helps!
1/2 chance to get a dinosaurs sticker for the first bag. 1/6 chance to get a dinosaurs sticker for the second bag.
Answer:
0.875 as a decimal
875/1000 or 7/8 as a fraction
explanation:
7/8 = 0.875
875/1000 = 0.875
hope this helps :)