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>
In the survey, 9 said they prefer the coffee shop next door out of 45 people total surveyed. This forms the fraction 9/45 = 1/5 which converts to 0.2 when you use a calculator or long division. In other words, 1/5 = 0.2
You'll then multiply the result of 0.2 by the total number of employees (250) to get...
0.2*250 = 50
So based on the results of the survey, we expect about 50 employees to say they prefer the coffee shop next door.
Answer: Choice B) 50
Answer:
7, 22, 39 hope this helps :)
Step-by-step explanation:
It’s adding 7, then 9, then 11, and so on.
Answer:

Step-by-step explanation:
We can find this by multiplying the two-thirds of Tanisha's garden by one-fourth, which is
.
Answer: 8.4 inches.
Step-by-step explanation:
We know that the circumference of a circle can be calculated with this formula:

Where "r" is the radius of the circle.
We know that the circular cake (whose radius is 8 inches) is cut from the center into 6 equal pieces. Then, you need to divide the circumference of this circular cake by 6 to find the width of the outer edge of each piece of cake.
Therefore, this is (to the nearest tenth of an inch):
