The formula for the sum of n terms in an arithmetic progression is:
S = n/2 * (2a + (n-1)d)
Here, the common difference, d, is 8 and the first term, a, is 1. Substituting these into the formula, we get:
S = n/2 * (2*1 + 8(n - 1))
S = n + 4n² - 4n
S = 4n² - 3n
The answer is A.
Answer:
10 + m ≥ 30
You must spend AT MOST $20 or more
Step-by-step explanation:
Basically you have already spent 10 dollars and you have to pay MORE than or equal to 30. You cannot pay less than because you want the free songs. So the sign has to be ≥ or the inequality will not be true.
10 + m ≥ 30
10 - 10 + m ≥ 30 - 10 ( subtract 10 from each side to isolate m)
m ≥ 20 ( we are left with this )
The answer is :
m ≥ 20
You must spend at most 20 dollars more to get the 3 free cd's. Your welcome :D
Answer:
The 400 coupon is 80 cents better
Step-by-step explanation:
First find the sale price with the coupon
744 - 400 = 344
Now find the sale price with the discount
100-55 = 45
We will pay 45% of the original price
744*45%
744*.45
344.80
Answer:
x=0, y=1
Step-by-step explanation:
Answer:
<u>First find the slope using the formula </u>
m = (Y2 - y1)/(x2 - x1)
(x1, y1) = (0,6)
(x2, y2) = (2,10)
m = (10-6)/(2-0)
m = 4/2
m = 2
<u>Now we need the y-intercept or b</u>
y = mx + b
y = 2x + b
<u>Use one of the coordinates for x and y. It doesn't matter which you choose</u>
6 = 2(0) + b
6 = 0 + b
6 = b
<u>Now let's put it together for the equation :</u>
y = 2x + 6
