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.

8 0

3 years ago

A cyclist averages 11 miles per hour. How many miles does the cyclist ride in 4.5 hours?

Basile [38]

49.5 mph
I hope it’s helped.

7 0

3 years ago

What is the x and y intercept of y + 12 = 5(x-4)

aalyn [17]

Answer:

x-intercept: $(\frac{32}{5},0)$

y-intercept: (0,-32)

Step-by-step explanation:

To find the x-intercept, substitute in 0 for y and solve for x . To find the y-intercept, substitute in 0 for x and solve for y .

5 0

3 years ago

5 + x/4 = 1 solve step by step

VMariaS [17]

−

Explanation:

Isolate the term in

on the left side:

−

←

multiply both sides by 4

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6 0

4 years ago

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