Answer:
Step-by-step explanation:
Sum Of Arithmetic Sequence
Given an arithmetic sequence
The sum of the n first terms is
Or equivalently
![\displaystyle S_n=\frac{[2a_1+(n-1)r]n}{2}](https://tex.z-dn.net/?f=%5Cdisplaystyle%20S_n%3D%5Cfrac%7B%5B2a_1%2B%28n-1%29r%5Dn%7D%7B2%7D)
The given sequence is
5, 8, 11 ...
We can see the common difference between terms is r=3
We are asked to find the sum of the terms 2 to 5, it means that
![\displaystyle S_4=\frac{[2(8)+(4-1)3]4}{2}](https://tex.z-dn.net/?f=%5Cdisplaystyle%20S_4%3D%5Cfrac%7B%5B2%288%29%2B%284-1%293%5D4%7D%7B2%7D)
Answer: 10.99 + 1.25x
Step-by-step explanation:
The cost of a large pizza is $10.99 and each additional topping costs $1.25. The expression that can be used to calculate the cost of a pizza when x toppings are added will be:
Cost of pizza + (number of additional toppings × 1.25)
Since x toppings are included, this will be:
= 10.99 + (1.25 × x)
= 10.99 + 1.25x
1 gal = 4 quarts
so
4 gal = 16 quarts
Answer:
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Here, is the answer of comparison
Given: 2<span>√(x - 5) = 2
Taking the square of both sides:
[</span>2√(x - 5) = 2]^2
4(x - 5) = 4
x - 5 = 1
x = 6
Among the choices, the correct answer is A. <span>x = 6, solution is not extraneous .</span>
