Answer:
a₁ = 37
Step-by-step explanation:
In an arithmetic progression the common difference d is
d = a₂ - a₁ = a₃ - a₂ , that is
2x - 18 - (x + 1) = 2x - 1 - (2x - 18) ← distribute and simplify both sides
2x - 18 - x - 1 = 2x - 1 - 2x + 18
x - 19 = 17 ( add 19 to both sides )
x = 36
Thus
a₁ = x + 1 = 36 + 1 = 37
Answer:
Explained below.
Step-by-step explanation:
(A)
Use two-point form to determine the equation for the total monthly cost of the NextFell plan.
![(y-y_{1})=\frac{y_{2}-y_{1}}{x_{2}-x_{1}}\cdot (x -x_{1})\\\\(y-247)=\frac{247-114}{640-260}\cdot (x-640)\\\\(y-247)=0.35x-224\\\\y=0.35x+23](https://tex.z-dn.net/?f=%28y-y_%7B1%7D%29%3D%5Cfrac%7By_%7B2%7D-y_%7B1%7D%7D%7Bx_%7B2%7D-x_%7B1%7D%7D%5Ccdot%20%28x%20-x_%7B1%7D%29%5C%5C%5C%5C%28y-247%29%3D%5Cfrac%7B247-114%7D%7B640-260%7D%5Ccdot%20%28x-640%29%5C%5C%5C%5C%28y-247%29%3D0.35x-224%5C%5C%5C%5Cy%3D0.35x%2B23)
(B)
Compute the total monthly cost if 949 minutes are used as follows:
![y=0.35x+23\\\\=(0.35\times 949)+23\\\\=355.15](https://tex.z-dn.net/?f=y%3D0.35x%2B23%5C%5C%5C%5C%3D%280.35%5Ctimes%20949%29%2B23%5C%5C%5C%5C%3D355.15)
Thus. the total monthly cost if 949 minutes are used is $355.15.
I hope this helps you
?=63.70/100
?=441/10
?=44,1
Answer:
The correct option is C.
Step-by-step explanation:
A baseball player hit the ball and the height of the baseball is modeled by the equation
![h=-16t^2+65t](https://tex.z-dn.net/?f=h%3D-16t%5E2%2B65t)
Where, h is height of the ball and t is time.
The height of flying bird is modeled by the equation
![h=8t+20](https://tex.z-dn.net/?f=h%3D8t%2B20)
Where, h is height of the bird and t is time.
Both functions will intersect at that point where the values of both functions are same. It is possible when the height of bird and ball are same.
Therefore the intersection points of the equations represent the time when the height of the ball and the bird are the same. Option C is correct.
[Content Deleted]Sorry! Brainly.com deleted this person's answer for cyber reasons!