I think the answer is A 28,4 I hopes this helps
9514 1404 393
Answer:
an = 17 +5(n -1)
Step-by-step explanation:
The first term can be found by working backward from the third term:
third term = 27
second term = 22 . . . . subtract 5 from 3rd term
first term = 17 . . . . . . . . subtract 5 from 2nd term
The generic term is given by the formula ...
an = a1 + d(n -1) . . . . . a1 = first term; d = common difference
Here, we have a first term of 17 and a common difference of 5. So, the sequence terms are described by ...
an = 17 +5(n -1)
Its c (9) because the opposite of -9 is 9
Answer:
6.53 s
Step-by-step explanation:
The height of the cannon ball is represented by a quadratic function as:
h(t) = -4.9t² + 30.5t +9.8.
At 0 s (i.e. t = 0), h(0) = -4.9(0²) + 30.5(0) + 9.8 = 9.8
That means that the cannon ball is initially at a height of 9.8 m above the ground. To calculate the time it takes the ball to touch the ground, we use:
h(t) = -4.9t² + 30.5t +9.8
It touches the ground when h(t) = 0. Hence:
0 = -4.9t² + 30.5t + 9.8
Solving the above quadratic equation gives:
t = 6.53 s and t = -0.31 s
Since the time cannot be negative, hence t = 6.53 s. Therefore it takes the ball 6.53 s to hit the ground.
Answer: a = 1
You want the letters on the left and all numbers on the right. First you must get rid of the three so to get rid of it you must take it away (a/5=8-3). = a/5=5. Then you want to have the a by itself and so divide by 5. (a=1)