C (third graph, the parabola); To find if it is a function or not draw a vertical line on the graph. If the vertical line could never intercept the figure more than once anywhere on the graph then it is a function.
To find the perimeter I will add all of the numbers together so I get 3y+1
Given from the question
Vertex
(h,k) = <span>(500, 15900)
One of the points on the graph
(x,y) = (0,8400)
FIRST PART: Find the quadratic function
We can find the quadratic function by this formula
y = a (x - h)</span>² + k
Input the numbers to the formula, to find the value of a
y = a (x - h)² + k
8400 = a(0 - 500)² + 15900
8400 = a (500)² + 15900
8400 = 250000a + 15900
-250000a = 15900 - 8400
-250000a = 7500
a = 7500/-250000
a = 0.03
Submit a to the formula
y = a (x - h)² + k
y = 0.03 (x - 500)² + 15900
<em>(This is the quadratic function)
</em>SECOND PART: Find the linear function
<em />the total cost = cost each helmet × the number of helmet
y = 26x
SO, THE ANSWER IS OPTION B
Answer:
Step-by-step explanation:
The question isn't clear...
She can spend 6minutes with each friend.
Explanation step by step:
Maria has 30 min break, she walks 3 min to another floor- we have deduct that 3 min from 30 mi
30-3=27
Than she walks 3 min back to her floor
27-3=24
She has 24 minutes left which she equally divided between 4 friends
24:4=6
6 is the answer