Answer:
y= -4x^2 + 15x - 14
Step-by-step explanation:
A parabola is always in the form y = ax^2 + bx + c.
Substitute each point to produce different equations:
-14 = 0a + 0b + c = c
so c = -14
-3 = a1^2 + b1 + c = a + b - 14
so a + b = 11
0 = a2^2 + b2 + c = 4a + 2b -14 = 0
so 4a + 2b = 14
if we double a + b = 11 we get 2a + 2b = 22
Subtract this from 4a + 2b = 14 and we get 2a = -8 so a= -4 and b = 11 - a = 15
We don't need to use the (3,5) points as we have all the information we need.
Sam Paid A Sales-Tax Rate Of 6.5%.
This Is Because 8+5+15=28 + 6.5%= 29.82
Answer:
C
Step-by-step explanation:
42%= 
= 0.42
The answer to question 3 is D. 15(4a+3). And the answer to question 4 is A. 90. Have a great day
Constant rate means its the same rate and didn't change over time
