Answer:C
Step-by-step explanation:
First of all the selling price after discount is
$76 - ($76×25%)
= $76 - $19
= $57
Then the price is further reduced by 10%. Thus the final price is
$57 - ($57×10%)
= $57 - $5.7
= $51.3
So the answer is (B)
30 gallons, first times 4 by 120 wihc is the 2 hours then divide by 16
Answer:
a) It's a quadratic
b) f(x) = A(x-3)(x-7)
c) she is right
Step-by-step explanation:
(0-12)/(3-1) = -6
(-4-0)/(5-3) = -2
Since the slope is not constant, it can't be a linear.
Therefore a quadratic
Since the zeroes are 3 and 7,
Factors are (x - 3) and (x - 7)
f(x) = A(x - 3)(x - 7)
Use any one point besides the x-intercepts to find A
12 = A(1-3)(1-7)
12 = 12A
A = 1
f(x) = (x - 7)(x - 3)
f(x) = x² - 7x - 3x + 21
f(x) = x² - 10x + 21
She is right
