Answer:
roots: 2 ± (1/2)√42
-8
axis of symmetry: x = -b/(2a) is x = ---------------- = 2
2(-2)
vertex: (2, f(2) ) = (2, -2(2)^2 + 8(2) + 13 ), or (2, 21)
Step-by-step explanation:
First, let's determine the roots of this quadratic, using the quadratic formula. Here the coefficients are -2, 8, 13.
Thus, the discriminant b^2 - 4ac is 8^2 - 4(-2)(13), or 64 + 104, or 168. Because the discriminant is positive, we know that there are two different real roots.
They are:
-8 ± √168 -8 ± 2√42
x = --------------------- or x = --------------------- = 2 ± (1/2)√42
-4 -4
The entire expression represents the total cost of the pants and shirts that Chris bought.
25p + 18(p + 4) ....let me break this down for u...
p = number of pants bought
25p is telling us the pants cost $ 25 a piece
p + 4 is telling us the number of shirts bought...4 more shirts then pants
18(p + 4) is telling us that each shirt bought costs $ 18
Answer:
1 : 19 PM
Step-by-step explanation:
9 + 3 = 12
42 + 37 + 79
12:00 + 1 hour and 19 minutes
1 : 19 pm
Answer:
$7.25 or D
Step-by-step explanation:
First take the 18$ and the $10.75 and subtract 10.75 from 18 and get $7.25
Tax: $2
Total: $27
Step-by-step explanation:
Given,
Price of boots = $25
Tax = 8%
Amount of tax = 8% of price of boots
Total = Price of boots + Tax amount
Tax: $2
Total: $27
Keywords: sales tax, addition
Learn more about addition at:
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