so I don't know but just use the internet
Carry out the mult.: f(x) = -[x^2 - 21x + 9x - 189]
Combine like terms: f(x) = -[x^2 - 12x - 189]
Eliminate the brackets [ ]: f(x) = -x^2 + 12x + 189
Identify coefficients a, b and c: a= -1, b=12, c=189
The equation of the axis of symmetry is x = -b/(2a), which here equals
x = -(12)/[2(-1)], or x = 6
This is also the x-coordinate of the vertex. Plug x=6 into the original equation to calculate the y-coordinate.
B and C I believe .............
Since the number before the number in the tenth place (7) is greater than 5 (8), you will be rounding up. So your answer is 9.80
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Hello!
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❖ Jeff will earn $267.20 in a 32 hour week.
Divide to find how much he gets paid per hour:
$334 ÷ 40 = $8.35
Multiply the cost per hour by 32 hrs to get the total amount he'll get paid:
$8.35 × 32 = $267.20
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