Answer:
-22
Step-by-step explanation:
f(x) = -2x^2 - 4 for x = 3
f(3) = -2(3)^2 - 4
f(3) = -2(9) - 4
f(3) = -18 - 4
f(3) = -22
Answer: -22
Answer: 
Step-by-step explanation:
From the figure, it is downward parabola of the form 
The parabola has its vertex at 
Distance between parabola vertex and its directrix is 1 unit.
So, the value of a is 1
Hence, the equation of parabola is
Answer:
Helen: 60mph and Anne: 50mph
Step-by-step explanation:
3.2r+2.8(r-10)=332 is the equation that we use, given the information we have.
We distribute and combine like terms and add 28 to both sides and divide by 6.
3.2r+2.8(r-10)=332
3.2r+2.8r-28=332
6r=360
6r/6=360/6
r=60 So, Helen's speed is 60mph.
Next, we'll solve Anne's speed.
r-10=50
60-10=50 So, Anne's speed is 50mph.
Answer:
$15.88
Step-by-step explanation:
19.99X0.25 = 4.9975
4.9975~5.00
19.99- 5.00
14.99X0.06~ 0.89
14.99+0.89
15.88
