The answer that you are looking for is C.
Answer:
19+12 = 31 pieces
Step-by-step explanation:
<span>The equation of the directrix of the conic section </span>y^2 + 16y + 4x + 4 = 0 is x = 16.
It means that the two sides are congruent.
hope this helps !
So Annette's speed was 45 mph.
Let's make 2 equations to represent Annette's speed.
T*S = 120
Where
T = the time Annette has been driving.
S = her mean speed.
120 = number of miles she's traveled.
and another equation that's
T*(S+3) = 128
So we now have 2 equations with 2 unknowns. They are
T*S = 120
T*(S+3) = 128
Let's divide the top equation by S on both sides and the bottom equation by (S+3) on both sides giving
T = 120/S
T = 128/(S+3)
So we now know that 120/S is equal to 128/(S+3). So let's make that equation and solve for S
120/S = 128/(S+3)
Multiply both sides by S(S+3)
120(S+3) = 128S
Distribute the 120 on the left
120S + 360 = 128S
Subtract 120S from both sides
360 = 8S
And divide both sides by 8
45 = S
So Annette's speed was 45 mph.
