I believe it is the first once because if a means the amount of apples and $1.75 is the amount paid for 1 apple, this answer would be correct.
Answer:
9x+7y+13
Step-by-step explanation:
5x+4x=9x
3y+3y+y=7y
5+8=13
Answer:
u(2t + v)
Step-by-step explanation:
Doubling t = 2 * t = 2t
Add v = 2t + v
Multiplying this by u will be u multiplied everything else, so u(2t + v).
Answer:
distance between two points is

Step-by-step explanation:
the distance d(P1, P2) between the points P1 and P2
Use distance formula

P1 = (-5,3) is (x1,y1) P2 = (2,4) is (x2,y2)
Plug in the values in the distance formula

Answer:
All of them are parallel
Step-by-step explanation:
This is due to the all of the 90 degree angle which would make the rest of the line a would be another 90 degree angle Which are found on every line. This would make all of the lines parallel because it is a total of 180 degrees.