2x-2y
I couldn’t tell if the first figure was a one or a L or i so I solved it as a 1
Answer:

Step-by-step explanation:
A road is perpendicular to a highway leading to a farmhouse d miles away.
An automobile passes through the point of intersection with a constant speed
= r mph
Let x be the distance of automobile from the point of intersection and distance between the automobile and farmhouse is 'h' miles.
Then by Pythagoras theorem,
h² = d² + x²
By taking derivative on both the sides of the equation,




When automobile is 30 miles past the intersection,
For x = 30

Since 
Therefore,


Answer:3/4 miles per hour
Step-by-step explanation:
Simplify the fraction 20/15 to get 3/4 per hour or 0.75 miles per hour
Answer: It would be C
Step-by-step explanation:
because on Sat. there were 80 discs and on Mon. there were 55 discs, so 55-80=25 and C is your answer
Answer:
3.50 cups
Step-by-step explanation:
6-2.25=4.75
4.75-1.25=3.50