Answer: Substitution
Step-by-step explanation:
Use substitution because x=-3y+10 is already solved for variable x.
Answer:
i can't see clearly
Step-by-step explanation:
Answer:
dx/dt = 5√5/2
Step-by-step explanation:
Given:
dx/dt = 25 feet per second
According to Pythagoras theorem:
x² + 90² = y²
We know that x = 30 ft
So,
x² + 90² = y²
30² + 90² = y²
y = 30√10
So,
x² + 90² = y²
By taking differentiate:
2x dx/dt = 2y dy/dt
[x/y][dx/dt] = dy/dt
dx/dt = 5√5/2
Answer is A.
the two angles are share a side (side BC)
hope it helps
