Answer:
y is decreasing by 10units per second
Step-by-step explanation:
Given xy = 15
If x = 3
y = 15/3
y = 5
dx/dt= 6
Differentiating xy = 15 implicitly with respect to t using product rule
x
xdy/dt + ydx/dt = 0
Substitute the given value into the expression and solve for dy/dt as shown:
3dy/dt + 5(6) = 0
3dy/dt + 30 = 0
3dy/dt = -30
Divide both sides by 3
(3dy/dt )/3 = -30/3
dy/dt = -10
This means that y is decreasing by 10units per second (it is decreasing because of the negative sign)
If there are x boys, there are 2x girls. boys+girls=27 gives x+2x=27. Solving, 3x=27 or x=9. Since there are 2x girls, there are 2*9=19 girls.
Answer: one, 40 is a real number
Step-by-step explanation:
Answer:
34 degrees
Step-by-step explanation:
Angle K is similar to Angle R, and Angle R is 34 degrees. So Angle K is also 34 degrees.
Hope it helps!
