When you have parallel lines cut by a transversal, alternate interior angles are congruent.
The 80 degree angle and the (20 + x) angles will be congruent.
Therefore, x = 60 degrees.
The given expression can be simplified in many ways by grouping like terms. The simplest form is obtained by factoring out a²b which gives us the following expression.
a²b(7 + 10b +14b²)
-6 is the answer it right i just know it
The correct answer is 14.2 lb which is choice D.
Let:
F = minimum force required to prevent ball from rolling down the ramp
The formula will be:
F = w * sin theta
F = w * sin (39 degrees)
F = 22.6 * sin (39)
= 14.2 lb (this is rounded to the nearest tenth)