In the addition/subtraction method, the two equations in the system are
added or subtracted to create a new equation with only one variable. In
order for the new equation to have only one variable, the other variable
must cancel out. In other words, we must first perform operations on
each equation until one term has an equal and opposite coefficient as
the corresponding term in the other equation.
You need to get the r by itself on one side, with the constants (numbers without the r) on the other side.
Step-by-step explanation:

its 1/4 of the circle
circle circumference:

we need 1/4 of it, so its

Answer:
The distance traveled between 10 minutes and 15 minutes is increasing.
Step-by-step explanation:
Jacob is going on a road trip across the country. He covers 10 miles in 15 minutes.
Therefore, between the 10 minutes and 15 minutes, Jacob was in motion and if he covers 10 miles in 15 minutes with a constant speed, then Jacob will cover
miles in that period.
So, the distance traveled between 10 minutes and 15 minutes is increasing.
(Answer)
Volume of a cone = (π.R²)(h/3)
Diameter = 14cm then R=7 cm
Height = h= 2cm
Hence V=*π.7²)(2/3) ==> 98π/3 or 102.625 cm³