When you solve systems with two variables and therefore two equations, the ... of any variable is 1, which means you can easily solve for it in terms of the other ... In the substitution method, you use one equation to solve for one variable and ... Look for a variable with a coefficient of 1 … that's how you'll know where to begin.

Step-by-step explanation:

4 0

3 years ago

Find the area of the regular 20-gon with radius 77 mm.

butalik [34]

The area of a polygon equals
area = circumradius² * number of sides * sin (360 / # of sides) / 2
area = 77² * 20 * sin (360 / 20) / 2
area = 77² * 20 * sin (18) / 2
area = 118,580 * 0.30902 / 2
area = 36,643.59 / 2
area = 18,321.8 square millimeters

3 0

3 years ago

The winning average speed for the 2014 Daytona 500 was recorded at 145.29 miles per hour which is a correct description of 145.2

vichka [17]

Just answered this one. It was D.

4 0

3 years ago