15 POINTS which could be the first step in sloving the equation 2.5x + 1.2 = 1.2x + 4.2

A. add 4.2 to each side

B. divide both sides by 1.2x

C. add 2.5x to each side

D. subtract 1.2 from both sides

D. subtract 1.2 from both sides

Step-by-step explanation:

It is the subtraction property of equality.

d 25 pi/6

step-by-step explanation:

the diameter is 10 inches

the radius is 1/2 of the diameter or 5 inches

the area of the circle is

a = pi r^2

  = pi 5^2

  = 25 pi

the slice is 60 degrees of the entire circle.

60 degrees out of 360   60/360 = 1/6

the area of the slice is 1/6 of the circle

a slice = 1/6 a circle

a slice = 1/6 * 25 pi

answer: two angles are called supplementary if they add up to 180°. example: the two angles (140° and 40°) are supplementary because they add up to 180°.

step-by-step explanation: