(15pts and if correct you will earn brainliest) what is the value of the expression? −4.2(0.35−3.5) enter your answer in the box as a decimal.

What basic trigonometric identity would you use to verify that sin x cos x tan x =1-cos^(2)x?

How many solutions does the nonlinear system of equations graphed below have?

In the diagram, be and ad pass throughthe center of circle o, and the area ofsector aoc is 47.45 square units. what isthe area of sector boc? use the value =3.14, and round your answer to two decimalplaces.22.33 square units25.12 square units