Answer properly or i will report and block you.

162 = 182 + 192 – 2(18)(19)cos(z)

256 = 324 + 361 – (684)cos(z)

256 = 685 – (684)cos(z)

–429 = –(684)cos(z)

to the nearest whole degree, the measure of z is
degrees.

Which statement accurately explains whether a reflection over the y-axis and a 270° counterclockwise rotation would map figure acb onto itself? a coordinate plane with figure acb with point a at 1, 1, c at 3, 4 and b at 5, 1 yes, a″c″b″ is located at a″(1, 1), c″(4, 3), and b″(1, 5) yes, a″c″b′ is located at a″(1, 1), c″(3, 4), and b″(5, 1) no, a″c″b″ is located at a″(1, 1), c″(4, 3), and b″(1, 5) no, a″c″b″ is located at a″(1, 1), c″(3, 4), and b″(5, 1)

For what value of (y) is 3^3/3^y =1/9

Plot a point at the y-intercept of the following function on the provided graph. 3y=-5x+7 20 points