Answer the following questions about complementary angles. Complementary angles are 2 angles that add up to 90 degrees. ∠1=20 so ∠2=

∠3=48 so ∠4=

∠5=15 so ∠6=
please help will give brainliest

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

Thompson and thompson is a steel bolts manufacturing company. their current steel bolts have a mean diameter of 127 millimeters, and a variance of 36. if a random sample of 35 steel bolts is selected, what is the probability that the sample mean would differ from the population mean by greater than 0.5 millimeters? round your answer to four decimal places.

The figure below shows rectangle abcd and the triangle eca on a coordinate plane.which of the following expressions represents the perimeter of triangle of triangle eca in units