Solve the system of equations using the linear combination method.
8,5- 4.6 = 2.4
2.5x + 4.6 = 14.1

Which sum or difference identity would you use to verify that cos (180° - ∅) = -cos ∅? a. sin (α -β) = sin α cos β – cos α sin β b. cos (α -β) = cos α cos β – sin α sin β c. cos (α -β) = cos α cos β + sin α sin β d. sin (α + β) = sin α cos β + cos α sin β

If the measure of angle 1 is 110 degrees and the measure of angle 3 is (2 x+10 degree), what is the value of x?

You decide instead to take the train there. the train will take 135 minutes. convert this into hours and minutes.