AB and CD are two chords of a circle that intersect at a point E. Arc AC has an arc measure of 84° and arc DB has an arc measure of 20°. What is the measure of ∠AED?

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

An initial investment of $100 is now valued at $150. the annual interest rate is 5%, compounded continuously. the equation 100e0.05t = 150 represents the situation, where t is the number of years the money has been invested. about how long has the money been invested? use your calculator and round to the nearest whole number. years

Two times a number plus three times another number equals 4. three times the first number plus four times the other number is 7. find the numbers