The sum of two numbers, a and b, is 8.25. The difference between the two numbers is 0.75. Which equation can be used to determine the value of a? 2a = -9
2a = 7.5
2a = -7.5
2a = 9

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

What are the solutions to the equation 4x2+3x=24-x

Mr. and mrs. wallace have decided to buy a car for $21,600. they finance $15,000 of it with a 5-year auto loan at 2.9% arp. what will be their monthly payment be? a. $268.20 b. $268.86 c. $269.54 d. $387.16 i need !