Please help! It would mean a lot!! Find the measure of angle y. Round your answer to the nearest hundredth. (please type the numerical answer only) (6 points)

22.62

Step-by-step explanation:

use cos: cos(x) = adjacent/hypotenuse = 12/3

simplify:

cos(x) = 12/13

x = cos^-1 ( 12/13) = about 22.62

go on the tube you might find some information there

225x²+4=0

225x²=0-4

225x²=-4

x²=-4/225

x=±√-4/225