How could you estimate to get approximate answer for this expression 12.3x {(2 x 1.7)+6}-2 cubed

Can someone check if i did this correct. it’s number 4 if you’re wondering.

What value is a discontinuity of x squared plus 8 x plus 4, all over x squared minus x minus 6?

Find the measure of angle y. round your answer to the nearest hundredth. ( type the numerical answer only) a right triangle is shown with one leg measuring 5 and another leg measuring 14. an angle across from the leg measuring 5 is marked y degrees. numerical answers expected!