I need assistance solving these questions using Cramers' Rule (which I am frankly terrible at) and need these to finish my homework, Thank you!

If two angles of a triangle have equal measures and the third angle measures 90°, what are the angle measures of the triangle? a. 60°, 60°, 60° b. 45°, 90°, 90° c. 30°, 30°, 90° d. 45°, 45°, 90°

Prove that 16^4-2^13-4^5 is divisible by 11.

Edger needs 6 cookies and 2 brownies for every 4 plates how many cookies and brownies does he need for 10 plates