Me with this math question:

a triangle has sides of length 11 m, 12 m, and 16 m.
what is the measure of the angle opposite the side that is 16 m long? (round to the nearest degree.)

a) 20°
b) 34°
c) 74°
d) 88°

If a =6, what is the value of 2a(3b + 5c)?

Asquare has a side that measures 11 units. what is the area of a circle with a circumference that equals the perimeter of the square? use 3.14 for π, and round your answer to the nearest hundredth. 1519.76 units2 379.94 units2 616.56 units2 154.14 units2

For what values of the variable x is the expression square root of 7x+14+ square root of 7-x a real number?