The ratio of the boys to girls in the cafeteria is 3: 4. if there are 40 more girls than boys, how many girls are in the cafeteria?

Ineed to know the answer to this algebra question.

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°

Write 5(6x+4)-2(5x-2) in the form a(bx+c) where a,b and c integers and a> 1