What is the area on this?

Area of the rectangle is length x width =  5 x 10 = 50 sq. cm

Area of the triangle is 1/2 x base x height, base = 17-10 = 7, height = 5

Area = 1/2 x 7 x 5 = 17.5 sq.cm

Total area = 50 + 17.5 = 67.5 sq. cm.

x = 10.1

step-by-step explanation:

all of the angles of a tirangle add up to 180º

180 - 65 = 115 (since we already know the value of one angle)

(2x + 7) + (8x + 7) = 115

(combins like terms) 10x + 14 = 115

(isolate the variable subtract 14 from both sides): 10x = 101

(find the variable divide both sides by 10): x = 101/10

x = 10.1

lockers 1, 4, 9, 16, 25, 40, and 49 are open

i ran through it by the other answer is wrong