Which expression shows that 11+7=5+13? A. (5+6) + 7 = 5 + (6+7)

B. 6+6+6=18

C. 5+9+4 = 6+7+5

D. (11+4) + 3 = (5+7) + 6

Find the slope of the line below . enter your answer as a fraction or decimal. use a slash mark ( / ) as the fraction bar if necessary

What are the measures of ∠a, ∠b, ∠c and ∠d? explain how to find each of the angle measure.

Aladder that is 20ft long is leaning against the side of a building. if the angle formed between the ladder and the ground is 75 degrees how far is the bottom of the from the base of the building?