If sum of two number is 36 and their difference is 10 find two number

Which of the fallowing best completes the sequence 5,10,15, a) 30 b) 22 c)25 d)35

What would be the reasons for lines 3 and 4? a. addition property; subtraction property b. addition property; solve c. substitution property; subtraction property d. substitution property; prove

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