Simplifying expressions with integers 54-c+3c2-10
please i need help!!

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?

What is the slope of the line (-7,2) (4,6)

X² + 4y² = 36 the major axis runs along: a) y=4x b) x-axis c) y-axis