21.
In the standard equation for a line, what does the variable b stand for?
y = mx + b
X-coordinate
y-coordinate
y-intercept
slope

You're locked out of your house. the only open window is on the second floor, 25 feet above the ground. there are bushes along the edge of the house, so you will need to place the ladder 10 feet from the house. what length ladder do you need to reach the window?

Serena is making an experiment. for that, she needs 20 grams of a 52% solution of salt. she has two large bottles of salt water: one with 40% and the other with 70% of salt in them. how much of each must she use to make the solution she needs? i am in need of

If tan2a=cot(a+60), find the value of a, where 2a is an acute angle