Please help me with these 5 questions, please please. Don't ignore me, as it's due at 1:00. Please, please and thank you.

What is the value of x when x + 7 = 21?

Choose the equation below that represents the line that passes through the point (2, 4) and has a slope of 3. a) y − 4 = 3(x − 2) b) y − 2 = 3(x − 4) c) y + 4 = 3(x + 2) d) y + 2 = 3(x + 4)

Look at triangle wxy what is the length (in centimeters) of the side wy of the triangle?