In x+3(x+4)=20 you distribute the 3 to the x and 4 but what happens to that 3 afterwards

Abox contains 1 plain pencil and 4 pens. a second box contains 5 color pencils and 5 crayons. one item from each box is chosen at random. what is the probability that a plain pencil from the first box and a color pencil from the second box are selected? write your answer as a fraction in simplest form.

Divide. –4.2 ÷ 6 = a –0.7 b 0.7 c –7 d 7 me

Find the dimensions of the circle. area = 64π in.² r= in.