Simplify the expression: 2√  20  −   3√  7  −   2√  5  +   4√  63  .           a. 2√  20  −   3√  7  −   2√  5  +   4√  63    b. 2√  20  −   3√  7  +   4√  63    c. 2√  5  +   9√  7    d. 2√  20  −   4√  7  −   2√  5  plz

Find the total area for the regular pyramid ( follow the answer set up in the picture)

Which of the following is the equation of a line that passes through the point (1,4) and is parallel to the x-axis a. y=1 b. y=4 c. x=1 d. x=4

Carson has only $20 bills and $10 bill in her wallet. the total value of the bills is $50. she has 1 more $20 bill than $10 bills. how many each kind of bill does carson have? a. one $20 and two $10 bills b. two $20 bills and one $10 bill c. one $20 bills and three $10 bills d. two $20 bills and two $10 bills