Estimate 20 9/11 ÷ 6 19/20

A. 147
B. 120
C. 4
D. 3

thanks in advance!

Find the quotient. 50a2 – 98b2 -5a +7b

Type the correct answer in the box. consider the system of linear equations below. rewrite one of the two equations above in the form ax + by = c, where a, b, and c are constants, so that the sum of the new equation and the unchanged equation from the original system results in an equation in one variable.

Using only odd number for numerators write two different subtraction problems that have a difference of 3/4