In some? country's congress, the number of representatives is 20 less than five times the number of senators. there are a total of 520 members. find the number of senators and the number of representatives.

Step-by-step explanation:

Let s represent the number of Senators in the Congress. Then the number of Representatives is (5s-20) and the total number of members is ...

  s + (5s -20) = 520

  6s = 540 . . . . . . . . . add 20, simplify

  s = 90 . . . . . . . . . . . divide by 6

The number of Senators is 90; the number of Representatives is 430.

You can find the number of Representatives either as 520 -90 = 430 or as 5·90 -20 = 430.

(w – 2.5)(w + 2.5)

(–4v – 9)(–4v + 9)

step-by-step explanation: