Plz help me on this I dont understand how to do it. B.) SUBSTITUTION METHOD

1) 2x + 8y = 20 2) x = 5
y = 2 2x + y = 10

The table represents a function f(x). what is f(3)? a.-9 b.-1 c.1 d.9

An account with a $250 balance accrues 2% annually. if no deposits or withdrawals are made, which graph can be used to determine approximately how many years will it take for the balance to be $282? it's e2020 ni️️as

*let m∠cob = 50°30’, m∠aob = 70° and m∠aoc = 20°30’. could point c be in the interior of ∠aob? why? a. point c could be the interior of aob but it is not the only case b. point c is the interior of aob c. point c is not the interior of aob d. the given is not possible for the plane geometry answer