7x - 3y = 4 => 7x = 3y + 4 => x = (3y + 4) / 7 2x - 4y = 1 => 2x = 4y + 1 => x = (4y + 1) / 2
=> (3y + 4) / 7 = (4y + 1) / 2 (3y + 4) * 2 = (4y +1) * 7 6y + 8 = 28y + 7 22y = 1 Y = 1/22 =>you can substitute y for the system of equations and find x
Answer:
P_1st year = P0 x (1 + r/n) = P0 x (1 + r/n)^1
P_2nd year = P0 x (1 + r/n) (1 + r/n) = P0 x (1 + r/n)^2
...
P_n year = P0 x (1 + r/n)^n
Hope this helps!
:)
A) 1:3. Add 16, 4, 20, and 8= 48. Then simplify 16:48 = 2:6 = 1:3 :)
