Type both equations into an algebra calculator from the website maths papa really accurate and shows working!!
RT = RS + ST
60 = 3x -16 + 4x -8
60 = 7x - 24
84 = 7x
84/7 = 7x/7
12 = x
RS = 3x - 16
RS = 3(12) - 16
RS = 36 - 16
RS = 20
The right answer will be A
5x = x^2 + 4
x^2 - 5x + 4 = 0
(x - 4)(x - 1) = 0
x = 4, 1
(x + 6)^2 = 100
x + 6 = +/1 sqrt100
x + 6 = +/- 10
x = 4, -16
$2.189 there uu go.......
