Work out the lengths of sides a and b.
Give your answers to 1 decimal place.
17 cm
8 cm
12 cm
5 cm

step-by-stp

the correct answer is the section c

x = -3

y = -18

step-by-step explanation:

to solve by substitution, substitute one variable and solve for the other. then substitute again to find the remaining variable.

x-1/3(3x-9) = -3 since y=3x-9 substittute y.

x-1/3(3x-9)=-3

x + x +3 = -3

2x+3=-3

2x+3-3= -3-3

2x=-6

x=-3

substitute again into y=3x-9

y=3(-3)-9

y=-9-9

y=-18

lo98765432wqasdfghjkloi87654567890

step-by-step explanation:

2y+y=5

add 2y and y