Select the correct answer.
which data set has the greatest spread?
set a - (84, 91, 87, 77, 94, 89, 74)
set b - {89, 73, 84, 91, 87, 77,94)
set c- {73, 84, 89, 88, 77, 91, 87, 90}
set d - (84, 89, 88, 82, 91, 87, 99)
a set a
b. set b
c. setc
d. set d
reset
next
19 edmentum. all rights reserved

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

faster, im not sure why but i know it is faster