Tyesha found that the z-statistic was 2.1 and that the critical z-values were -1.96 and 1.96. Which of the folowing is a valid conclusion based on these results?
O One can reject the null hypothesis.
O One can reject the alternate hypothesis.
O One can accept the null hypothesis.,
O One cannot accept or reject the null hypothesis.

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

the correct answers i think are b. and d.

give me brainliest if it is correct!

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