Scores on a IQ test have a bell-shaped distribution with a mean of 100 and a standard deviation of 12. Use the empirical rule to determine the following. (A) what percentage of people has an IQ score between 64 and 136? (B) what percentage of people has an IQ score less than 64 abs greater than 136? (C) what percentage of people has an IQ score greater than 124?

hi

Step-by-step explanation:

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

898.1666667

step-by-step explanation:

5389/6 = 898.1666667