Z = (X - mean)/sd
-1 = (28 - mean)/sd
mean - sd = 28 . . . (1)
-0.5 = (34 - mean)/sd
mean - 0.5sd = 34 . . . (2)
(1) - (2) => -0.5sd = -6
sd = -6/-0.5 = 12
From (1), mean = sd + 28 = 12 + 28 = 40
mean = 40
standard deviation = 12
The solution set for the both equation is (3,0) and (-1,0)
We have given that the equation

We have to determine the solution to the first equation
<h3>
What is the quadratic equation formula?</h3>





Now use this value we have to find the value of y
When x=3 then
y=(3)^2-2(3)-3
y=9-6-3
y=0
When x=-1 then y=1-2(-1)-3
y=1+2-3
y=0
Therefore the solution set for both equations is (3,0) and (-1,0).
To learn more about the solution set visit:
brainly.com/question/10588366
#SPJ1
Answer:there is no g .no h
Step-by-step explanation:how can we tell u have a calculator right
Answer:
suppose that is the answer