Assume that the numbers are X and Y;
The sum of the two numbers is:
X+Y=-12
Their difference is:
X-Y=84
We can present the number X as a funsction from Y, from any of the equation. Let do that from the first: X=-12-Y
Now, in order to have only one unknown we will write X in this form in the second equation:
(-12-Y)-Y=84
-12-Y-Y=84
-12-2Y=84
-12-84=2Y
-96=2Y
Y=-96/2=-48
X=-12-Y=-12-(-48)=-12+48=36
Answer:
R(-2,0)
S(0,-4)
T(-4,-3)
Step-by-step explanation:
So first you gotta subtract 2 from each x value and 1 from each y value. After you do that, you get:
R(0,2)
S(-4,0)
T(-3,4)
then i put it all onto a graph, and rotated it 90* counterclockwise, from the origin, which puts it in quadrant 3, with the final coordinates above.
Answer:
it has to be b I don't know for sure tho
Answer :
I am not sure about this question sry but u can try asking a tutor u don't need to use any points
Answer:
a) n = 100
s = 8
Confidence interval = 95%
Z at 95% = 1.96
Confidence interval formula : to
Substitute the values :
Confidence interval : to
Confidence interval : to
b)n = 200
s =11
Confidence interval = 90%
Z at 90% = 1.64
Confidence interval formula : to
Substitute the values :
Confidence interval : to
Confidence interval : to