Answer: (-3, -5)
<u>Step-by-step explanation:</u>
-6x + y = 13
<u> 6x + 3y</u> = <u>-33 </u>
4y = -20
<u> ÷4 </u> <u>÷4 </u>
y = -5
6x + 3y = -33
6x + 3(-5) = -33
6x - 15 = -33
6x = -18
x = -3
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Answer: (, 2)
<u>Step-by-step explanation:</u>
9x + y = 5 → 1(9x + y = 5) → 9x + y = 5
3x - 3y = -5 → -3(3x - 3y = -5) → <u> -9x + 9y</u> = <u>15 </u>
10y = 20
<u> ÷10 </u> <u>÷10 </u>
y = 2
9x + y = 5
9x + (2) = 5
9x = 3
x =
Solve for y
let's put our equation first
Flip the equation
Now follow the rule of
_________________________
_________________________
add to both sides
Divide both sides by
would equal
The value of the 3 in 6300 is 300 because it is in the hundreds place.
Hope this helps!!
Substitute x into the second equation:
3(6y-11)-2y=-1
18y-33-2y=-1
16y=32
y=2
Then put the y value into the first equation to get x:
x=6(2)-11
x=1
There you go!
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Answer:
(351.04, 368.96)
Step-by-step explanation:
Given that population mean= 360
Std devitaion = 4
margin of error = 2.5%= 0.025
Since population std deviation is known we can use Z critical value
For two tailed critical value for 2.5% would be
2.24
Margin of error = ±Critical value*std deviation
= ±2.24(4)
= ±8.96
Confidence interval =(Mean - margin of error, mean + margin of error)
=