Answer:
The correct option is D.) Causation cannot be determined from an observational study.
Step-by-step explanation:
The conclusion is not correct because
D.) Causation cannot be determined from an observational study.
Causation determined from an observational study is speculative and cannot be confirmed without data from a real experiment.
If you multiply the top equation by -2 you get:
-4x -14y = 14 => -4x = 14+14y
now you can plug in the -4x into the second equation:
14+14y - 3y = -19 => 11y = -33 => y=-3
Fill in y=-3 in either equation to find x:
2x - 21 = -7 => 2x = 14 => x=7
So your ordered pair is (7,-3)
In this instance the distance will be the hypotenuse of a right angle triangle.
x = 300/sin30 = 600
They are 600 ft away from each other
Answer:
x = -2 y = 3
Step-by-step explanation:
Equation 1: y = -x + 1
Equation 2: 23 = 5y -4x
Take and plug in what y equals (from equation 1) into equation 2
23 = 5(-x+1) - 4x
23 = -5x + 5 - 4x
23 = -9x + 5
18 = -9x
x = -2
Then plug the -2 in to the first equation for x
y = -(-2) + 1
y = 2 + 1
y = 3
