Since the first equation gives you an expression for y, it is convenient to use that in the second equation. Since the second equation has a factor of 3 that can be removed from all terms, it may make the math easier to do that.
Revised 2nd equation:
.. x -y = 1
Substituting for y:
.. x -(2x +4) = 1 . . . . . use the expressiion for y in place of y
.. -x -4 = 1 . . . . . . . . . simplify
.. -4 = 1 +x . . . . . . . . . add x
.. -5 = x . . . . . . . . . . . subtract 1
y = 2x +4
.. = 2(-5) +4
.. = -6
The solution is (x, y) = (-5, -6).
Answer:
50 people
Step-by-step explanation:
-An experimental unit is any physical entity or person or animal that can be randomly assgned to a treatment.
-Such a unit is usually referred to as a unit of statistical analysis.
-Both control and actual experimental units are units of statistical analysis despite receiving different treatments.
-Hence, the experimental units of the study is 50 people.
Answer:
-72
Step-by-step explanation:
Divide by 3 on both sides (x and -216) and you get x= -72. It's negative because the three is positive and the product is negative, so x must be negative.
Answer:
9
Step-by-step explanation:
9x4=36
Answer:
32 adult tickets and 49 student tickets
Step-by-step explanation:
Step-by-step explanation: 32 x $11.50= $368 adult tickets 49 x $8=$392 student tickets