Answer:
x = -1
y = -5
Step-by-step explanation:
9(2y+9) - 8y = 31
18y + 81 - 8y = 31
10y + 81 = 31
10y = -50
y = -5
2(-5) + 9 = x
-10 + 9 = x
-1 = x
Answer:
Both groups had prepared for the exam. Therefore music would not really affect performance. Reassurance is given in every exam so distractions are not blind generally and most certainly not in this context where the scores were compared afterwards.
Step-by-step explanation:
Answer:

Step-by-step explanation:









Answer:
-4
Step-by-step explanation:
Isolate the x. Note the equal sign. What you do to one side, you do to the other.
Subtract 9 from both sides
x + 9 (-9) = -4 (-9)
x = -4 - 9
x = -13
-13 is your solution
hope this helps