Answer:
the mean is 7
Step-by-step explanation:
used a mean calculator
Step 1: x²-15=2x
step 2: x²-2x-15=0
step 3: (x-5)(x+3)=0
step 4: x-5=0 or x+3=0
step 5: x=5 of x=-3
Answer:
(-∞,4)
Step-by-step explanation:
the value is going down from the right until it reaches the vertex
20/21 is the answer to your problem.
