Answer:15=4x=2x 6x=15x=5/2x=2.5
Step-by-step explanation:
No bc Lisa didn’t add all of the numbers together. When finding the mean you add all numbers together then divide by how many numbers you have.
Answer:
87 adults
174 children
70 students
Step-by-step explanation:
Answer:

Step-by-step explanation:
x^3+3x^2-x+2x^2+6x-2
To simplify this expression completely we combine like terms
3x^2 and 2x^2 are like terms
3x^2 + 2x^2 is 5x^2
-x and 6x are like terms
-1x + 6x is 5x


We cannot simplify more because all terms are unlike terms.