Answer:
-2x³ - 2y² + z⁴
Step-by-step explanation:
Step 1: Write out expression
x³ - 2y² - 3x³ + z⁴
Step 2: Combine like terms (x³)
-2x³ - 2y² + z⁴
So firstly, you'll want to multiply 1/2 and (n-4) and also reverse the signs in (2n+3), and your equation will look like this:

Next, you'll want to combine like terms, and your equation will look like this:

Next, subtract 1/2n on each side. Your equation will look like this:

Lastly, you'll divide 1.5 on each side, and your answer should be
The mean is the average. If the mean of 4 letter (a,b,cd) is 12, the sum of them would be 12x4 =48
Now add e to the total: 48 + 50 = 98
The mean is the total divided by the quantity:
Mean = 98 /5 = 19.6