Answer:
x⁴ + x³ + 4x² - 5x
Step-by-step explanation:
The polynomials given in the question are:
x⁴ - 3x + 1
4x² - 2x + 8
x³ - 9
We have to add all them
First write all the polynomial in the summation form:
(x⁴ - 3x + 1) + (4x² - 2x + 8) + (x³ - 9)
Open the brackets:
x⁴ - 3x + 1 + 4x² - 2x + 8 + x³ - 9
Group together the similar terms
(x⁴) + (x³) + (4x²) + (-3x -2x) + (1 + 8 - 9)
Finding the sum in brackets:
x⁴ + x³ + 4x² + (-5x) + (0)
x⁴ + x³ + 4x² - 5x
Note that the sum is in descending powers of x
Answer:
I think the answer would be B) a concert allows 100 people to enter every 20 minutes
Answer:
f(x) ≤ -5
Step-by-step explanation:
There are 10 students and 3 are selected. When 1 freshmen is selected, it leaves 9 students and 2 slots. There are 72 different events because there are 9 students for the first one of those two and 8 for the other. You then have to find how many of them have 1 freshmen and 1 junior. There are 12 events were a freshmen is chosen after a junior and 12 were they are chosen before a junior. (3x4). this means that 24/72 events meat the criteria so their is a 1/3 or 33.3% chance.
