you basically do 1350 * 1/3 or 1350/3
yes to all 3 questions.
3x^2(x-1) + -3x^3+ 4x^2-2x+1
= 3x^3 - 3x^2 - 3x^3 + 4x^2 - 2x + 1
= x^2 - 2x + 1,
so a + b is a polynomial.
3x^2(x-1) - (-3x^3+ 4x^2-2x+1)
= 3x^3 - 3x^2 + 3x^3 - 4x^2 + 2x - 1
= 6x^3 - 7x^2 + 2x - 1.
so a - b is also a polynomial.
3x^2(x-1)( -3x^3+ 4x^2-2x+1)
= (3x^3 - 3x^2) ( -3x^3 + 4x^2 - 2x + 1)
= -9x^6 + 12x^5 - 6x^4 + 3x^3 + 9x^5 - 12x^4 + 6x^3 - 3x^2
= -9x^6 + 21x^5 - 18x^4 + 9x^3 - 3x^2.
so a * b is a polynomial.
37 = 15 + 15 + x + x
37 = 30 + 2x
7 = 2x
answer = x= 3.5
answer: d) 8 students
since $200 is already covered, you would subtract 200 from the total cost to find out how much you need left.
next, you do 400/50 because each student would cover $50.
therefore, your answer is 8 students.