Multiplying Polynomials
(a+4)(a+7)
a^2+11a+28
2x^2+13x+21
(2x+7)(x+3)
f(x)=0.9x2−2x−3
-1.026, 3.248
45⋅42
47
An element with mass 310 grams decays by 5.7% per minute. How much of the element is remaining after 9 minutes, to the nearest 10th of a gram?
182.8
(a-7)(a-3)
a^2-10a+21
5x^2+54x+40
(x+10)(5x+4)
f(x)=2x^2+4x−5
-2.871, 0.871
3x33
34
An element with mass 730 grams decays by 27.6% per minute. How much of the element is remaining after 12 minutes, to the nearest 10th of a gram?
15.1
(a-7)(a-5)
a^2-12a+35
3x^2+11x+10
(x+2)(3x+5)
f(x)=0.9x2+2x−6.
-3.922, 1.7
(45)3
415
An element with mass 420 grams decays by 11.8% per minute. How much of the element is remaining after 16 minutes, to the nearest 10th of a gram?
56.3
(3x-4)(2x-8)
6x^2-32x+32
15x^2+19x+6
(3x+2)(5x+3)
f(x)=−2x2−26x−82.5
-7.5, -5.5
(52)6
512
A new car is purchased for 20300 dollars. The value of the car depreciates at 9.5% per year. What will the value of the car be, to the nearest cent, after 11 years?
6770.65
(x-2)(x+1)
x^2-x-2
6x^2+31x+28
(x+4)(6x+7)
f(x)=x^2+4.4x−2
-4.815, 0.415
(54)3
512
A new car is purchased for 23700 dollars. The value of the car depreciates at 13.5% per year. What will the value of the car be, to the nearest cent, after 10 years?
5557.88