Answer:
$9.87
Step-by-step explanation:
first, find the cost per pound:
$16.45: 5 pounds
divide both sides of the ratio by 5
$3.29: 1 pound
Then, multiply both sides by 3 to find the cost for 3 pounds
$9.87: 3 pounds
The length of the rectangle is defined by
.
Geometrically speaking, the rectangle area is equal to the product of its base and its length. According to the statement the area is represented by a <em>third</em> <em>order</em> polynomial and width by a <em>first order</em> polynomial and, thus, length must be a <em>second order</em> polynomial.
By factor the polynomial we get the following roots:

Then, the length of the rectangle is defined by
.
To learn more on rectangles, we kindly invite to check this verified question: brainly.com/question/10046743
2/(x-4)-1/(x+3)
(2(x+3)-1(x-4))/(x-4)(x+3)
(2x+6-x+4)/(x-4)(x+3)
(x+10)/(x-4)(x+3)
x + x+1 + x+2 =81
Simplify:
3x + 3 = 81
Subtract 3 from both sides
3x = 78
Divide both sides by 3
x = 26 or C). 26