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Sharon is paving a rectangular concrete driveway on the side of her house. The area of the driveway is [tex]55x^2 + 43x - 18[/tex], and the length of the driveway is [tex]x + 9[/tex].

Additionally, Sharon plans to install a carport over a small portion of the driveway. The volume that the carport can enclose is [tex]48x^3 + 68x^2 - 8x - 3[/tex], and the area of the driveway beneath the carport is [tex]8x^2 + 10x - 3[/tex].

Determine the width of the entire driveway and the height of the carport in terms of [tex]x[/tex]. Replace the values of [tex]m[/tex] and [tex]b[/tex] to complete the expression that represents the width of the entire driveway on the first line, and then replace the values of [tex]m[/tex] and [tex]b[/tex] to complete the expression that represents the height of the carport on the second line.


Sagot :

To determine the width of the driveway and the height of the carport, we need to use the given expressions for area, length, volume, and area beneath the carport.

### Step-by-Step Solution:

1. Given Information:
- Area of the driveway: [tex]\( 55x^2 + 43x - 18 \)[/tex]
- Length of the driveway: [tex]\( x + 9 \)[/tex]

2. To Find: Width of the driveway
- The width of a rectangle is found by dividing its area by its length.

[tex]\[ \text{Width of the driveway} = \frac{\text{Area of the driveway}}{\text{Length of the driveway}} \][/tex]

[tex]\[ \text{Width of the driveway} = \frac{55x^2 + 43x - 18}{x + 9} \][/tex]

3. Given Information:
- Volume of the carport: [tex]\( 48x^3 + 68x^2 - 8x - 3 \)[/tex]
- Area of the driveway beneath the carport: [tex]\( 8x^2 + 10x - 3 \)[/tex]

4. To Find: Height of the carport
- The height of a 3-dimensional rectangular space (like the carport) can be found by dividing its volume by the area of its base.

[tex]\[ \text{Height of the carport} = \frac{\text{Volume of the carport}}{\text{Area of the driveway beneath the carport}} \][/tex]

[tex]\[ \text{Height of the carport} = \frac{48x^3 + 68x^2 - 8x - 3}{8x^2 + 10x - 3} \][/tex]

Upon simplifying these expressions, we get the following results.

- The width of the driveway:

[tex]\[ \frac{55x^2 + 43x - 18}{x + 9} \][/tex]

- The height of the carport:

[tex]\[ 6x + 1 \][/tex]

### Final Answer:

Width of the driveway:
[tex]\[ \text{Width of the driveway} = \frac{55x^2 + 43x - 18}{x + 9} \][/tex]

Height of the carport:
[tex]\[ \text{Height of the carport} = 6x + 1 \][/tex]

Replace the values into the expressions:

- Width of driveway (first line):
[tex]\[ \frac{55x^2 + 43x - 18}{x + 9} \][/tex]

- Height of carport (second line):
[tex]\[ 6x + 1 \][/tex]