Answer:
13. Slope: -3
14. D ; y = 18
15. ?
Step-by-step explanation:
13. 4 - 1 = 3
-3 - 6 = -9
3/-9 = -3
To find the surface area of a prism, we must find the area of each side and add them up.
Let's first find the area of the triangular base.
The area of a triangle is

Where b is the base length and h is the height.
The base length of the triangle is 10.5. The height is 10.

The triangular base has an area of 52.5 cm².
The triangular top must also have the same area. Thus, it also has an area of 52.5 cm².
Now we to find the length of the 3 rectangles on the side of the prism.
The formula for the area of a rectangle is

where

is the width and

is the length.
All rectangles have a width of 8. They all have different lengths. If we find the area of all the rectangles, we have the following:



Now, add up ALL the areas we found. We'll have our surface area once we do this.

The surface area is 385 cm². Hope this helps! :)
Given:
1 pack = 5 pencils and cardboard.
1 pack must be between 60 grams and 95 grams
60g < x < 95g ; where x represents 1 pack.
Card board: 15 grams.
95g - 15g = 80g maximum total weight of 5 pencils
80g / 5 = 16g maximum weight of a single pencil
60g - 15g = 45g minimum total weight of 5 pencils
45g / 5 =9g minimum weight of a single pencil
9 < x < 16 ; where x represents a single pencil in the pack.
Answer:
$320
Step-by-step explanation:
Use your calculator ........................