Answer: 
Step-by-step explanation:
You need to remember the following:
1. The area of a rectangle can be calculated with the following formula:

Where "l" is the length and "w" is the width.
2. The area of a triangle can be calculated with the following formula:

Where "b" is the base and "h" is the height.
Use those formulas to find the area of each face.
<u> Area of the rectangle</u>

<u>Area of two triangles</u>
There are two equal triangles. Each one has a base of 10 inches and a height of 5 inches. Then, their areas are equal:

The areas of the other two triangles (which are equal) are:

Adding the areas of the faces, you get that the surface area of the rectangular pyramid is:

Answer:
Step-by-step explanation:
The supplement to ∠1 = 180°-135° = 45° = ∠3, so m is parallel to j and l.
∠2 ≠ 45° and ∠2 ≠ 135°, so k is not parallel to j, l, or m.
Answer:
Step-by-step explanation:
PEMDAS (order of operations)
2 times 8=16
18/3= 6
16+5-6=15
Answer:
10
Step-by-step explanation:
Answer: 5
Step-by-step explanation:
5x7=35
35-4=31