**Answer:**

idk sry

**Step-by-step explanation:**

**Answer:**

Mean: 72.8

Range: 28

**Step-by-step explanation:**

60, 66, 70, 71, 75, 80, 88

Mean: 60 + 66 + 70 + 71 + 75 + 80 + 88 = 510/7 = 72.8

Range: 88 - 60 = 28

-- A rectangle has 4 sides.

-- Each side has the same length as the side directly across from it.

-- So there are two sides that are both the width of the rectangle,

and another two sides that are both the length of the rectangle.

-- In this particular rectangle, when you add up all four sides,

the sum is 32 feet.

-- The width of the rectangle is 9 feet. So there are two sides that are

both 9 feet. When you add those up, you have 18 feet.

-- The REST of the 32 feet belongs to the other two sides.

That much is (32 - 18) = 14 feet. That's what the other two

sides add up to when you add them.

-- The other two sides are equal. So each of them is half of 14 = **7 feet **.

This rectangle, or the description of it, is slightly weird.

The length of the rectangle is shorter than the width.

But that's OK. Two sides are 9 feet, and two sides are 7 feet, and

when you add them all up, you get 32 feet, so our solution is correct.

Let them call the sides anything they want to.

**Answer:**

That is a picture of the answer and the explanation

**Step-by-step explanation:**

**Answer:**

1. D

2. B

3. A

4. C

**Step-by-step explanation:**

**1. **Vertical angles are a pair of opposite angles formed by the intersection of lines. Choice **D **has two lines intersecting, and two opposite angles formed by it.

**2. **Adjacent angles are two angles that have a common vertex and common side but do not overlap. Choice **B **is two angles with a common vertex and common side, and they don't overlap.

**3. **Supplementary angles are angles that add up to 180 degrees/make a straight angle. Choice **A **has two angles that add up to 180 degrees, and the two angles combined make a straight angle/line.

**4. **Two angles are called complementary angles if they add up to 90 degrees and form a right angle. Choice **C **has two angles that form a right triangle, meaning it adds up to 90 degrees.