Answer:
Her average is 75
Step-by-step explanation:
To be able to find the average of a group of numbers you must add them all then divide them by how many numbers that there are.
Step 1: Add all the values

Step 2: Divide

Step 3: Check your work

Step 4: Celebrate
You got the correct answer, now be proud of yourself.
Answer:
Acute
Step-by-step explanation:
Answer: 
Step-by-step explanation:
Given, the length of the rectangular dog run is 18 feet.
Formula: Perimeter = 2 ( length + width)
Let width be x.
Then, Perimeter = 2 (18 + x ) feet
The perimeter of the dog run must be at least 42 feet and no more than 72 feet.
That is

Divide inequality by 2, we get

Subtract 18 from each side, we get

Required inequality : 
Have you solved your problems yet