Area: 20 x 30 so 600
perimeter: 20 + 20 + 30 + 30 = 100
Answer:
2.1
Step-by-step explanation:
Use the equation
Sum of elements = average x number of elements
sum = (6)(4)
sum = 24
Add up the numbers we know: 3.4 + 10.7 + 7.8 = 21.9
24 - 21.9 = 2.1
This means the fourth number is 2.1
1. 36x + 4
2. 30n + 42
3. -24p + 32
4. 24p -28
5. 15m - 30
6. 5x + 45
If he does three hours, its 9 strips, for four, its 12, six is 18, seven is 21, and nine is 27