You need to ask the question while you say you have troubles, But what can I help you with?
[ Answer ]

[ Explanation ]
- Simplify / Solve: (5 ÷ 5) ÷ 5 · (
- 5)
--------------------------------
(
- 5)
- Apply Rule (
= 1):
= 1
(
- 5)

1 · (
- 5) = 20
= 
20 ÷ 5
= 4
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Answer:
b 17/18
Step-by-step explanation:
Solve the one's in bracket then later solve everything together
The equation would be .34 + .21(x -1) = C where x is the number of ounces and C = the cost. Let x = 4 to answer the question.
.34 + .21(4-1) = C Do the work in the parentheses
.34 + .21(3) = C multiply
.34 + .63 = C Add
.97 = C
The cost to mail the letter is $0.97.
X/10=5000 -- multiply by 10
x=50000
5000 is 1/10 of 50,000