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faltersainse [42]
3 years ago
9

A 1lb box costs .50 to mail through the postal service. a 3lb box cost .92 to mail through the postal service. the postal servic

es calculates the weight to the whole pound. what functions represent the total cost f(x), to send a letter that is x pounds? select all that apply.
A- f(x)=0.21(x-1)+0.50
B- f(x)=0.50(x-1)+0.21
C- f(x)=0.50x
D- f(x)=0.21x+0.29
E- f(x)=0.21x
Mathematics
1 answer:
ser-zykov [4K]3 years ago
5 0

Answer:

- f(x)=0.50(x-1)+0.21

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option A

<u>Step-by-step explanation:</u>

Here we have , The sum of two positive integers, a and b, is at least 30. The difference of the two integers is at least 10. If b is the greater integer, We need to find which system of inequalities could represent the values of a and b . Let's find out:

Let two numbers be a and b where b>a . Now ,

  • The sum of two positive integers, a and b, is at least 30

According to the given statement we have following inequality :

⇒ a+b\geq 30

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According to the given statement we have following inequality :

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⇒ b-a+a\geq 10 +a

⇒ b\geq 10 +a

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