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kykrilka [37]
3 years ago
11

Susan purchased a prepaid phone card for $ 20 . Long distance calls cost 23 cents a minute using this card. Susan used her card

only once to make a long distance call. If the remaining credit on her card is $ 13.79 , how many minutes did her call last?
Mathematics
1 answer:
ddd [48]3 years ago
7 0

27 minutes long  because 23 multiplied by  27 is 621 and 20 subtracted by 13.79 is 6.21 and u have to find how much cents add up to that

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If x is Equal to 7, what is 7 divided by 3 and round it up
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Answer:

2.3 or 2

Step-by-step explanation:

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Paha777 [63]

Step-by-step explanation:

Mean =sum of values /number of values

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2 years ago
Are these triangles congruent? If so, why?
N76 [4]
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5 0
3 years ago
A jet flies at a rate of 1.3x10^3 feet per hour . Written in scientific notation which is the best estimate of how many feet the
vichka [17]

Answer:

3 * 10^6 if the answer is 3.64 * 10^6, you really ought to argue the meaning of estimate with your instructor.

Step-by-step explanation:

This is a very valuable question. Put your calculator away when you answer it. Using a calculator is sort of cheating.

1.3 * 10^3 roughly is roughly 1 * 10^3

2.8*10^3 hours is roughly 3 * 10^3

Forget the powers for now and just work with the 1 and 3

1*3 equals 3.

10^3 * 10^3 = 10^6 when the base of two numbers is the same (10 in this case) then the powers are added.

10^(3 + 3) = 10^6

So the answer is roughly 3*10^6

Now you can take out your calculator and get the answer.

1.3*10^3 * 2.8 * 10^3 = 3.64 * 10 ^ 6

Notice that the estimate (done in my head) is close enough to tell you what the answer should be. On a test, that's a very handy skill.

5 0
3 years ago
What’s the answer!?!?!?
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Answer:

x=1/2

Step-by-step explanation:

10-2x=14x+2

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5 0
3 years ago
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