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monitta
3 years ago
5

Find the sum: 28,35,42,49,56,63,70

Mathematics
2 answers:
lianna [129]3 years ago
5 0

Answer:

343

Step-by-step explanation:

Big brain calculator work

28 + 35 + 42 + 49 + 56 + 63 + 70 = 343

uranmaximum [27]3 years ago
3 0

Answer:

343

Step-by-step explanation:

28+35+42+49+56+63+70          <em>We are asked to find the sum, so we add all the numbers in the series.</em>

28+35+42+49+56+63+70 = 343

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How far is 75% of a 2,000-kilometer trip
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Step-by-step explanation:

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2 years ago
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7 0
3 years ago
Read 2 more answers
how many 4 digit numbers n have the property that the 3 digit number obtained by removing the leftmost digit is one ninth of n
Tom [10]

Answer:

  7

Step-by-step explanation:

We want to find the number 4-digit of positive integers n such that removing the thousands digit divides the number by 9.

__

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  n -1000d = n/9

  n -n/9 = 1000d . . . . . . add 1000d -n/9

  8n = 9000d . . . . . . . . multiply by 9

  n = 1125d . . . . . . . . . divide by 8

The values of d that will give a suitable 4-digit value of n are 1 through 7.

When d=8, n is 9000. Removing the 9 gives 0, not 1000.

When d=9, n is 10125, not a 4-digit number.

There are 7 4-digit numbers such that removing the thousands digit gives 1/9 of the number.

8 0
2 years ago
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