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mash [69]
3 years ago
12

One number is times a first number. A third number is 100 more than the first number. If the sum of the three numbers is ​, find

the numbers. The three numbers are nothing. ​(Use a comma to separate answers as​ needed.)
Mathematics
1 answer:
s2008m [1.1K]3 years ago
7 0

<em>Question:</em>

<em>One number is 7 times a first number. A third number is 100 more than the first number. If the sum of the three numbers is 505, Find the numbers. </em>

Answer:

The numbers are 45, 315 and 145

<em></em>

Step-by-step explanation:

Represent the three numbers with A, B and C

Required

Find A, B and C

From the first statement;

B = 7 * A

B = 7A --- (i)

From the second;

C = 100 + A  ---- (ii)

From the third;

A + B + C = 505  ---- (iii)

Substitute 7A for B and 100 + A for C in (iii)

A + 7A + 100 + A = 505

Collect like terms

A + 7A + A = 505 - 100

9A = 405

Divide both sides by 9

A = 45

Substitute 45 for A in (i)

B = 7A

B = 7 * 45

B = 315

Substitute 45 for A in (ii)

C = 100 + A

C = 100 + 45

C = 145

<em>Hence, the numbers are 45, 315 and 145</em>

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Answer:

Part a)

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Part b)

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Step-by-step explanation:

Part a)

Let

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substitute

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Answer:

1.  Formula is A2 : A9 = COUNT( A2: A9 ) = 8

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