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exis [7]
3 years ago
14

The difference between seven times one number and three times a second number is 25. The sum of twice the first and five times t

he second is 95.
Mathematics
1 answer:
alisha [4.7K]3 years ago
6 0
7a - 3b = 25
2a + 5b = 95

35a - 15b = 125
6a + 15b = 285
41a = 410
a = 10

7(10) - 3b = 25
70 - 3b = 25
-3b = -45
b = 15
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Answer:

options 1,3,4 are functions.

Step-by-step explanation:

RULE: a relation is said to be a function if every element in the domain ( the numbers in the left side in the below sets) is related to only one number ( number on the right side in the below sets).

Let us check each option one by one:

1.   3           2

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so this relation is a function

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3.  -2    -4

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    6      8

    -6    -8

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4.  1     3

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Answer:

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Step-by-step explanation:

Here, the given expression is  "24 over 30".

The given expression is  is equivalent to \frac{24}{30}

Now by Prime Factorization:

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30  = 2 x 3 x 5

⇒ The common factors in 24 and 30 is  2 x 3  = 6

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