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WINSTONCH [101]
3 years ago
13

Which expression is equivalent to 10a + 6?

Mathematics
2 answers:
victus00 [196]3 years ago
8 0
There are a number of expressions that are equivalent to 10a+6.
To find them, you simply have to list the multiples of both 10 and 6.
10- 10 20 30 40 50 60 70 80 90 100
6- 6 12 18 24 30 36 42 48 54 60.
Then, when you multiply the fraction by anything, whether this is 2, 3 or 10, you just have to do this to both parts. 
All of the following expressions are equivalent to 10a+6
20a+12, 30a+18, 40a+24, 50a+30, 60a+36, 70a+42, 80a+48, 90a+54, 100a+60

Or, if you're looking to simplfy, then you have to find a common multiple, which is 2. Therefore, 2 goes outside of the bracket, and you then have to divide 10 by 2 to find out what goes inside the brack. 10a/2= 5a. 6/2=3, therefore, in a bracket, it becomes 2(5a+3)

Hope this helps :) 

Mekhanik [1.2K]3 years ago
6 0
2(5a+3)

Hope this helps!!

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Answer:

yes it is.

x = 4 and y = -3

Step-by-step explanation:

Solve simultaneously using elimination method:

equation 1 - equation 2

3x + y = 9 equation 1

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x = 4

plug 4 into any of the 2 equations and solve for y.

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vredina [299]

The present age of the mother is 30 years.

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

Step 1 :

At present,

  • Age of Jane = x
  • Age of Billy = 5x
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Step 3 :

After 2 years,

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Step 3 :

Age of mother at present + 2 years = Age of mother after 2 years

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Step 4 :

Substitute x=2,

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