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SIZIF [17.4K]
2 years ago
14

Suppose a certain company sell reg keyboards for $82 and wireless $110 last week the store sold three times as many regular keyb

oards as wireless. If the total sales were 4628 how many was sold?
Mathematics
1 answer:
shutvik [7]2 years ago
3 0

Answer:

3,471 regular keyboards sold

1,157 wireless keyboards sold

Step-by-step explanation:

To represent this scenario use this system of equations:

x + y = 4628

x = 3y

x = regular keyboards

y = wireless keyboards

The first equation represents how many regular and wireless keyboards were sold to equal 4,628 units of keyboards.

The second equation represents how there are three times as many regular keyboards sold than wireless.

Solve this by plugging in x in the second equation to the first equation:

(3y) + y = 4628

4y = 4628                        Add the y's together to get 4y

y = 1,157

Therefore, 1,157 wireless keyboards were sold

To find how many regular keyboards were sold, plug y back into the second equation:

x = 3(1157)

x = 3,471

The final answer to this problem is that 3,471 regular keyboards were sold and 1,157 wireless keyboards were sold.

Hope this helps!! If you have any questions about the work please let me know!

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<em><u>Question:</u></em>

Is square root of 1.6875 a rational number ?

<em><u>Answer:</u></em>

Square root of 1.6875 a rational number is not a rational number

<em><u>Solution:</u></em>

Given that we have to find square root of 1.6875 and determine if it is rational number or not

Let us first find square root of 1.6875

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Let us understand about rational number

A rational number is a number that can be expressed as a fraction (ratio) in the form \frac{p}{q} where p and q are integers and q is not zero.

When a rational number fraction is divided to form a decimal value,  it becomes a terminating or repeating decimal.

So the number 1.29903810568 is not a rational number

<em><u>In other words we can say,</u></em>

Only the square roots of square numbers are rational. Here 1.6875 is not a perfect square. So it is not rational number

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