Translate: twice the sum of a number and 9 equals 7 into an equation

1 answer:

4 0

$equals\ 7\to=7\\sum\ of\ a\ number\ and\ 9\to n+9\ (n-the\ number)\\twice\ the\ sum\ ...\to2(n+9)\\\\Answer:\boxed{2(n+9)=7}\\\\solution:\\\\2(n+9)=7\ \ \ \ |divide\ both\ sides\ by\ 2\\n+9=3.5\ \ \ \ |subtract\ 9\ from\ both\ sides\\\boxed{n=-5.5}$

You might be interested in

Is this a function?

vredina [299]

Answer:

Yes

Step-by-step explanation:

To be a function, the graph must pass the vertical line test.

The vertical line test is simple. Imagine you draw an infinite number of vertical lines. In all of these lines, it should never hit the function twice in the same x value.

For example, if it hits (4, 2) and (4, 7), the graph is not a function because there are two points with the same x value.

3 0

2 years ago

Read 2 more answers

Is (-2,3/4,-2/7,0) a set of real numbers

DedPeter [7]

Answer:

Yes

Step-by-step explanation:

All of these numbers are real numbers. None of them are complex numbers or irrational like <em>i</em>, s the answer is yes.

I have provided a chart to help you out with this topic.

Hope this helps! :)