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Marina86 [1]
3 years ago
11

Which of the following is a true statement?

Mathematics
1 answer:
stepladder [879]3 years ago
6 0
We need to find a expression that is true. Let's try out every one of them until we get a right answer.

If n + 14 = -15 then n = -1.07143

Replace n with -1.07143.

-1.07143 + 14 = <span>12.92857
</span>
<span>12.92857 does not equal 15.

</span>So, the first option is incorrect.

<span>If 14 + n = -15, then n = -1

Replace n with -1

14 + (-1) = 13

13 is not equal to -15.

</span><span>If 14 + n = -15, then n = -29.0 

Replace n with -29.0

</span>-29.0 + 14 = -15

This expression is indeed true.

So, the answer to this question is <span>C If 14 + n = -15, then n = -29.0 </span>
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What is the range of f(x) = 3x + 9?
ziro4ka [17]

Answer:

The range is all real numbers.

Step-by-step explanation:

The function shown is a line (and not a horizontal line).

The range is all the y's on the graph or all the y's that can be generated by the equation of the function.

f(x) = 3x + 9

You could put ANY, literally any, number in place of the f(x) and be able to calculate an x for it. Looking at the graph of this line, you could go up and down the y-axis to infinity in either direction, and the graph of the line would be there.

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5 0
2 years ago
In this line of circles, the ratio of red circles to blue circles is 1:3 How many more circles would need to be added to make th
zaharov [31]

Answer:

The number of red circles to be added would be equal to 8 times the original amount of red circles

Step-by-step explanation:

Let

x ----> the number of red circles

y ----> the number of blue circles

Originally

\frac{x}{y}=\frac{1}{3}

y=3x ----> equation A

How many more circles would need to be added to make the ratio of red to blue 3:1

Let

n ----> the  number of additional red circles

\frac{x+n}{y}=\frac{3}{1} ----> equation B

substitute equation A in equation B

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solve for n

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therefore

The number of red circles to be added would be equal to 8 times the original amount of red circles

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