2. What do we call the little lines that divide number lines into equal parts?

Mathematics

1 answer:

xenn [34]3 years ago

8 0

Answer:

Step-by-step explanation:

A number line can be defined as a straight line with numbers placed at equal intervals. A number line can be extended infinitely in any direction and is usually represented horizontally. It can be used to represent both positive and negative integers. Every number on the number line has an absolute value, which simply means how far that number is from zero. The section of the number line between two numbers is called an interval. The distance between a number's place on the number line and 0 is called the number's absolute value..

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Answer:

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Step-by-step explanation:

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Find the x-intercepts/roots of the polynomial function. Also, identify the degree of the polynomial

Mrac [35]

Answer:

Step-by-step explanation:

roots=-2,-1,1,3

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interval of decrease=(-∞,-1.5)∪(0,4)

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3 years ago

In a certain function, y varies directly with x. If y = 6 when x = 8, find x when y = 9.

Hatshy [7]

If y = 6 when x = 8, then value of "x" when y = 9 is equal to 12

<u>Solution:</u>

Given that , In a certain function, y varies directly with x

And x = 8 when y = 6,

We have to find what will be the value of x when y = 9

Now, from the given information,

$\begin{array}{l}{y \alpha x} \\\\ {y=c x \rightarrow(1)}\end{array}$

where c is the proportionality constant

$\begin{array}{l}{\text { Now, substitute } x=8 \text { and } y=6 \text { in }(1)} \\\\ {\rightarrow 8=c(6) \rightarrow c=\frac{8}{6}} \\\\ {\rightarrow c=\frac{4}{3}} \\\\ {\text { Then, }(1) \rightarrow x=\frac{4}{3} y} \\\\ {\text { So, when } y=9} \\\\ {\rightarrow x=\frac{4}{3}(9)} \\\\ {\rightarrow x=4 \times 3} \\\\ {\rightarrow x=12}\end{array}$