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3 years ago

Is -5 a rational number?

Mathematics

1 answer:

Tresset [83]3 years ago

6 0

Answer: Rational

Step-by-step explanation: -5 is an integer and all integers are rational numbers so -5 is rational.

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Simplify 3 ∙ 2x. What is the coefficient?

matrenka [14]

<span>3 ∙ 2x = 6x
so </span><span>coefficient = 6
</span>
hope it helps

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4 years ago

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Use the cubic model y = 6x3 - 5x2 + 4x – 3 to estimate the value of y when x = 2.

jeka94

Answer:

The answer is B.

Step-by-step explanation:

You have to substitute x = 2, into the equation of y :

$y = 6 {x}^{3} - 5 {x}^{2} + 4x - 3$

$let \: x = 2$

$y = 6 {( 2)}^{3} - 5 {(2)}^{2} + 4(2) - 3$

$y = 48 - 20 + 8 - 3$

$y = 33$

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3 years ago

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SimplifyLaTeX: \dfrac{\cos^2\alpha}{1-\sin\alpha}-1

Troyanec [42]

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3 years ago

The industrial process that is used to convert a fuel to gasoline is carried out at a temperature range of 660 degrees°F to 790

NARA [144]

Answer:

$|F-725|$

With F represent the variable of interest:

$-65< F-725< 65$

$-65+725< F< 65+725$

$660 < F< 790$

Step-by-step explanation:

For this case we have a normal limits for the temperature Range. The minimum is 660 F and the maximum 790 F.

We can find the midpoint of this interval like this:

$Midpoint= \frac{660+790}{2}= 725$

And the difference between the midpoint and the limits are:

$|790-725|= 65$

$|680-725|= 65$

So then we can create the following inequality:

$|F-725|$

With F represent the variable of interest.:

$-65< F-725< 65$

$-65+725< F< 65+725$

$660 < F< 790$

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3 years ago

Chantelle has signed up for hockey. Her parents set a limit of 40$ for costs for the season. It costs 25$ to sign up plus 0.75$

sweet [91]

X=(40-25)/.75

X= 15/.75

X= 20

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3 years ago