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3 years ago

Help me I don't get this plz

Mathematics

1 answer:

romanna [79]3 years ago

4 0

Your Answer is 286/15 OR 19 1/15. Why?

Take the 2 from the first fraction and multiply is by the denominator (5) to get 10, and then add it to the numerator (2) to get 11. Now you have 11/5

Then, take the 8 and multiply it by 3 to get 24, then add it to the numerator to get 26/3

26 x 11 is 286 and 3 x 5 is 15. So you get 286/15. 286 goes into 15 nineteen times (do 286 divided by 15 and you'll get 19.0666667, so you simply do 19 x 15 and you'll get 285, with 1 left, giving you 19 1/15)

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Which of the expression represents the Commutative Property of Addition?

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3 years ago

Question 5(Multiple Choice Worth 5 points)

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Answer:

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Step-by-step explanation:

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3 years ago

Read 2 more answers

Graph the circle (x+6)^2 + (y+5)^2 =9

Andrei [34K]

Answer:

This a circle centered at the point $(-6,-5)$ , and of radius "3" as it is shown in the attached image.

Step-by-step explanation:

Recall that the standard formula for a circle of radius "R", and centered at the point $(x_0,y_0)$ is given by:

$(x-x_0)^2+(y-y_0)^2=R^2$

Therefore, in our case, by looking at the standard equation they give us, we extract the following info:

1) $R^2 = 9\,\,\,then\,\,\,R=3$ since the radius must be a positive number and ( $R=-3$ ) is not a viable answer.

2) $x_0=-6$ for ( $x-x_0$ ) to equal $(x+6)$

3) $y_0=-5$ for ( $y-y_0$ ) to equal $(y+5)$

Therefore, we are in the presence of a circle centered at the point $(-6,-5)$ , and of radius "3". That is what we draw as seen in the attached image.

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3 years ago

A recycling plant recycled 4.9 kg of paper and cardboard the first hour and 7.8 kg/h

Daniel [21]

Answer: R = {0kg, 59.5kg}

Step-by-step explanation:

When we have a function f(x) = y.

The set of the possible values of x is called the domain of the function, and the set of the possible values of y is called the range of the function,

In this case, we have that:

the plant recycled 4.9kg the first hour, and 7.8 kg per hour after.

So this function can be written as piecewise function, with one part for the first hour, and another part for the time after the first hour.

F(x) = 4.9kg*x if 0h < x ≤ 1h

F(x) = 4.9kg + 7.8kg/h*(x -1) if x ≥ 1h

We use (x - 1) for the second part because if x = 1 h, we must have the same result in both parts of the function.

Where x is the number of hours.

And we know that the domain is (0hours, 8 hours)

Then the minimum value of y will be:

F(0h) = 4.9kg*0h = 0kg.

And the maximum value in the range will be:

F(8h) = 4.9kg + 7.8kg*7 = 59.5kg