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notsponge [240]
3 years ago
13

Simplify this radical. V84

Mathematics
1 answer:
Yanka [14]3 years ago
8 0

Answer:

2\sqrt{21}

Step-by-step explanation:

84/4=21

Square root of 4=2

2\sqrt{21}

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Which of the following graphs represents the slope of -1 - 3 ​
sleet_krkn [62]

Answer:

theres nothing there though

Step-by-step explanation:

4 0
3 years ago
What types of solutions will a quadratic equation have when the discriminant b2 − 4ac in the quadratic formula is a perfect squa
netineya [11]

<em>The discriminant must be zero.</em>

Step-by-step explanation:

A Perfect-Square Trinomial is given by the form:

(\alpha x \pm \beta)^2=(\alpha^2x^2 \pm 2\alpha x \beta + \beta^2)

The discriminant in the quadratic formula is:

\Delta=b^2-4ac \\ \\ \\ Here: \\ \\ a= \alpha^2 \\ \\ b=2\alpha \beta \\ \\ c=\beta^2 \\ \\ \\ So: \\ \\ \Delta=(2\alpha \beta )^2-4(\alpha^2)(\beta^2) \\ \\ \Delta=4\alpha^2 \beta^2-4\alpha^2 \beta^2=0

So in order to get a perfect square,<em> the discriminant must be zero.</em>

<em></em>

<h2>Learn more:</h2>

Discriminant: brainly.com/question/1537997

#LearnWithBrainly

4 0
3 years ago
A photo of a painting measures 13 inches by 17 inches. The scale factor is 1/3. What size is the painting? A. 4.3 x 5.7
JulsSmile [24]

Answer:

The new size is  4.3 x 5.7

Step-by-step explanation:

The photo originally measures

13 inches x  17 inches

If we apply a scale factor of 1/3, this means that we multiply each size by one third

13 inches * (1/3)  = 4.333 in

17 inches * (1/3)  = 5.666 in

If we round up we get

4.3 in

5.7 in

The new size is  4.3 x 5.7

5 0
3 years ago
Hugh brought some magazines that cost $3.95 each and some some books that cost $8.95 each. He spent a total of $47.65 let m repr
gavmur [86]

Answer:

3.95m + 8.95b = 47.65

Step-by-step explanation:

From this problem, you get quite a handful of information.

The variable "m" represents the # of magazines Hugh bought.

The variable "b" represents the # of books Hugh bought.

One magazine [m] cost $3.95

One book [b] cost $8.95

The total cost of books and magazines is $47.65

Based on the information, you can create an equation with two variables, representing the total cost and how many of each magazine and book Hugh bought.

If one magazine cost $3.95, the amount of money he spent on magazines can be represented by 3.95m.

If one book cost $8.95, the amount of money he spent of magazines can be represented by 8.95b.

And lastly, if the total cost of magazines and books Hugh bought is $47.65, the following equation can be made:

3.95m + 8.95b = 47.65

So, "3.95m + 8.95b = 47.65" is the correct equation. I hope this helps! :)

7 0
3 years ago
Someone plz help me
erma4kov [3.2K]
The 1st layer has 1 cubes, which is also 1²,
the 2nd layer has 4 cubes, which is 2²
the 3rd layer has 9, which is 3²
the nth layer has n² cubes
4 0
3 years ago
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