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Vladimir [108]
3 years ago
13

Use the x-intercept method to find all real solutions of the equation. x^3-9x^2+11x+21=0

Mathematics
1 answer:
IgorLugansk [536]3 years ago
7 0
We must graph y=x^3-9x^2+11x+21. Please, see the attached file.
Then we see were the graph cuts the x-axis, and these values of x are the real solutions of the given equation:

The real solutions of the given equation are:x = -1, 3, and 7

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Remove the largest common factor
zhenek [66]
I think you mean the greatest common factor to factor
this is useful because say you want to divide 100 by 1000 then the common factor is 100 so factor that out and get 1/10

so just find the factors or the whole numbers that multiply to get those numbers exg
factors of 18=2*3*3
note:2*3 means 2 times 3
so just find the factors and group the common ones exg
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factor
896=2*2*2*2*2*2*2*7
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3 0
4 years ago
Please answer below :-)
katrin2010 [14]

Step-by-step explanation:

\frac{2x - 1}{4}  +  \frac{x}{3}  = 2

find a common denominator of 12 for each fraction

\frac{3}{3}  \times  \frac{(2x - 1)}{4}  +  \frac{4}{4}  \times  \frac{x}{3}  =  \frac{12}{12}  \times  \frac{2}{1}

\frac{6x - 3}{12}  +  \frac{4x}{12}  =  \frac{24}{12}

\frac{6x - 3 + 4x}{12}  =  \frac{24}{12}

\frac{10x - 3}{12}  =  \frac{24}{12}

multiply both sides by 12

12 \times  \frac{10x - 3}{12}  =  \frac{24}{12}  \times 12

12s cancel out

10x - 3 = 24

add three to both sides

10x - 3 + 3 = 24 + 3

10x = 27

divide both sides by 10

\frac{10x}{10}  =  \frac{27}{10}

The tens on the left side cancel

x =  \frac{27}{10}  = 2.7

4 0
3 years ago
Find the area of a regular
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Answer:

The area of a regular polygon is A = (1/2)ap, where a is the apothem and p is the perimeter of the polygon.  

The apothem is 8 inches and the perimeter is 6(7) = 42 since there are 7 sides of 6 inches.  

Then the area is

A = (1/2)(8)(42) = 336/2 = 168 in2  

I hope this helped!

Step-by-step explanation:

Mark me as brainlist pleasee

8 0
3 years ago
A).
insens350 [35]

Answer:

.

Step-by-step explanation:

6 0
3 years ago
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