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satela [25.4K]
3 years ago
9

I don’t think this is correct but I got an area of 21.Can anyone help me or correct me on my error??

Mathematics
1 answer:
mina [271]3 years ago
5 0
Cut the figure into 2 parts, like you already have here. 
There are now two parts with the dimensions of 3 x 3 and 2 x 9.
Multiply 3 x 3. That is 9. 
Multiply 9 x 2. That is 18.
Add together 18 and 9. That is 27. 
The answer is B, 27 in². 
Hope this helps!
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Explain whether or not the plant labeled p(x)=x2+x+3 has any rational or irrational roots.
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frational roots are those numbers that can be written in form \frac{a}{b} where a and b are integers (integers are like -5,-4,-3,-2,-1,0,1,2,3,4, etc)

some examples are 1=1/1, 2=2/2, -4=-4/1, 4/3, 0.111111111111=1/9, etc

irrational numbers are numbers that can't be written that way like pi

numbers that involve √-1 or a square root of any negative number are called complex numbers and are neither rational nor irrational.


roots are the values of x that makes the function equal to 0


p(x)=x^2+x+3

set equal to 0

0=x^2+x+3

I can't factor so use quadratic formula

for 0=ax^2+bx+c

x=\frac{-b \pm \sqrt{b^2-4ac}}{2a}

so

x=\frac{-1 \pm \sqrt{1^2-4(1)(3)}}{2(1)}

x=\frac{-1 \pm \sqrt{-11}}{2}

√-11 is a square root of a negative number so it is a complex number. therefore, the function does not have rational or irrational roots


p(x) has no rational or irrational roots

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3 years ago
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How can systems of equations be used to represent situations and solve problems?
uysha [10]

Answer:

To solve real world problems, we can use the relationship between the quantities and form equations which represent the situation given in the problem. Then, we can use these equations to solve the problems.

Step-by-step explanation:

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Please need help explanation need it
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308 m^3

Step-by-step explanation:

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