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3 years ago

Write 47/21 as a decimal rounded to the nearest tenth

Mathematics

2 answers:

aleksley [76]3 years ago

6 0

The answer is 2.2 .... hope this helps!! :D

Thepotemich [5.8K]3 years ago

3 0

2.2 is the rounded answer

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Choose the equation of the horizontal line that passes through the point (−5, 9).

shtirl [24]

The correct answer is: [B]: " y = 9 " .
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3 years ago

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Write an expression for "7 divided by <br> c."

Harman [31]

An expression for “7 divided by c” is 7/c or 7 ÷ c

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3 years ago

Factor out the greatest common factor <br>-5x^2 - 5x^3 - 15x^4

vaieri [72.5K]

Our answer is $-5x^{2} (3x^{2} +x+1)$

Our greatest common factor, or GCF, is $-5x^{2}$ , so when we factor is out, our divide each term by $-5x^{2}$ , we get our answer. To check this, we can multiply the $-5x^{2}$ back across the parenthesis and see if we get the same result as our initial question.

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5 0

3 years ago

Solve the equation in the complex number system. x^2-12x+40=0

mylen [45]

solving the equation $x^2-12x+40=0$ we get $x=6+2i\,\,and\,\,x=6-2i$

Step-by-step explanation:

Solve the equation:

$x^2-12x+40=0$

We can solve using quadratic Formula:

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

a= 1, b = -12, c = 40

Putting values:

$x=\frac{-b\pm\sqrt{b^2-4ac}}{2a}\\x=\frac{-(-12)\pm\sqrt{(-12)^2-4(1)(40)}}{2(1)}\\x=\frac{12\pm\sqrt{144-160}}{2}\\x=\frac{12\pm\sqrt{-16}}{2}\\We\,\,know\,\,\sqrt{-1}=i\\ x=\frac{12\pm4i}{2}\\ x=\frac{12+4i}{2}\,\,and\,\, x=\frac{12-4i}{2}\\ x=\frac{4(3+i)}{2}\,\,and\,\, x=\frac{4(3-i)}{2}\\x=2(3+i)\,\,and\,\,x=2(3-i)\\x=6+2i\,\,and\,\,x=6-2i$

So, solving the equation $x^2-12x+40=0$ we get $x=6+2i\,\,and\,\,x=6-2i$

Keywords: Solving quadratic equation

Learn more about Solving quadratic equation at:

#learnwithBrainly

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3 years ago

What is the interior angle sum of 31-gon

Vadim26 [7]

Sum of Interior Angles = (Number of Sides -2) • 180 degrees

Sum of Interior Angles = 29 * 180

Sum of Interior Angles = 5,220

4 0

3 years ago