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topjm [15]
3 years ago
9

How to solve [3(4.12) - 2(3.4)]+9

Mathematics
1 answer:
pshichka [43]3 years ago
3 0
1.61 is the correct answer
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** I need help for this one***
Zepler [3.9K]

Answer:

60

Step-by-step explanation:

the two angles are equal angle x and the one opposite

=180-40

=120 ÷2

=60

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3 years ago
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Factor the polynomial function over the complex numbers. f(x)=x^3-2x^2+3x-6
Airida [17]

f(x)=x^3-2x^2+3x-6=x^2(x-2)+3(x-2)=(x-2)(x^2+3)\\\\i=\sqrt{-1}\to i^2=-1\\\\x^2+3=x^2-(-3)=x^2-3i^2=x^2-(\sqrt3)^2i^2)=x^2-(i\sqrt3)^2\\\\\text{use}\ a^2-b^2=(a-b)(a+b)\\\\\boxed{f(x)=(x-2)(x-i\sqrt3)(x+i\sqrt3)}

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4 years ago
Describe a method for calculating the mean of a set of data explain why the method works
Aneli [31]
Well, you take a set of numbers and you find the biggest number and you subtract the smallest number from it. that is the mean and the mean is the average number.
6 0
4 years ago
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- A rectangular pool has an area of 140 square feet. If the length of the
Alik [6]

Answer:

8.75 feet

Step-by-step explanation:

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7 0
3 years ago
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Find the sum of -3x square- 4x +3 and 2x square -x +3​
Lady_Fox [76]

Answer:

−x²−4x+3−x+3

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Step-by-step explanation:

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