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Eddi Din [679]
3 years ago
8

Pls help i will give brainliest!!!!! :)

Mathematics
1 answer:
Zigmanuir [339]3 years ago
5 0

Answer: c.50 is the answer

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If it take 10 hours to get 50% how many hours are 32%
love history [14]

ANSWER

6.4 hours

EXPLANATION

if it takes 10 hours to get 50%, then it will take less number of hours to get 32%

We use proportion to solve this question.

If less more divides.

The number of hours it will take to get 32% is

=  \frac{32\% \times 10}{50\%}

= 6.4

Hence it will take 6.4 hours to get 32%

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The greatest common factor of 72 and 4 is 4.

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How do you solve this? (#11/#12)
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\text{If}\ x_1,\ \text{and}\ x_2\ \text{are zeros of a polynomial function, then the function}\\\text{has equation}:\\\\f(x)=a(x-x_1)(x-x_2).\\----------------------------\\\\11.\ \text{We have the zeros}\ 3\ \text{and}\ i:\\\\f(x)=(x-3)(x-i)=(x)(x)+(x)(-i)+(-3)(x)+(-3)(-i)\\\\=x^2-xi-3x+3i=\boxed{x^2-(3+i)x+3i}\\\\12.\ \text{We have the zeros}\ -2\ \text{and}\ 2i:\\\\f(x)=(x-(-2))(x-2i)=(x+2)(x-2i)\\\\=x^2-(2i)^2=x^2-2^2i^2=x^2-4(-1)=\boxed{x^2+4}\\\\\text{used}\\\\(a-b)(a+b)=a^2-b^2\\\\i=\sqrt{-1}\to i^2=-1

3 0
3 years ago
Simplify the following<br>a) 5(3a - 45<br>b) 4(a + 2b - 1<br>​
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Step-by-step explanation:

I hope that is useful for you :)

5 0
3 years ago
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