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3 years ago

11

Evaluation problem please help

1 answer:

Darya [45]3 years ago

7 0

Ok so what you want to do is multiply 2 tines 4 which is 8 then multiply 723 8 times into the calculator or just press the button next to the button on the left 8 times ok then do that again for 723^5 power so whatever product you get for the both of them multiply them then divide whatever product you get on to top to the bottom oops sorry that is the long way so basically 4 times 2 is 8 now that plus 5 = 13 so now on the top half we have 723^13 and on the bottom it is the same thing so divide your answer is 1

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Step-by-step explanation:

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3 years ago

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Illusion [34]

Answer:

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2 years ago

What is the sum of 20x^2-10x-30

ivann1987 [24]

Answer:

The sum of the roots is 0.5

Step-by-step explanation:

<u><em>The correct question is</em></u>

What is the sum of the roots of 20x^2-10x-30

we know that

In a quadratic equation of the form

$ax^{2} +bx+c=0$

The sum of the roots is equal to

$-\frac{b} {a}$

in this problem we have

$20x^{2} -10x-30=0$

so

$a=20\\b=-10\\c=-30$

substitute

$-\frac{(-10)} {20}=0.5$

<u><em>Verify</em></u>

Find the roots of the quadratic equation

The formula to solve a quadratic equation is equal to

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

$a=20\\b=-10\\c=-30$

substitute

$x=\frac{-(-10)\pm\sqrt{-10^{2}-4(20)(-30)}} {2(20)}$

$x=\frac{10\pm\sqrt{2,500}} {40}$

$x=\frac{10\pm50} {40}$

$x=\frac{10+50} {40}=1.5$

$x=\frac{10-50} {40}=-1$

The roots are x=-1 and x=1.5

The sum of the roots are

$-1+1.5=0.5$ ----> is ok

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Answer:

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Step-by-step explanation:

1000/20 = 50

. 50 minutes will take to fill a litre

6 0

2 years ago

Read 2 more answers