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Aleksandr [31]
3 years ago
7

Ricky earned $102 in 8 hours

Mathematics
1 answer:
Mariulka [41]3 years ago
4 0
102/8 = 12.75

Your answer would be $12.75

Hope this helps!
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X^2+1=0<br> What are the roots of this equation?<br> Thanks!
Hitman42 [59]
X² + 1 = 0

=> (x+1)² - 2x = 0

=> x+1 = √(2x)

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Now take y=√x

So, the equation changes to

y² - y√2 + 1 = 0

By quadratic formula, we get:-

y = [√2 ± √(2–4)]/2

or √x = (√2 ± i√2)/2 or (1 ± i)/√2 [by cancelling the √2 in numerator and denominator and ‘i' is a imaginary number with value √(-1)]

or x = [(1 ± i)²]/2

So roots are [(1+i)²]/2 and [(1 - i)²]/2

Thus we got two roots but in complex plane. If you put this values in the formula for formation of quadratic equation, that is x²+(a+b)x - ab where a and b are roots of the equation, you will get the equation

x² + 1 = 0 back again
So it’s x=1 or x=-1

5 0
3 years ago
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One way of solving systems of linear equations is by adding a multiple of one equation to the other. the multiplier for one equa
elena-s [515]
We want to use elimination to solve
y = 0                     (1)
x + y = 40             (2)

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3 0
3 years ago
1/7 divided by 3<br> Is it 1/3 or 1/2 im so confuse
larisa86 [58]
<h3><u>given</u><u>:</u></h3>

<u>\frac{1}{7}   \div 3</u>

<h3><u>solution</u><u>:</u></h3>

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<u>\frac{1 \times 1}{7 \times 3}</u>

<u>=  \frac{1}{21}</u>

5 0
2 years ago
Help with these math exercises, please!
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