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2 years ago

Solve this system of equations, then determine what y equals.

Mathematics

2 answers:

Vsevolod [243]2 years ago

8 0

2+2=4 and 4+4=8 and 8+8=16

MArishka [77]2 years ago

7 0

$x+5y = 7~~~....(i)\\\\\\2x+4y = -4~~~.....(ii)\\\\\\\text{Multiply equation (i) by 2,}\\\\\\2x+10y = 14~~~.....(iii)\\\\\\(iii) - (ii):\\\\2x+10y-2x-4y = 14-(-4)\\\\\implies 6y = 14+4\\\\\implies 6y = 18\\\\\implies y = \dfrac{18}6\\\\\implies y = 3$

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PLS HELP ASAP... WILL MARK BRAINLIEST!!!!

Karolina [17]

Answer:

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2 years ago

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xenn [34]

Answer:

The speed is still water is $v = \frac{d}{h} - c$ .

Step-by-step explanation:

Dimentionally speaking, speed is distance divided by time. Since, the person is travelling downstream, absolute speed is equal to the sum of current speed and speed of the person regarding current. Both components are constant. That is:

$c + v = \frac{d}{h}$

Where:

$c$ - Current speed, measured in miles per hour.

$v$ - Speed of the person regarding current, measured in miles per hour.

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Speed in still water occurs when current speed is zero. Then, such variable is obtained after subtracting current speed on both sides of the expression. Hence:

$v = \frac{d}{h} - c$

The speed is still water is $v = \frac{d}{h} - c$ .

4 0

2 years ago

Divide. Round to the nearest tenth? 2.1/1.488

Keith_Richards [23]

2.1/1.488
=1.41129

Rounded to the nearest tenth is, 1.4.

I hope this helped! ;)

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2 years ago

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How do you simplify(n!)^2/(n+1)!(n-1)!

ANTONII [103]

We haven n! = (n-1)! x n and (n+1)! = n! x (n + 1);
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Finally, [n! x (n-1)! x n] / [n! x (n + 1) x (n-1)!] = (n+1)/n;

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2 years ago

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Hitman42 [59]

What's the question thoo

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