2 years ago

Is it linear or not? 2x+5xy-3=0.

Mathematics

1 answer:

ArbitrLikvidat [17]2 years ago

4 0

The linear equation in slope intercept form: y = mx + b.

We have:

$2x+5xy-3=0\qquad\text{subtract 2x from both sides}\\\\5xy-3=-2x\qquad\text{add 3 to both sides}\\\\5xy=-2x+3\qquad\text{divide both sides by}\ 5x\neq0\\\\y=\dfrac{-2x+3}{5x}$

This is not a linear equation.

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Solve the system of equations -4x+11=15 and x=2y

bixtya [17]

Answer:

x = -, y = - 1/2

Step-by-step explanation:

$- 4x + 11 = 15 \\ - 4x = 18 - 11 \\ - 4x = 4 \\ x = \frac{4}{ - 4} \\ \red{ \bold{ x = - 1}} \\ x = 2y \\ 2y = - 1 \\ \purple{ \bold{ y= - \frac{1}{2} }}$

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3 years ago

How do you divide factorials by lesser factorials again?

meriva

Answer:

(answer in explanation)

Step-by-step explanation:

so, whenever you divide factorials, as soon as you get it to be the same ! on the top and bottom of the fraction, they cancel out like any other fraction would.

So, lets say you're dividing 55! / 50!

55! can also be thought of as 55 x 54 x 53 x 52 x 51 x 50!

$\frac{55*54*53*52*51*50!}{50!}$ = 55 * 54 * 53 * 52 * 51