Explain why it does not matter what letter or symbols is use to find an unknown number

2 answers:

5 0

Because you are trying to find the unknown number right?Well it could stand for anything like how many kittens you could have that as an o as long as you know what you are looking for

sineoko [7]3 years ago

4 0

The letter or symbol expresses an unknown value. There is no value to a letter or symbol.

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The slope field for the differential equation dy/dx=(3y)/(xy+5x) will have vertical segments when

Inessa05 [86]

Answer:

E) x=0 or y=-5

Step-by-step explanation:

The slope field will have vertical segments when dy/dx is undefined, that is, dy/dx is a division by 0.

We have that

dy/dx=(3y)/(xy+5x)

So the slope field will have vertical segments when

$xy + 5x = 0$

$x(y + 5) = 0$

This is when x = 0 or y = -5.

So the correct answer is:

E) x=0 or y=-5

3 0

3 years ago

Simplify the expression -3 + 1/3 x + (-4.5) - 1/5x

WITCHER [35]

Answer:

Step-by-step explanation:

$-3 +\dfrac{1}{3}x - 4.5 -\dfrac{1}{5}x\\\\\\= -3 - 4.5 +\dfrac{1}{3}x - \dfrac{1}{5}x\\\\\\= - 7.5 + \dfrac{1*5}{3*5}x - \dfrac{1*3}{5*3}x\\\\\\= -7.5 +\dfrac{5}{15}x-\dfrac{3}{15}x\\\\\\= -7.5 + \dfrac{5-3}{15}x\\\\\\= -7.5 +\dfrac{2}{15}x$