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3 years ago

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Emily is making lunch from leftover items found in her fridge. She has pasta , soup , or pizza rolls.To drink, she has a choice

of milk, juice or water. What is the probability that Emily chooses soup and juice

1 answer:

yuradex [85]3 years ago

7 0

I’m not really sure check another scholar

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Let y′′′−9y′′+20y′=0. find all values of r such that y=erx satisfies the differential equation. if there is more than one correc

DerKrebs [107]

we are given

differential equation as

$y'''-9y''+20y'=0$

we are given

$y=e^{rx}$

Firstly, we will find y' , y'' and y'''

those are first , second and third derivative

First derivative is

$y'=re^{rx}$

Second derivative is

$y''=r*re^{rx}$

$y''=r^2e^{rx}$

Third derivative is

$y'''=r^2*re^{rx}$

$y'''=r^3e^{rx}$

now, we can plug these values into differential equation

and we get

$r^3 e^{rx}-9r^2 e^{rx}+20re^{rx}=0$

now, we can factor out common terms

$e^{rx}(r^3 -9r^2 +20r)=0$

we can move that term on right side

$(r^3 -9r^2 +20r)=0$

now, we can factor out

$r(r^2 -9r +20)=0$

$r(r-5)(r-4)=0$

now, we can set them equal

$r=0$

$r-5=0$

$r=5$

$r-4=0$

$r=4$

so, we will get

$r=0,4,5$ ...............Answer

4 0

3 years ago

Solve for x. solve for x. solve forx.

Veronika [31]

X = 7
hope this helps

8 0

3 years ago

Read 2 more answers

Can someone help me please i don’t understand it i really need too finish it by tonight

guajiro [1.7K]

Don't mind me, I just need points haha

6 0

3 years ago

I need help with this question plsss

olga55 [171]

Answer: maybe its 6

Step-by-step explanation:

i think its 6 because it has +3 so maybe adding 3+3

7 0

3 years ago

snow_tiger [21]

Answer:

A (first picture)

Step-by-step explanation:

Based on the picture, the lines are both perpendicular and the red line splits AB into two equal parts (bisects it), so it must represent the perpendicular bisector of AB.

5 0

2 years ago