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3 years ago

Could someone please answer my few questions? That'd be great! I'll give 20 points!!!

1 answer:

4 0

Y=3.6x is direct variation. The constant is 3.6
8y=2x is the same as y=0.25x. It is direct variation, and the constant is 0.25

1. Assuming "dinners made" is on the y-axis, DV is y=2x. The constant is 2

2. This is not direct variation, and therefore does not have a constant of variation

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Find dy/dx for 4 - xy = y^3

storchak [24]

Answer:

$\frac{dy}{dx}=-\frac{y}{3y^2+x}$

Step-by-step explanation:

4-xy=y^3

dy/dx=?

$\frac{d(4-xy)}{dx}=\frac{d(y^3)}{dx}\\ \frac{d(4)}{dx}-\frac{d(xy)}{dx}=3y^{3-1}\frac{dy}{dx}\\ 0-(\frac{dx}{dx}y+x\frac{dy}{dx})=3y^2\frac{dy}{dx}\\ -(1y+x\frac{dy}{dx})=3y^2\frac{dy}{dx}\\ -(y+x\frac{dy}{dx})=3y^2\frac{dy}{dx}\\ -y-x\frac{dy}{dx}=3y^2\frac{dy}{dx}$

Solving for dy/dx: Addind x dy/dx both sides of the equation:

$-y-x\frac{dy}{dx}+x\frac{dy}{dx}=3y^2\frac{dy}{dx}+x\frac{dy}{dx} \\ -y=3y^2\frac{dy}{dx}+x\frac{dy}{dx}$

Common factor dy/dx on the right side of the equation:

$-y=(3y^2+x)\frac{dy}{dx}$

Dividing both sides of the equation by 3y^2+x:

$\frac{-y}{3y^2+x}=\frac{(3y^2+x)}{3y^2+x}\frac{dy}{dx}\\ -\frac{y}{3y^2+x}=\frac{dy}{dx}\\ \frac{dy}{dx}=-\frac{y}{3y^2+x}$

7 0

3 years ago

Alvin has a prism-like water tank whose base area is 0.90.90, point, 9 square meters and height is 0.60.60, point, 6 meters. He

Dominik [7]

Answer:

2 fishes

Step-by-step explanation:

5 0

3 years ago

Order these from least to greatest: .25, 3/8, 7/12, 5/16, .5

ivann1987 [24]

So before I tell you the answer this is a bit of explanation:)

To make it easier change the fraction into decimals!

3/8 = .375

5/16 =.3125

7/12 = .583

.5 = 0.5

.25 = 0.25

So, according to my calculations I believe it goes like this: 0.25, 0.375, 0.3125, 0.5, .583

Really I am not sure if this is correct but I hope this helps you understand you can order it whatever way you want but make sure you understand the explanation :) have a great day!!

6 0

3 years ago

Fu<br> fufufufufufufufufufufufufufufufufufufuufufufufu

Ivenika [448]

Answer:

Fufufufufufufufufufufufufufufufufufufufufu

Step-by-step explanation:

have a nice weekend...

ヽ(ヅ)ノ

7 0

3 years ago

Read 2 more answers

Jonathons piggy bank contains 20 nickels 30 quarters and 50 one dollar coins. He picks 20 coins from the bank at random

fredd [130]

Answer:

All in all, Jonathan's piggy bank contains 100 coins. Among these coins, only 50 are one-dollar coins. Therefore, the theoretical probability of picking one-dollar coin from the piggy bank is equal to 50/100 or 1/2.

Similarly, from the experiment, 20 coins were picked and among these there are 12 one-dollar coins. The answer to the second question is therefore 12/20 or 3/5.

Step-by-step explanation:

4 0

3 years ago