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WITCHER [35]
3 years ago
12

Emily studied people in her school and determined that 75 out of 100 people in her grade could roll their tongues. If there are

1,200 people in
her neighborhood, predict how many of them can roll their tongues.
people

PLEASE ANSWER IMMEDIATELY ITS FOR AN IMPORTANT PAPER THATS DUE SOON !
Mathematics
1 answer:
ludmilkaskok [199]3 years ago
3 0

Answer:

I believe the answer is 900.

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Find the second derivative of 2x^3-3y^2=8​
Umnica [9.8K]

Answer:

\frac{d^2y}{dx^2}=\frac{x(2y-x^3)}{y^3}

Step-by-step explanation:

<u>Find the first implicit derivative using implicit differentiation</u>

<u />2x^3-3y^2=8\\\\6x^2-6y\frac{dy}{dx}=0\\ \\-6y\frac{dy}{dx}=-6x^2\\ \\\frac{dy}{dx}=\frac{x^2}{y}

<u>Use the substitution of dy/dx to find the second derivative (d²y/dx²)</u>

<u />\frac{d^2y}{dx^2}=\frac{(y)(2x)-(x^2)(\frac{dy}{dx})}{y^2}\\ \\\frac{d^2y}{dx^2}=\frac{2xy-(x^2)(\frac{x^2}{y})}{y^2}\\\\\frac{d^2y}{dx^2}=\frac{2xy-\frac{x^4}{y}}{y^2}\\\\\frac{d^2y}{dx^2}=\frac{x(2y-x^3)}{y^3}

5 0
3 years ago
One number is fifty-six more than four times another number. if each number were multiplied by six, their difference would be si
Eva8 [605]
X=56+4y
6x-6y=678

x-y=113
x=113+y

113+y= 56+4y
57=3y
y=19
x=132
4 0
3 years ago
1 point
Anton [14]

Answer:

  C.  350 miles

Step-by-step explanation:

Daphne wants to drive 3/4 of the distance in the first 2 days. So, her mileage per day should be about (3/4)/2 = 3/8 of the total mileage:

  (3/8)(932.4 mi) = 349.65 mi ≈ 350 mi

She should drive about 350 miles on each of the first 2 days.

8 0
3 years ago
Adam and his dad share the cost of the meal in the ratio of 2:3. Adam’s dad pays £52.20. What is the total cost of the meal
Ne4ueva [31]
We have to calculate the total cost of the meal. We know that Adam ( A ) and his dad ( D ) share the cost of the meal in the ratio 2 : 3 and that Adam`s dad pays 52.20 Pounds. So A : D = 2 : 3; A : 52.20 = 2 : 3. Using the cross products, A * 3 = 2 * 52.20; A * 3 = 104.40; A = 104.40 : 3; A = 34.80 Pounds. Finally, A + D = 34.80 + 52.20 = 87.00. Answer: The total cost of the meal is 87 Pounds<span>. </span>
6 0
4 years ago
The Mosteller formula for calculating adult body surface area is Upper B equals StartRoot StartFraction hw Over 3131 EndFraction
Anvisha [2.4K]

Answer:

1,75

Step-by-step explanation:

The Mosteller formula is [tex]M=\sqrt{\frac{(172.72)(63.95)}{3600}} = 1.75[/tex]

We know that height is 68 inches and weight 141 pounds

We must remember that 1 inches = 2.54 cm and 1 pound 0.453 kg

This means 68 inches = 172.72 cm and 141 pounds = 63.95

We substitute on the formula

4 0
3 years ago
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