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3 years ago

Help please asap!!!

Mathematics

1 answer:

lys-0071 [83]3 years ago

3 0

Answer:

Step-by-step explanation:

12+12+16+14+15

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Make u the subject formula<br>Please help<br><br>X=4uy/M

dangina [55]

Answer:

$\frac{XM}{4y}=u$

Step-by-step explanation:

First, multiply both sides by M.

X M = 4uy

Now, divide both sides by 4y.

$\frac{XM}{4y} =\frac{4uy}{4y}$

Therefore,

$\frac{XM}{4y}=u$

6 0

2 years ago

FIND THE NUMBER AND WRITE AN EQUATION FOR THE WORD PROBLEM: Brenda runs 4 miles every day. Write an equation to find the number

erastovalidia [21]

Brenda runs 20 miles in 5 days. 4 x 5 = 20.

4 0

3 years ago

<img src="https://tex.z-dn.net/?f=%5Cbegin%7Bequation%7D%5Ctext%20%7B%20Question%3A%20If%20%7D%20%5Cln%20%28x%2By%29%3D4%20%5Cti

Art [367]

I think you meant to say

$\ln(x+y) = 4xy$

and not "4 times y" on the right side (which would lead to a complex value for y when x = 0). Note that when x = 0, the equation reduces to ln(y) = 0, so that y = 1.

Implicitly differentiating both sides with respect to x, taking y = y(x), and solving for dy/dx gives

$\dfrac{1+\frac{dy}{dx}}{x+y} = 4y + 4x\dfrac{dy}{dx}$

$\implies \dfrac{dy}{dx} = \dfrac{4xy+4y^2-1}{1-4x^2-4xy}$

Note that when x = 0 and y = 1, we have dy/dx = 3.

Differentiate both sides again with respect to x :

$\dfrac{d^2y}{dx^2} = \dfrac{(1-4x^2-4xy)\left(4y+4x\frac{dy}{dx}+8y\frac{dy}{dx}\right)-(4xy+4y^2-1)\left(-8x-4y-4x\frac{dy}{dx}\right)}{(1-4x^2-4xy)^2}$

No need to simplify; just plug in x = 0, y = 1, and dy/dx = 3 to get

$\dfrac{d^2y}{dx^2} \bigg|_{x=0} = \boxed{40}$

8 0

2 years ago

What type of problems can always be solved using the law of cosines or sines?

laila [671]

Anytime you have a triangle (right triangles are preferred) where at least 2 angle measures and 1 side is known. Or, at least two sides and 1 angle measure.

OR..... 3 sides or three angles are known. So, sines or cosines could be used at almost anytime to find the sides and angles of a triangle!

4 0

3 years ago

To determine the price of servicing a car, a

Serggg [28]

Answer:

Hey there!

We can write this equation, where x is the hourly rate and y is the fixed fee.

4x+y=270

7x+y=420

4x+y=270

-7x-y=-420

-3x=-150

x=50

4(50)+y=270

200+y=270

y=70.

The fixed fee is G. $70.

Let me know if this helps :)

7 0

4 years ago

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