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aleksandrvk [35]
3 years ago
8

PLEASE HELP URGENT!!! Answer only 28.

Mathematics
1 answer:
disa [49]3 years ago
4 0

Answer:

-2h -16k

Step-by-step explanation:

-2(h+8k)

Distribute

-2h -2 *8k

-2h   -16k

They failed to distribute the minus sign as well as the 2            

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Suppose that x and y are both differentiable functions of t and are related by the given equation. Use implicit differentiation
stepan [7]

Answer:

Let z = f(x, y) where f(x, y) =0 then the implicit function is

\frac{dy}{dx} =\frac{-δ f/ δ x }{δ f/δ y }

Example:- \frac{dy}{dx}  = \frac{-(y+2x)}{(x+2y)}

Step-by-step explanation:

<u>Partial differentiation</u>:-

  • Let Z = f(x ,y) be a function of two variables x and y. Then

\lim_{x \to 0} \frac{f(x+dx,y)-f(x,y)}{dx}    Exists , is said to be partial derivative or Partial differentiational co-efficient of Z or f(x, y)with respective to x.

It is denoted by δ z / δ x or δ f / δ x

  • Let Z = f(x ,y) be a function of two variables x and y. Then

\lim_{x \to 0} \frac{f(x,y+dy)-f(x,y)}{dy}    Exists , is said to be partial derivative or Partial differentiational co-efficient of Z or f(x, y)with respective to y

It is denoted by δ z / δ y or δ f / δ y

<u>Implicit function</u>:-

Let z = f(x, y) where f(x, y) =0 then the implicit function is

\frac{dy}{dx} =\frac{-δ f/ δ x }{δ f/δ y }

The total differential co-efficient

d z = δ z/δ x +  \frac{dy}{dx} δ z/δ y

<u>Implicit differentiation process</u>

  • differentiate both sides of the equation with respective to 'x'
  • move all d y/dx terms to the left side, and all other terms to the right side
  • factor out d y / dx from the left side
  • Solve for d y/dx , by dividing

Example :  x^2 + x y +y^2 =1

solution:-

differentiate both sides of the equation with respective to 'x'

2x + x \frac{dy}{dx} + y (1) + 2y\frac{dy}{dx} = 0

move all d y/dx terms to the left side, and all other terms to the right side

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

Taking common d y/dx

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

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

7 0
3 years ago
Last weekend, a movie theater sold 250 tickets to a movie. This weekend, the movie thater sold 18% fewer tickets to that same mo
GREYUIT [131]

Answer:

205 tickets

Step-by-step explanation:

You multiply 250 by 0.18 (decimal form of 18%) and u get 45

Then you subtract 45 from 250 and you get 205

4 0
2 years ago
Multiply the binomials: <br><br> (a-2) • (a-8)
umka21 [38]

Answer:

a^2 -10a +16

Step-by-step explanation:

(a-2) • (a-8)

FOIL

first a*a = a^2

outer: a * -8 = -8a

inner: -2 *a = -2a

last: -2 *-8 = 16

Add them together

a^2 -8a -2a+16

Combine like terms

a^2 -10a +16

6 0
3 years ago
Read 2 more answers
HELP PLEASE!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
ddd [48]

Answer:

45,54,63,72,81 for the 5 multiples of 9

63 is the least common multiple of 7 and 9

Step-by-step explanation:

3 0
3 years ago
Helppp thank you!!!!!
7nadin3 [17]

Answer:

D

Step-by-step explanation:

<em>x</em> is greater than 12:

x>12 \text{ or } 12

and <em>x</em> is less than or equal to 3 times the value of y:

12

We can divide everything by 3:

4

7 0
3 years ago
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