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wel
2 years ago
13

:14=15:21lololololol i have to put 20 characters lolol

Mathematics
1 answer:
Lana71 [14]2 years ago
8 0

Answer:

10

Step-by-step explanation:

x:14=15:21

14/21 = 2/3

Multiply each term by 2/3

15 *2/3 :21*2/3

10:14

The missing number is 10

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What is the value of the expression 83?
jarptica [38.1K]

Answer:

83+11_

Step-by-step explanation:

5 0
3 years ago
Find dy/dx by implicit differentiation. y cos x = 5x2 + 3y2
lbvjy [14]
Step 1:
Start by putting \frac{d}{dx} in front of each term

\frac{d}{dx}[y cos x]= \frac{d}{dx}[5x^2]+ \frac{d}{dx}[ 3y^2]
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Step 2:

Deal with the terms in 'x' and the constant terms
\frac{d}{dx}[ycosx]= 10x+ \frac{d}{dx} [3y^2]
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Step 3:

Use the chain rule for the terms in 'y'
\frac{d}{dx}[ycosx]=10x+6y \frac{dy}{dx}
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Step 4:

Use the product rule on the term in 'x' and 'y'
(y) \frac{d}{dx} cos x+(cos x) \frac{d}{dx}y =10x+6y \frac{dy}{dx}

y(-siny)+(cosx) \frac{dy}{dx} =10x+6y \frac{dy}{dx}
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Step 5:

Rearrange to make \frac{dy}{dx} the subject
-y sin(y)+cos(x) \frac{dy}{dx} =10x+6y \frac{dy}{dx}
cos(x)  \frac{dy}{dx}-6y \frac{dy}{dx}=10x+y sin(y)
[cos(x) - 6y]  \frac{dy}{dx}=10x + y sin(y)
\frac{dy}{dx}= \frac{10x+ysin(y)}{cos(x)-6y} ⇒ Final Answer


5 0
3 years ago
Convert 77 degrees in Fahrenheit to Celsius temperature using the formula . 72°C 61°C 35°C 25°C
faust18 [17]

Answer:

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Step-by-step explanation:

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77 - 32 = 45 x 5 = 225/9 = 25º

8 0
2 years ago
How to rename the number 24 ten thousands?
kifflom [539]
Its 24,000  if the number goes to ten thousand's place..

5 0
3 years ago
Rewrite 14/15 and 9/10
erik [133]
I think I know what your asking so the answer would be 27/30 and 28/30 
6 0
3 years ago
Read 2 more answers
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