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ArbitrLikvidat [17]
3 years ago
5

Suppose the length and width of the rectangle are doubled. What effect would this have on the area? Justify your answer

Mathematics
1 answer:
Marta_Voda [28]3 years ago
6 0

Answer:

the area would be 4 times

Step-by-step explanation:

4* 17 = 68

8* 34 = 272

272/68= 4

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Finding Derivatives Implicity In Exercise,Find dy/dx implicity.<br> x2e - x + 2y2 - xy = 0
Klio2033 [76]

Answer:

the question is incomplete, the complete question is

"Finding Derivatives Implicity In Exercise,Find dy/dx implicity . x^{2}e^{-x}+2y^{2}-xy"

Answer : \frac{dy}{dx}=\frac{y-(2-x)xe^{-x}}{(4y-x)}

Step-by-step explanation:

From the expression  x^{2}e^{-x}+2y^{2}-xy" y is define as an implicit function of x, hence we differentiate each term of the equation with respect to x.

we arrive at

\frac{d}{dx}(x^{2}e^{-x )+\frac{d}{dx} (2y^{2})-\frac{d}{dx}xy=0\\

for the expression \frac{d}{dx}(x^{2}e^{-x}) we differentiate using the product rule, also since y^2 is a function of y which itself is a function of x, we have

(2xe^{-x}-x^{2}e^{-x})+4y\frac{dy}{dx}-x\frac{dy}{dx} -y=0\\\\(2-x)xe^{-x}+(4y-x)\frac{dy}{dx}-y=0 \\.

if we make dy/dx  subject of formula we arrive at

(4y-x)\frac{dy}{dx}=y-(2-x)xe^{-x}\\\frac{dy}{dx}=\frac{y-(2-x)xe^{-x}}{(4y-x)}

5 0
3 years ago
What's the expression for subtract 20 divided into fourths from 55 divided into fifths
alexira [117]
The expression is 55/5 - 20/4
11-5
the answer is 6
5 0
2 years ago
If a^2+b^2= 4 and ab = 5, what is the value of<br> (a+b)^2?<br> A. 10<br> B. 12<br> C. 14<br> D. 16
wlad13 [49]

Answer:

14

Step-by-step explanation:

(a+b)^2

(a+b)(a+b)

FOIL

a^2 + ab+ab + b^2

Combine like terms

a^2 +2ab + b^2

Rearranging

a^2+b^2 +2ab

We know a^2+b^2 = 4  and ab= 5

4 + 2(5)

4+10

14

5 0
3 years ago
Read 2 more answers
Need help please! Not sure how to do this
Kisachek [45]
This problem is fairly simple if you know the exponential equation, you start with y=78(.17)^x. the you put 10=78(.17)^x, then you solve for x 

10=78(.17)^x 
-78
-68=.17^x 
divide .17 then you have your answer!!
3 0
3 years ago
A car travels 36 miles in 1 hour and 30 minutes, what is its average speed
andrew11 [14]
The average speed is 0.4 miles per minute
8 0
2 years ago
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