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3 years ago

MANY PTS BRAINLY FAST PLZ

Mathematics

1 answer:

mart [117]3 years ago

5 0

Answer:

it would be C

Step-by-step explanation:

there are two things you need to look at

E(n) = 0.75n and D(E) = 2E

keep the first part in each equation but remember D(E)

plug in E which as far as we know is E(n)

so we get D(E(n))

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Write and solve an equation to find the value of X

jenyasd209 [6]

3x+x+x=180°

5x=180°
x=36°

3 0

3 years ago

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A hypothetical square grows so that the length of it's diagonals are increasing at a rate of 8 m/min. How fast is the area of th

guapka [62]

Answer:

32 $m^{2}/min$

Step-by-step explanation:

We let the length of the square be l, the diagonal be z and the area be A.

Then by Pythagoras theorem;

$l^{2}+l^{2}=z^{2}\\2l^{2}=z^{2}$

The are of a square of length l is given as;

$A=l^{2}$

Combining these two equations yields;

$z^{2}=2A$

$A=\frac{z^{2} }{2}$

Next, we have been given;

$\frac{dz}{dt}=8$

We are required to find;

$\frac{dA}{dt}$ when z = 4

By chain rule;

$\frac{dA}{dt}=\frac{dA}{dz}*\frac{dz}{dt}$

Differentiating $A=\frac{z^{2} }{2}$ with respect to z yields;

$\frac{dA}{dz}=z$

Therefore,

$\frac{dA}{dt}=\frac{dA}{dz}*\frac{dz}{dt}$ = 8z

When z is 4m the area of the square will be increasing at a rate of;

8m/min * 4m = 32 $m^{2}/min$

5 0

3 years ago

Plssssss help due today

expeople1 [14]

Hmmmmmmmm isn't going to be 6

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3 years ago

Enter the slope-intercept equation of the line that has slope 2 and y-intercept (0, 9).

galben [10]

Hi again Jordan, plug into the equation I just answered. Answer: y = 2x + 9

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3 years ago

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Work out the value of:<br> :<br> a? – 4b + 2c<br> 2<br> when a = 1,b = -3 and c= 2

cricket20 [7]

Answer:

The answer is 17

Step-by-step explanation:

<h3><u>Given</u>;</h3>

a² – 4b + 2c
a = 1, b = (-3) and c = 2

The value of a² – 4b + 2c

Now, Evaluate

a² – 4b + 2c

(1)² – 4(-3) + 2(2)

1 + 12 + 4 = 17

Thus, The value is 17

<u>-TheUnknownScientist 72</u>

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2 years ago