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3 years ago

Queston

Mathematics

2 answers:

Verdich [7]3 years ago

6 0

Answer:

$94

Step-by-step explanation:

An item is on sale $75

After a 20% discount was removed

The original amount of the item before discount was $94

Therefore 20%, of $94 is $75

Maru [420]3 years ago

3 0

Answer:

$60

Step-by-step explanation:

0.80 x 75 = $60

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The escalator rises 25 degrees from the ground and a vertical distance of 42 ft. How much horizontal distance does the escalator

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67 ft (rounded is 70 ft)

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4 years ago

How much is 2/3 × 5

djverab [1.8K]

Answer:

Answer:3.33 

Answer:3.33 Step-by-step explanation:

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3 years ago

Read 2 more answers

Could someone explain this to me?

Ilya [14]

This is a simple differentiation problem. Let's start by taking the derivative of both sides (with respect to x):
$5y^4\frac{dy}{dx}+6y^2x+6x^2y\frac{dy}{dx}+20x^3 = 0$

Simplify:
$\frac{dy}{dx} (5y^4+6x^2y) + 6y^2x+20x^3 = 0$

Solve for dy/dx:
$\frac{dy}{dx} = \frac{-6y^2x-20x^3}{5y^4+6x^2y}$

Now, plug in the given points:
$\frac{dy}{dx} = \frac{-6(2)^2(-1)-20(-1)^3}{5(2)^4+6(-1)^2(2)} = \frac{24+20}{80+12}$

Further simplification gives:
$\frac{dy}{dx}|_{(2,-1)} =\frac{44}{92} = \frac{11}{23}$

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4 years ago

Simply (cotθ-cscθ)^2

DIA [1.3K]

Answer:

[(cosθ-1)^2]/(sinθ)^2

Step-by-step explanation:

(cotθ-cscθ)^2

(cotθ)^2-2cscθcotθ+(cscθ)^2

(cosθ/sinθ)^2-2(cosθ/(sinθ)^2) +1/(sinθ)^2

All have same denominator, (sinθ)2, add/subtract

((cosθ)^2-2cosθ+1)/(sinθ)^2

Factor the top

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