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3 years ago

Out of 720 students,120 have failed.What percentage of students failed the exam?

Mathematics

2 answers:

Arturiano [62]3 years ago

5 0

Answer:

83.33%

Total no. of students = 720

No. of students who failed = 120

Therefore no. of students passed = 720 120= 600

Therefore pass percentage = 600/720* 100 = 83.33%

Step-by-step explanation:

I hope it will help you...

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#carryonlearning

kondor19780726 [428]3 years ago

4 0

$% = \frac{parts}{whole} * 100%$ Answer:

Step-by-step explanation:

Hi there,

I have given the answer in the images attached below in order , please do check it out.

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A piece of wire 25 m long is cut into two pieces. One piece is bent into a square and the other is bent into an equilateral tria

fomenos

Answer:

Wire used for square is 7.55 m.

Step-by-step explanation:

Let the length of wire cut for square be 'x'.

Given:

Total length of the wire = 25 m

Length of wire for square = 'x'

Length of wire for equilateral triangle = $25-x$

Now, area of square (a) = $x^2$

Area of equilateral triangle (e) is given as:

$e=\frac{\sqrt3}{4}(25-x)^2$

Now, total area (A) is given as:

$A=a+e\\\\A=x^2+\frac{\sqrt3}{4}(25-x)^2$

Now, in order to maximize 'A', the derivative of area with respect to 'x' must be 0.

∴ $\frac{dA}{dx}=0$

$\frac{d}{dx}(x^2+\frac{\sqrt3}{4}(25-x)^2)=0\\\\2x-\frac{\sqrt3}{2}(25-x)=0\\\\2x+\frac{x\sqrt3}{2}=\frac{25\sqrt3}{2}\\\\x(2+\frac{\sqrt3}{2})=\frac{25\sqrt3}{2}\\\\x(4+\sqrt3)=25\sqrt3\\\\x=\frac{25\sqrt3}{4+\sqrt3}=7.55\ m$

Therefore, the length of the wire that is cut for square should be 7.55 m for maximum area.

3 0

3 years ago

The financial planner for a beauty products manufacturer develops the system of equations below to determine how many combs must

Nina [5.8K]

The price of each comb is $0.5, and the total income from selling x plastic combs is y = x/2

<h3>What is an equation?</h3>

An equation is an expression that shows the relationship between two or more number and variables.

The linear equation y = x/2 models the income, in dollars, from selling x plastic combs. Hence:

Price of each comb = (x/2) / x = 0.5

The price of each comb is $0.5, and the total income from selling x plastic combs is y = x/2

Find out more on equation at: brainly.com/question/2972832

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2 years ago

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The can is 12cm high and the diameter is 4cm

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Firstly, find the radius with the formula diameter (d) : 2

8 : 2 = 4 cm

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Your exercise says to use "3" as a value for π

Then V is 192*3 = 576 cm³

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3 years ago

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Kim is playing an online trivia game. She has 25 points and earns 1 point for each correct answer. She will advance to the next

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