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4 years ago

Explain on why is 70 not the same as 70%

Mathematics

1 answer:

horsena [70]4 years ago

5 0

70 is the same as 70/1 while 70% is 0.70 or 70/100

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A man has two more nickels than dimes. He has $1.15 in all. How many coins of each kind does he have?

zhannawk [14.2K]

Answer:

Man has 9 Nickels and 7 dimes.

Step-by-step explanation:

Let Number of dimes be x

and Number of Nickels be y

As Per given data he has two more nickels than dimes.

$y= 2+x\\$

As we know that

1 $\$$ = 100 cent

1 nickel is worth = 5 cents = $\frac{5}{100}$ = 0.05 $\$$

1 dime is worth = 10 cents = $\frac{10}{100}$ 0 .1 $\ $$

According to given data he has $\$\ 1.15$ total nickel and dimes

So the equation becomes,

$0.05y+0.1x=1.15$

but $y= 2+x$

$0.05(2+x)+0.1x=1.15\\0.1+0.05x+0.1x=1.15\\0.1+0.15x= 1.15\\0.15x= 1.15-0.1\\0.15x=1.05\\x=\frac{1.05}{0.15}= 7$

Substituting value of x in equation $y = 2+x$ we get

$y= 2+7 =9$

Man has 9 Nickels and 7 dimes.

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4 years ago

WHAT IS TRUE ABOUT THE HEIGHT OF THE RECTANGLE

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Answer:

It is totaly based on the diagram

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3 years ago

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The minute hand of a clock is 6 inches long. how far does the tip of the minute hand move in 15 minutes? how far does it move in

svetoff [14.1K]

This problem involves finding arc lengths. The formula for arc length

is s = r*theta, where r is the radius and theta the central angle.

In 15 minutes, the minute hand sweeps out 1/4 of a circle, or pi/2 radians. This is the central angle. The arc length (how far the minute hand moves in 15 min) is then

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25 minutes is equivalent to a central angle of (25/60)pi rad, or 1.31 radians. What is the associated arc length? Calculate this in the same way as I did for a central angle of pi/2.

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3 years ago

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A cone with a height of 50 meters has a volume of 5400π meters cubed. What is the radius of the cone?

disa [49]

Answer:

r = 18m

Step-by-step explanation:

h = 50 m

Volume of cone = 5400π m³

$\frac{1}{3}\pi r^{2}h=5400\pi \\\\\\\frac{1}{3}\pi r^{2}*50=5400\pi \\\\\\r^{2}=\frac{5400* \pi *3 }{\pi * 50}\\\\\\r^{2}=108*3\\\\r^{2} = 324\\\\\\r=\sqrt{324}\\\\\\$

r = 18 m

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3 years ago