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3 years ago

In athletic competition, the record jump in the pole vault was 6.75 Meters. An athlete set a

Mathematics

1 answer:

sdas [7]3 years ago

3 0

Answer:

Step-by-step explanation:

Givens

The old record is 6.75 meters.
The new record is 8.5 meters.

If 6.75 meters represents 100%, which percentage would represents 8.5 meters? (we use the rule of three).

$8.5 \times \frac{100 \%}{6.75 } =125.93 \%$

Then, we subtract 125.96% - 100% = 25.96%

Therefore, the percentage between the two records is 25.96%

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The mean of three numbers is 12 . Two of three numbers are 9 and 14 . What is the third numbers ?

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13 is the correct answer

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3 years ago

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What is the absolute value of the complex number -4-√2

Zepler [3.9K]

|a+bi| = √(a² + b²)

-4-√2 i -> take a = -4 and b = -√2

|-4-√2 i| = √[ (-4)² + (-√2)² ]
 = √[ 16 + 2 ]
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3 years ago

Mandy is selling pancakes and waffles at her diner. On Monday she sold a total of 300 pancakes and waffles. If she charges $3 pe

elena-s [515]

Answer:

Mandy sold 250 pancakes and 50 waffles.

Step-by-step explanation:

From the information given, you can say that the sum of pancakes and waffles is equal to 300:

x+y=300

Also, the statement indicates that she charges $3 per pancake, $1 per waffle, and made a total of $800 and you can express this as:

3x+y=800

You have the following equations:

x+y=300 (1)

3x+y=800 (2), where:

x is the number of pancakes she sold

y is the number of waffles she sold

Now, you can solve for x in (1):

x=300-y (3)

Then, you can replace (3) in (2):

3(300-y)+y=800

900-3y+y=800

900-800=2y

100=2y

y=100/2

y=50

Finally, you can replace the value of y in (3) to find x:

x=300-50

x=250

According to this, the answer is that Mandy sold 250 pancakes and 50 waffles.

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3 years ago

Which of the statements below best describes direct variation?

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4 years ago

if each dimension of a unit cube is increased by 1. what is the ratio between the surface area of the new cube to that of the or

nexus9112 [7]

Answer:

4:1 or 4/1

Step-by-step explanation:

Original surface area: Each side is 1 * 1 = 1 and there are 6 sides, so 1 * 6 = 6.

New surface area: Each side is 2*2 = 4, and there are 6 sides, so 4 * 6 = 24

The ratio would be 24:6, or 4:1. As a fraction, this would be 4/1

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3 years ago

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