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3 years ago

Quarter past 7 , what time is it ?

Mathematics

2 answers:

enot [183]3 years ago

4 0

Given statement is "Quarter past 7".

Using this statement we have to find equivalent time.

We know that word "quarter" means one fouth (1/4) of the complete cycle.

Biggest unit of time in watch is hour so we will take quarter that is one fourth of 1 hour.

There are 60 minutes in an hour.

so one fouth of 60 minutes will be 60/4 or 15 minutes.

Hence "Quarter past 7" basically means 15 minutes more than 7 hours.

So equivalent time can be written as 7:15 or just 7 hours and 15 minutes.

Phoenix [80]3 years ago

3 0

A quarter of an hour is 15 minutes, so a quarter past 7 is 7+15 mins. This gives you:

7:15

Hope this helps and good luck!

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3 years ago

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asambeis [7]

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3 years ago

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kykrilka [37]

By knowing the blood pressure and applying the quadratic formula, the age of a man whose normal blood pressure is 129 mm Hg is 40 years old.

<h3>How to use quadratic equations to determine the age of a man in terms of blood pressure</h3>

In this problem we have a quadratic function that models the blood pressure as a function of age. As the latter is known, we must use the quadratic formula to determine the former:

129 = 0.006 · A² - 0.02 ·A + 120

0.006 · A² - 0.02 · A - 9 = 0

$A = \frac{0.02 \pm \sqrt{0.006^{2}-4\cdot (0.006)\cdot (- 9)}}{2\cdot (0.006)}$

A = 1.667 + 38.733

A = 40

By knowing the blood pressure and applying the quadratic formula, the age of a man whose normal blood pressure is 129 mm Hg is 40 years old.

To learn more on quadratic equations: brainly.com/question/1863222

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2 years ago

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Use the following abbreviations:
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d = day,
h = hour,
min = minute,
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