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3 years ago

Simplify: | 5\6 - 7\2 | - | 5\3 |

Mathematics

1 answer:

alexandr1967 [171]3 years ago

8 0

Answer:53 over 30

Step-by-step explanation:

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Leap years are years in which February has 29 days instead of 28. The device of leap year was invented to keep the calendar in s

goldenfox [79]

Answer:

As you know, a year has around 365 + 1/4 days.

This means that in two years, we have:

365 + 356 + 1/4 + 1/4 = 730 + 1/2

and so on.

adding this up, when we have 4 years we have a full day extra, this is:

1460 + 1

When we divide 1461 by 4, we have 365 with a surpass of 1.

The rule used to keep the calendar in sync with this extra day is adding an extra day to each fourth year.

So each fourth year, we have an extra day in Februray (the Februray 29th), this is called a bisiest year.

The "math rule" used to know if a year is leap or not is:

if a year is not divisible by 4, then it is a common year

else if the year is not divisible by 100 then it is a leap year,

else if the year is not divisible by 400, then it is a common year

if not, the year is a leap year.

Where "year" represents the number of the year.

8 0

3 years ago

Simplify this expression:<br> 16 + 28 ÷ 2 – 6<br> 10 – 4 x 2

goldenfox [79]

Answer:

16+28÷2-6=26

10-4x2=2

Step-by-step explanation:

16+28÷2-6

=16+16-6

=32-6

=26

10-4x2

=10-8

5 0

4 years ago

The manager of a grocery store has taken a random sample of 100 customers. The average length of time it took the customers in t

Irina-Kira [14]

Answer:

The correct option is B) 0.0228

Step-by-step explanation:

Consider the provided information.

The manager of a grocery store has taken a random sample of 100 customers. The average length of time it took the customers in the sample to check out was 3.1 minutes. The population standard deviation is known to be 0.5 minute.

Thus, the value of n = 100, $\bar x=3.1$ and σ = 0.5

We want to test to determine whether or not the mean waiting time of all customers is significantly more than 3 minutes.

The null and alternative hypotheses are,

$H_0:\mu\leq3$ and $H_a:\mu>3$

Compute the test statistic $z=\frac{\bar x-\mu}{\frac{\sigma}{\sqrt{n}}}$

$z=\frac{3.1-3}{\frac{0.5}{\sqrt{100}}}$

$z=\frac{0.1}{0.05}$

$z=2$

By using the table.

P value = P(Z>2) = 0.0228

Hence, the correct option is B) 0.0228

7 0

3 years ago

HELP FAST I'LL MARK YOU BRAINLIEST What is an equation of the line that passes through the point (−2, 3) and is perpendicular to

igomit [66]

Answer: y = -2/3x + 5/3

Step-by-step explanation:

The slope of a perpendicular line is opposite reciprocal --> -2/3
Using point given (-2, 3), find b.
3 = -2(-2/3) + b
3 = 4/3 +b
5/3 = b

5 0

3 years ago

If a bus travels at 48MPH how long will it take to be able to travel 60 miles

GrogVix [38]

It will take 1.25 hours

8 0

3 years ago