3 years ago

Explain why every year must contain at least one Friday the 13th.

Mathematics

1 answer:

Bond [772]3 years ago

8 0

Step-by-step explanation:

God said "let there be light" The people who made the calendar said "Let there be Friday 13th.

You might be interested in

The volume of a right circular cone that has a height of 18.9 ft and a base with a radius of 15.8 ft.

Elden [556K]

The answer is 783.8696

6 0

3 years ago

It is given that y varies inversely as x^2. If x is decreased by 50%, find the percentage change in y.

vova2212 [387]

Answer:

300%

Step-by-step explanation:

Given

$y\ \alpha\ \frac{1}{x^2}$

Required

Find the percentage change in y when x decreased by 50%

First, convert to equation

$y\ = \ \frac{k}{x^2}$

Where k is the constant of proportionality

When x decreased by 50%

$Y = \frac{k}{(x - 0.5x)^2}$

$Y = \frac{k}{(0.5x)^2}$

$Y = \frac{k}{0.25x^2}$

Expand

$Y = \frac{1}{0.25} * \frac{k}{x^2}$

Substitute $\frac{k}{x^2}$ for y

$Y = \frac{1}{0.25} * y$

$Y = 4 * y$

$Y = 4 y$

The percentage change is then calculated as:

$\%Change = \frac{Y - y}{y} * 100\%$

$\%Change = \frac{4y - y}{y} * 100\%$

$\%Change = \frac{3y}{y} * 100\%$

$\%Change = 3 * 100\%$

$\%Change = 300\%$

<em>The percentage in y is 300%</em>

7 0

3 years ago

PLEASE PLEASE HELP ME QUICK!!!!

Greeley [361]

U have a solid line...means there is an equal sign in the problem...so that eliminates 2 of them right away...so A and D are incorrect

it is shaded below the line....this means it is less then...that eliminates option C leaving u with only one answer choice

so ur answer is : B. y is less then or equal to x

3 0

3 years ago

Read 2 more answers

An elliptical cylinder is sliced by a plane, as shown in the figure. Among the four given two-dimensional shapes, which shape is

guapka [62]

Shape 3 because if you look at the shaded figure it is a square like shape i hope it helps!!!

3 0

3 years ago

Read 2 more answers

Please I will give brainliest

atroni [7]

Answer: