3 years ago

Which way is better?

Mathematics

1 answer:

Liono4ka [1.6K]3 years ago

3 0

Answer:

the best way is to follow the law, sales tax is not subject to discount by the seller.

Step-by-step explanation:

both ways result in the same outcome:

improper way, discount after tax

$50+$5(tax)=$55, after discount $55-$11(20%)=$44

proper way, discount before tax

$50-$10(20%)=$40+$4(tax)=$44

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What is the perimeter of rhombus WXYZ? units 12 units units 20 units

timama [110]

Let O be the intersection of the vertical line through ZX, and the horizontal line through YW.

The coordinates of this point are clearly (5, 2) as it is at the same x-coordinate as X and Z, and y-coordinate as Y and W.

So, YZO is a right triangle. By the Pythagorean theorem:

$ZY= \sqrt{{YO}^2+{OZ}^2}= \sqrt{2^2+3^2}= \sqrt{4+9}= \sqrt{13}$ .

Since all sides of a rhombus are equal, then the perimeter is :

$P(XWZY)=4 \sqrt{13}$ units.

Answer: third choice.