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3 years ago

which expressions represents a 20% discount off the price of an item that originally cost D dollars

Mathematics

2 answers:

Charra [1.4K]3 years ago

6 0

Answer:

D - (D/5)

Step-by-step explanation:

Let's imagine that D equals 100 dollars -

Well, we know that to get 20% of an amount, we need to divide the amount by five. So let's do that -

100 / 5 = 20

We now know that 20% of 100 dollars is equal to 20 dollars. We have now finished the first part. On to the second part.

We now need to take away 20% of 100 dollars off of 100 dollars - this is the price of the item after the discount.

100 - 20 = 80 dollars.

We now fit in D instead of 100 dollars -

D - (D/5)

Andreyy893 years ago

6 0

Pretty sure it’s d sorry if I’m to late haha

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In parallelogram DEFG, DH equals X +3, HF equals 3Y, GH equals 2X -5 and HE equals 5Y plus to find the values of X and Y

daser333 [38]

The values of X and Y are 30 and 11 respectively

<h3>How to determine the values of X and Y?</h3>

The figure that represents the complete question is added as an attachment

The given parameters are:

DH = X +3

HF = 3Y

GH = 2X -5

HE = 5Y

From the attached parallelogram, we have:

DH = HF

GH = HE

Substitute the known values in the above equation

X + 3 = 3Y

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Make X the subject in X + 3 = 3Y

X = 3Y - 3

Substitute X = 3Y - 3 in 2X - 5 = 5Y

2(3Y - 3) - 5 = 5Y

Expand

6Y - 6 - 5 = 5Y

Evaluate the like terms

Y = 11

Substitute Y = 11 in X = 3Y - 3

X = 3*11 - 3

Evaluate

X = 30

Hence, the values of X and Y are 30 and 11 respectively

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1 year ago

What is the height of a triangle that has an area of 60 yards^2 and a base of a length of 12 yards?

zmey [24]

For a triangle:
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3 years ago

If the graph of the function f defined by

hoa [83]

Answer:

g(x) = 3x^2 + 3.

Step-by-step explanation:

f(x) = 3x^2 - 5.

First, the x-intercepts have to be calculated to determine the line of symmetry of f(x). For that, set f(x) = 0. Therefore:

3x^2 - 5 = 0.

x^2 = 5/3

x = 1.29 and x = -1.29. The midpoint of these two x-coordinates will be the line of symmetry, which is x = 0.

Therefore, if the graph is translated vertically upwards, it will move up the y-axis by the given amount. In this question, the amount is 8. Simply add 8 in f(x) to obtain g(x). Therefore:

g(x) = f(x) + 8.

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Therefore, g(x) = 3x^2 + 3!!!

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3 years ago

Rocío trabaja en una peluquería, le pagan $50 por corte realizado, adicionalmente recibe $25 al día. Si el día miércoles recibió

skad [1K]

Usando conceptos de funciones lineales, se encuentra que hizo 5 cortes.

----------------

Una funcion lineale tiene el seguiente formato:

$y(x) = ax + b$

En que:

a eres lá inclinacion, o sea, lo que es pago por cada corte.
b eres el intercepto, o sea, lo pagamiento fixo por día.

----------------

Pagan $50 por corte realizado, o sea, $a = 50$ .
$25 fixo al día, o sea, $b = 25$

Entonces, la funcion de su recibimiento y, como funcion de su numero de cortes x, es da por:

$y(x) = 25 + 50x$

----------------

Recibió $275, o sea, $y(x) = 275$

Entonces, el numero de cortes es:

$y(x) = 25 + 50x$

$25 + 50x = 275$

$50x = 250$

$x = \frac{250}{50}$

$x = 5$

Realizó 5 cortes.

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which expressions represents a 20% discount off the price of an item that originally cost D dollars ​

which expressions represents a 20% discount off the price of an item that originally cost D dollars