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2 years ago

Ayuda es urgente ya lalalalalalalalalalal

Mathematics

1 answer:

Crank2 years ago

8 0

Answer:

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For the class of 2013's prom Norman's dress shop sold cheaper dresses for $90 each and more expensive dresses for $140 each. The

Tema [17]

Answer:

Number of cheaper dresses sold is 35

Number of expensive dresses sold is 15

Step-by-step explanation:

Given:

Cost of cheaper dresses = $90

Cost of expensive dresses = $140

Total cost of the dresses = $5250

To Find:

Number of cheaper dress = ?

Number of expensive dress = ?

Solution:

Let

The number of cheaper dresses be x

The number of expensive dresses be y

(Number of cheaper dresses X cost of cheap dress) + (Number of Expensive dresses X cost of expensive dress) = $5250

$x \times90 +y \times 140 = 5250$ = $5250

It is given that the 20 more of the cheaper dresses than the expensive dresses is sold

So,

number of cheaper dress = 20 + number of expensive dress

x = 20 + y---------------------------------------(1)

$(20+y) \times90 +y \times 140 = 5250 = 5250$

$(20 \times 90 +y\times 90) +y \times 140= 5250$

$1800 + 90y+ 140y = 5250$

$1800 + 230y = 5250$

$230y =5250 -1800$

$230y = 3450$

$y = \frac{3450}{230}$

y = 15

Substituting y in (1)

x = 20 +15

x= 35

5 0

3 years ago

Y is directly proportional to X

Zarrin [17]

y = kx

30 = 6k

k = 5

a) y = 5x

y = 5 × 12

b) y = 60

3 0

2 years ago

Consider the following planes. 3x − 2y + z = 1, 2x + y − 3z = 3

prisoha [69]

Solve for any of the variables; for instance, $z$ :

$z=1-3x+2y$

$z=-\dfrac{3-2x-y}3$

Then

$1-3x+2y=-\dfrac{3-2x-y}3\implies11x-5y=6\implies\begin{cases}y=\frac{11x-6}5\\z=1-3x+\frac{22x-12}5\end{cases}$

Let $x=t$ ; then the intersection is given by the vector-valued function

$\vec r(t)=\left(t,\dfrac{11t-6}5,1-3t+\dfrac{22t-12}5\right)$

$\vec r(t)=\left(t,\dfrac{11t-6}5,\dfrac{7t-7}5\right)$

3 0

2 years ago

A scientist begins an experiment with a culture of 5 bacteria cells. Every hour, the number of bacteria cells triples. Which equ

olga2289 [7]

Answer:

y = 5 * (3^x)

Step-by-step explanation:A scientist begins an experiment with a culture of 5 bacteria cells.

Every hour, the number of bacteria cells triples.

Which equation can be used to represent the number of bacteria cells, y, as it relates to time in hours, x?

I think it would be y = 5 * (3^x)

7 0

2 years ago

The population of Springdale increased by 20% in ten years. The population now is 24,000 people. What was the population ten yea

Dahasolnce [82]

120000 is your answer because if you go to a calculator and type in 24000 divided by 20% then it will give you 120000.

5 0

3 years ago

Ayuda es urgente ya lalalalalalalalalalal​

Ayuda es urgente ya lalalalalalalalalalal