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creativ13 [48]
3 years ago
8

There is a 10% off sale on laptop computers. If someone saves $35 on a laptop, what was its original cost?

Mathematics
1 answer:
IceJOKER [234]3 years ago
4 0

Answer:

The original cost is $350

Step-by-step explanation:

Let's assume

original cost of computer is x

There is a 10% off sale on laptop computers

So, amount saved is

=\frac{10}{100}x=0.10x

now, we are given

someone saves $35 on a laptop

so, we can set them equal

and then we can solve for x

0.10x=35

we can divide both sides by 0.10

and we get

x=350

So,

The original cost is $350

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Step-by-step explanation:

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C) \ y=\int\ {0.5x+6x^2} \, dx=0.25x^2+2x^3+C;

5 0
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4 people went to a restaurant. And the total bill for all of them is 106.9
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26.725

Step-by-step explanation:

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18 cm distance on map<br> 120 m distance in real life <br> Scale
lubasha [3.4K]

Answer:

1:1500

Step-by-step explanation:

Scale distance = 18cm : 120 m = 18cm : 12000cm

Now, write this in the form of 1:n

18:12000 = 1:1500

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3 years ago
A plane traveled 4575 miles with the wind in 7.5 hours and 4275 miles against the wind in the same amount of time. Find the spee
rosijanka [135]

Answer:

<em>The speed of the plane in still air is 590 mph</em>

<em>The speed of the wind is 20 mph</em>

Step-by-step explanation:

Let's call:

x = Speed of the plane in still air

y = Speed of the wind

The plane traveled d=4575 miles with the wind in t=7.5 h. The speed calculated with this data corresponds to the sum of the speed of the plane and the speed of the wind, thus:

\displaystyle x+y=\frac{4575}{7.5}=610

x + y = 610        [1]

The plane traveled 4275 miles in 7.5 hours against the wind, thus the speed calculated is x - y:

\displaystyle x-y=\frac{4275}{7.5}=570

x - y = 570        [2]

Adding [1] and [2]:

2x = 610 + 570 = 1180

x = 1180 / 2 = 590

From [1]:

y = 610 - 590 = 20

The speed of the plane in still air is 590 mph

The speed of the wind is 20 mph

6 0
3 years ago
the length of the base of an isosceles triangle is x. The length of a leg is 4x-5. The terminator of the triangle is 35. find x.
vodomira [7]

Answer:

x= 5

Step-by-step explanation:

We are given;

  • Base of the triangle as x
  • Length of the leg is 4x-5
  • An isosceles triangle has two equal legs and a base.
  • The perimeter of the triangle is 35 (spelling mistake in the question)

To get the perimeter of a triangle we add the lengths of all sides of the triangle.

Therefore;

x + 4x-5 + 4x-5  = 35

9x - 10 = 35

9x = 45

  x = 5

Thus, the value of x is 5

7 0
3 years ago
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