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3 years ago

En las matematicas para que concepto se usan las letras?

Mathematics

1 answer:

julia-pushkina [17]3 years ago

8 0

Answer:

En matemáticas, las letras son utilizadas en las ecuaciones, para representar a través de ellas valores no conocidos que deben ser dilucidados por quien realiza la ecuación. Las letras más utilizadas con este propósito son las letras X e Y.

Así, por ejemplo, se da una suma con un valor numérico y un valor faltante denominado X, con un resultado también numérico, con lo cual el valor de X surgirá del resultado de la ecuación planteada. Por ejemplo:

8 + X = 10

X = 10 - 8

X = 2

8 + 2 = 10

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4 years ago

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3 years ago

Josie spent 4/7 of ten money in her purse on some books, and the rest of the money on 18 markers. Each marker cost $1.20. How mu

NeTakaya

Let's assume money in Josie's purse to begin with as 'x'

There are 18 markers

Each marker cost $1.20

so, we can find total cost of markers

Total cost of markers = ( total number of markers)*(price of each marker)

so, we can plug value

Total cost of markers is

$=18\times 1.20$

$=21.6$ $

now, we are given

Josie spent 4/7 of the money in her purse on some books

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so, rest money is

$=x-\frac{4}{7} x$

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and this rest money is total cost of markers

so, we can set them equal and then we can solve for x

$\frac{3}{7} x=21.6$

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$x=50.4$

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3 years ago

A rectangle on a coordinate plane has vertices at (7, 5), (–7, 5), (–7, –2), and (7, –2). What is the perimeter of the rectangle

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Number of students who chose Bulldog is 4*x.
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7x = 273 -> x=273/7=39.
Answer is 2*x=78.

3) The answer is B).
A and C aren't answers because they start with positive and end with negative numbers and D isn't answer because -6 1/4 is greater than -6,53.

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3 years ago