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2 years ago

andy is 5 kilogram less than twice his brother's. together they weigh 100 kilograms what are they weights

Mathematics

2 answers:

Minchanka [31]2 years ago

6 0

Let x be the brother's weight.
Then 2x-5 is Andy's weight.
x+(2x-5)=100
3x-5=100
3x=105

Ksivusya [100]2 years ago

3 0

Andy is 45 kilograms and his brother is 55 kilograms. 55+45=100

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Bad White [126]

B) (1, 5) is your best answer

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3 years ago

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18 cajas de manzanas y peras fueron llevadas a la escuela. Las peras trajeron 210 kg en 6 cajas. ¿Cuántos kilos de manzanas fuer

Katyanochek1 [597]

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504 kilos de manzanas fueron llevados a la escuela.

Step-by-step explanation:

Sean $x$ , $y$ la cantidad de cajas de manzanas y peras, respectivamente. De acuerdo con el enunciado, tenemos el siguiente sistema de ecuaciones:

Total de cajas

$x+y = 18$ (1)

Masa de cada caja de peras

$y\cdot m_{P} = 210$ (2)

$y = 6$ (3)

Masa de caja de manzanas

$m_{M} = m_{P}+7$ (4)

De (2) en (3), tenemos que la masa de cada caja de peras es:

$m_{P} = 35\,kg$

Por (4), encontramos que la masa de cada caja de manzanas es:

$m_{M} = 35\,kg+7\,kg$

$m_{M} = 42\,kg$

Finalmente, de (1) tenemos la cantidad de cajas de manzana:

$x = 18-y$

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La cantidad de kilos de manzanas llevada a la escuela se obtiene al multiplicar la cantidad de cajas de manzana por la masa de cada caja:

$M = (12)\cdot (42\,kg)$

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2 years ago

The sum of three numbers is 123. The second number is 8 more than the first. The third number is 3 times the first. What are the

Aleksandr [31]

Answer:

41 is my geuss

Step-by-step explanation:

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2 years ago

Find the zeros of the polynomial function and state the multiplicity of each.

zheka24 [161]

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the -7 is found there twice, so it has a multiplicity of 2
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2 years ago