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IRISSAK [1]
3 years ago
8

3 dogs plus 5 cats cost $365. 5 dogs plus 3 cats cost $491. What is the cost of one cat?

Mathematics
2 answers:
cestrela7 [59]3 years ago
3 0
$22 because if you substitute dogs cost for 85 then solve cats are 22 each
pashok25 [27]3 years ago
3 0

Answer:

Solution given;

let dogs be d and cats be c.

according to the question

3 d +5 c =$365........[1]

5d+3c=$491.............[2]

By doing elimination method

multiplying equation 1 by 5 and equation 2 by 3 and subtracting

we get

15d+25c=$365*5

15d+9c=$491*3

- - -

____________

;16c=$352

c=\frac{352}{16}=$22

<u>the cost of one </u><u>cat</u><u> </u><u>is</u><u> </u><u>$</u><u>2</u><u>2</u><u>.</u>

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Answer:

22

Step-by-step explanation:

double negative is a plus sign

13--9=22

4 0
3 years ago
Read 2 more answers
5x + 6y = 18 and 18x -15y =36
stira [4]
5x+6y=18

5x=18-6y

x=(18-6y)/5

Use that in the other equation
18(18-6y)/5 - 15y = 36

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28.8=36.6y
.7868=y

Now put that number in for y on the first equation

5x+6(.78) = 18
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4 0
4 years ago
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Your family needs a set of 4 tires. which of the following deals would you prefer. explain. 1. Buy 3 get one free,
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4 0
3 years ago
.Un recipiente cilíndrico de 5cm de radio y 10cm de altura se llena de agua. Si la masa del recipiente lleno es de 2kg, ¿cuál es
Lera25 [3.4K]

Answer:

La masa del recipiente vacío es 1,2146 kg.

Step-by-step explanation:

La densidad se define como la propiedad que tiene la materia, ya sean sólidos, líquidos o gases, para comprimirse en un espacio determinado. En otras palabras, la densidad es una magnitud que permite medir la cantidad de masa que hay en determinado volumen de una sustancia. Entonces, la expresión para el cálculo de la densidad es el cociente entre la masa de un cuerpo y el volumen que ocupa:

densidad= \frac{masa}{volumen}

Entonces la masa puede ser expresada como:

masa= densidad*volumen

En este caso:

  • densidad del agua= 1000 \frac{kg}{m^{3} }
  • volumen del recipiente cilíndrico= π*radio²*altura= π*(5 cm)²* 10 cm= π*(0,05 m)²*0,1 m= 7,854*10⁻⁴ m³

Reemplazando:

masa= 1000 \frac{kg}{m^{3} } * 7,854*10⁻⁴ m³

masa=0.7854 kg

Si la masa del recipiente lleno es de 2 kg, entonces se le resta la masa de agua calculada:

2 kg - 0,7854 kg= 1,2146 kg

Entonces,<u><em> la masa del recipiente vacío es 1,2146 kg.</em></u>

<u><em> </em></u>

<u><em></em></u>

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Answer:

Step-by-step explanation:

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8 0
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