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Morgarella [4.7K]
3 years ago
14

Value walks 2 3/5 miles each day.BI'll runsure 10 miles oncell every 4 days.In 4 days, who covers the greater distance

Mathematics
2 answers:
anyanavicka [17]3 years ago
4 0
The answer is the one that runs 10 miles once every 4 days
myrzilka [38]3 years ago
4 0
Yeah I agree Bill covers the greater distance.
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The sum of the digits of a two-digit number is 13. If 27 is added to the number, the digits will be interchanged. Find the numbe
Lesechka [4]

Hello from MrBillDoesMath!

Answer:

58


Discussion:

Suppose the 2-digit number is "ab". That is, 10a + b.

Sum of digits = 13  =>  a + b = 13   (*)

Digits reversed if 27 added to number  => (10a + b) + 27 = 10b + a  (**)

(**) =

(10a + b) + 27 = 10b + a            => subtract 10b, then a, from both sides

9a -9b = -27                              => divide both sides by 9

a - b = -3

From (*),  a+ b = 13 so  

(a-b) + ( a+b) = -3 + 13  =>

2a = 10 =>

a = 5

As  a +b = 13, 5 + b = 13 => b = 8

Hence the number "ab" is 58


Thank you,

MrB

8 0
3 years ago
An oil spill spreads 25 meters every 1/6 hour. What is the area spill after 2 hours?
Scrat [10]
Since it’s 25 m ever 1/6 hour, it’s 150 m every hour, so it’s 300 m in two hours
7 0
4 years ago
Divide a 8 foot sandwich into pieces that are 3/4 of a foot long. How many 3/4 foot pieces are there?
Vinvika [58]

The answer is not a whole number, so I'm not sure if I am 100% right.

The answer I got was 10.66666667 Pieces. Of course you wouldn't type that many 6's, just as many as it asks for. lol

8 0
3 years ago
un hotel tiene habitaciones dobles y sencillas. dispone en total de 50 habitaciones y 87 camas ¿cuántas habitaciones tiene cada
Alex777 [14]

Answer:

En el hotel hay 13 habitaciones sencillas y 37 habitaciones dobles.

Step-by-step explanation:

Un sistema de ecuaciones lineales es un conjunto de dos o más ecuaciones de primer grado, en el cual se relacionan dos o más incógnitas.

Resolver un sistema de ecuaciones consiste en encontrar el valor de cada incógnita para que se cumplan todas las ecuaciones del sistema.

En este caso, las variables que se definen son:

  • x: habitaciones simples
  • y: habitaciones dobles

Entonces, el hotel dispone en total de 50 habitaciones, por lo que se plantea la ecuación:

x + y= 50

El hotel dispone de 87 camas. La cantidad de camas por habitación puede ser expresada mediante:

x + 2*y= 87

Entonces el sistema de ecuaciones a resolver es:

\left \{ {{x+y=50} \atop {x+2*y=87}} \right.

El método de sustitución consiste en despejar o aislar una de las incógnitas, por ejemplo x , y sustituir su expresión en la otra ecuación. De este modo, obtienes una ecuación de primer grado con la otra incógnita,  y . Una vez resuelta, calculas el valor de  x  sustituyendo el valor de  y ya conocido.

En este caso, despejando x de la primer ecuación:

x= 50 -y

y reemplazando en la segunda ecuación obtienes:

50 -y + 2*y=87

-y + 2*y=87 -50

y= 37

Reemplazando en la expresión x= 50 -y obtienes:

x= 50 -37= 50-37

x= 13

Recordando que x representa la cantidad de habitaciones sencillas e y la cantidad de habitaciones dobles, <u><em>en el hotel hay 13 habitaciones sencillas y 37 habitaciones dobles.</em></u>

3 0
3 years ago
I really need help on this one
CaHeK987 [17]
He has the same as well 6.5
3 0
3 years ago
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