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svp [43]
2 years ago
10

Elena va de compras con 400 euros se gasta 3/5 de esa cantidad ¿ cuanto le queda?​​

Mathematics
2 answers:
dexar [7]2 years ago
8 0
240 euros

Explicación:
Ymorist [56]2 years ago
8 0

Planteamos ecuación sabiendo que:

===> Elena solo tiene 400 euros.

===> gasto el 3/5 de dicha cantidad.

Podemos multiplicar los números y restar el resultado entre el número de euros en este caso 400.

Entonces podemos realizamos operaciones :

\:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  { \sf \Rightarrow400 ×  \dfrac{3}{5}  = 240}

Obtenido el resultado Podemos realizar la resta:

\:  \:  \:  \:  \:  \:  \bold{ \Rightarrow400 - 240 = 160.}

\:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \bf{ \red {Respuesta:}}

A Elena le quedan 160 euros.

Espero que te sirva, salu2!!!!

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nadya68 [22]

Answer:

After 7 hours Tevin will catch Enrique

Step-by-step explanation:

We have given speed of Enrique is 20 mph

Tevin left traveling after 2 hours of Enrique

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When Tevin catches  Enrique will cover same distance

Let  Enrique is traveling for t hours

Then Tevin will travel for t-2 hours

We know that distance = speed × time

So 20\times t=28\times (t-2)

20t=28t-56

8t=56

t = 7 hours

So after 7 hours Tevin will catch Enrique

4 0
4 years ago
A bag contains white marbles and yellow marbles, 24 in total. The number of white marbles is 9 less than 2 times the number of y
Zinaida [17]

There are 13 white marbles in the bag.

Step-by-step explanation:

Given,

Total number of marbles = 24

Let,

x represent the number of white marbles.

y represent the number of yellow marbles.

According to given statement;

x+y=24      Eqn 1

x = 2y-9    Eqn 2

Putting value of x from Eqn 2 in Eqn 1

(2y-9)+y=24\\2y-9+y=24\\3y=24+9\\3y=33

Dividing both sides by 3

\frac{3y}{3}=\frac{33}{3}\\y=11

Putting y=11 in Eqn 2

x=2(11)-9\\x=22-9\\x=13

There are 13 white marbles in the bag.

Keywords: linear equation, substitution method

Learn more about linear equations at:

  • brainly.com/question/9621364
  • brainly.com/question/9539036

#LearnwithBrainly

4 0
4 years ago
Hillary needs to know if the triangle shown is a right triangle. Which equation should she use to help?
Sonja [21]

Answer:

a2+b2=c2

Step-by-step explanation:

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3 years ago
Joshua is planning a 1020-mile driving trip. His car gets an average of 30 mpg, and the cost of gas is about $4.06/gallon. What
dolphi86 [110]
30 miles for a single gallon.
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4 0
4 years ago
Read 2 more answers
A school bus has 25 seats, with 5 rows of 5 seats. 15 students from the first grade and 5 students from the second-grade travel
lina2011 [118]

Answer:

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Step-by-step explanation:

Since you have to place all first-grade students in the first three rows, and nowhere else, we have to make a special calculation for that, then another for the rest of the bus.

These are permutations since the order is important. If we sit John, Paul, Ringo, George and Pete in this order in the first row it's a different way than seating them (in the same order) in the second row for example.

For the 15 first-graders of the first three rows (15 seats), we have 15P15 since all 15 places have to be occupied by all 15 first-graders.

Then we have 10 remaining seats left to be assigned to the 5 second-graders.  That is 10P5.

We then multiply the permutation numbers of those two arrangements to get the total ways:

15P15 * 10P5, answer D.

6 0
3 years ago
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