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Pie
3 years ago
5

Some friends decide to go to the aquarium together. Each person pays $7.50 to get in. They spend a total of $40 for the shark ex

hibit. The total cost is $70. Solve 7.5x+40=70 to find how many people went to the aquarium.
Mathematics
1 answer:
murzikaleks [220]3 years ago
7 0

Answer:

4 people went to the aquarium

Step-by-step explanation:

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Critérios de divisibilidade dos números 2,3,4,5,6,8 e 10
san4es73 [151]

Step-by-step explanation:

Los criterios de divisibilidad nos ayudan a saber de antemano cuándo un número natural es divisible por otro.

Ser divisible significa que cuando dividimos estos números, el resultado será un número natural y el resto será igual a cero.

Presentaremos los criterios de divisibilidad por 2, 3, 4, 5, 6, 7, 8, 9 y 10.

Divisibilidad por 2

Cada número cuyo dígito unitario sea par será divisible por 2, es decir, los números que terminan en 0, 2, 4, 6 y 8.

Ejemplo

El número 438 es divisible por 2 ya que termina en 8, que es un número par.

Divisibilidad por 3

Un número es divisible por 3 cuando la suma de sus dígitos es un número divisible por 3.

Ejemplo

Verifica que los números 65283 y 91277 sean divisibles por 3.

Solución

Sumando los dígitos de los números indicados, tenemos:

6 + 5 + 2 + 8 + 3 = 24

9 + 1 + 2 + 7 + 7 = 26

Dado que 24 es un número divisible por 3 (8. 3 = 24), entonces 65283 es divisible por 3. El número 26 no es divisible por 3, por lo que 91277 tampoco es divisible por 3.

Divisibilidad por 4

Para que un número sea divisible entre 4, sus dos últimos dígitos deben ser 00 o divisibles entre 4.

Ejemplo

¿Cuál de las siguientes opciones tiene un número que no es divisible por 4?

a) 35748

b) 20500

c

) 97235 d) 70832

Solución

Para responder a la pregunta, verifiquemos los dos últimos dígitos de cada opción:

a) 48 es divisible por 4 (12. 4 = 48).

b) 00 es divisible por 4.

c) 35 no es divisible por 4, ya que no hay un número natural que multiplicado por 4 sea igual a 35.

d) 32 es divisible por 4 (8.4 = 32)

Entonces la respuesta es la letra c. El número 97235 no es divisible por 4. S

3 0
2 years ago
A rectangular hat box has a value of 5,184 cubic inches. The box is 2feet Long by 18in wide. What is the hat box’s height?
Hatshy [7]
D would be the correct answer. Post brainliest if this helped plz :)
6 0
2 years ago
EMERGENCY <br> Triangles ABC and DEF are similar. Find the length of the segments EF and DF
Gala2k [10]

Answer:

EF = 1.5. DF = 2.

Step-by-step explanation:

DE is half of AB so EF is half of BC and DF is half of AC.

7 0
2 years ago
Please I really need help on this
Ilya [14]

Answer:

40%

Step-by-step explanation:

She has sold 20 items total.

Refrigerators: 8/20 = 40%

Dishwashers: 1/20 = 5%

Dryers: 11/20 = 55%

So there is a 40% chance she will sell another refrigerator! hope this helps!!

3 0
2 years ago
find the simple interest earned when the principal is $500 at a rate of 10% held in the bank for 8 months
olga nikolaevna [1]

The Simple interest will be "$400".

Given values are:

  • Principle, P = $500
  • Interest rate, R = 10%
  • Time, T = 8 months

As we know,

→ Simple \ interest (SI) = \frac{P\times R\times T}{100}

By substituting the values, we get

→                                  =\frac{500\times 10\times 8}{100}

→                                  =5\times 10\times 8

→                                  = 400 ($)

Thus the above response is correct.  

Learn more about Simple interest here:

brainly.com/question/15469221

3 0
3 years ago
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