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s344n2d4d5 [400]
4 years ago
11

Use substitution method to solve the system of equations. 2x+5x=132y-3x=5​

Mathematics
1 answer:
Nina [5.8K]4 years ago
4 0

Answer:

x=3/7  y=37/7

Step-by-step explanation:

7x=13 x=13/7

2y-3*13/7=5

14y-39=35

14y=74

y=74/14=37/7

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Una heladeria dispone de 20 frutas distintas para elaborar sus malteadas. Si los clientes pueden elegir tres sabores para mezcla
Dahasolnce [82]

Answer:

Existen 6840 permitaciones de malteadas de tres sabores distintos que la heladería puede ofrecer.

Step-by-step explanation:

En este caso, el cliente que adquiere una malteada de tres sabores distintos sigue el siguiente procedimiento:

1) El primer sabor sale de cualquiera de las 20 frutas disponibles.

2) El segundo sabor es distinto al primer sabor, es decir, que sale de las 19 frutas restantes.

3) El tercer sabor es distinto al primer sabor y al segundo sabor, es decir, que sale de las 18 frutas restantes.

Puesto que existe una doble conjunción y que puede importar el orden según la preferencia del cliente, se habla matemáticamente de una permutación, definida como:

n\mathbb{P}k = \frac{n!}{(n-k)!} (1)

Donde:

n - Número de sabores disponibles, adimensional.

k - Número de sabores escogidos, adimensional.

Si tenemos que n = 20 y k = 3, entonces la cantidad de malteadas de tres sabores distintos es:

n\mathbb{P}k = \frac{20!}{(20-3)!}

n\mathbb{P}k = \frac{20!}{17!}

n\mathbb{P}k = 20\cdot 19\cdot 18

n\mathbb{P}k = 6840

Existen 6840 permitaciones de malteadas de tres sabores distintos que la heladería puede ofrecer.

5 0
3 years ago
40 points!!! please tell me how to do it not what the answer is :D
Julli [10]

Answer:

C

Step-by-step explanation:

You first distribute within the parentheses which is -(-z-2). This is going to make everything positive as everything in the parentheses is negative. You should get z+2. Next, you plug that back in. It should be-3z+z+2. You simplify to get -2z+2. Hope this helps!

5 0
3 years ago
Read 2 more answers
A certain​ country's postal service currently uses 55​-digit zip codes in most areas. how many zip codes are possible if there a
VashaNatasha [74]
There would be 100,000 if there are no restrictions on the digits and 90,000 if they cannot use 0 as the first digit.

If there are no restrictions, there are 10 possibilities for each digit:
10(10)(10)(10)(10) = 100,000

If the first digit cannot be 0, there are 9 possibilities for it and 10 possibilities for each of the other 4:
9(10)(10)(10)(10) = 90,000
8 0
3 years ago
What is the value of x
Kisachek [45]

Answer:

x=98

Step-by-step explanation:

Angles in a triangle add up to 180°

180-45-53

=82

Angles in a straight line add up to 180°

180-82

=98

4 0
4 years ago
Read 2 more answers
A college has an acceptance rate of about 21% if 8700 students apply about how many will be accepted
kozerog [31]

Answer:

1827

Step-by-step explanation:

4 0
3 years ago
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