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3 years ago

Number 2 please it so hard need help please

SAT

1 answer:

navik [9.2K]3 years ago

8 0

Okay so Nancy wrote hers in expanded form is a method of representing a number through an addition statement by totaling the values of its digits.

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Un camión traslada 12 vehículos. Algunos son autos y otros son camionetas. Cada auto tiene una masa de 2 toneladas y cada camion

bagirrra123 [75]

Encontrando y resolviendo un sistema de ecuaciones, veremos que hay 9 camionetas y 3 autos.

Sabemos que hay 12 vehículos en el camión.

Definamos:

a = número de autos
c = número de camionetas.

tal que a + c = 12

La masa total será:

a*2 ton + c*3 ton

Y sabemos que el camión lleva 33 toneladas, entonces tenemos:

a*2 ton + c*3 ton = 33 ton

Así encontramos el sistema de ecuaciones:

a + c = 12

a*2 ton + c*3 ton = 33 ton

Para resolverlo, primero aislamos una de las variables en una de las ecuaciones, aislemos a en la primera:

a = 12 - c

Ahora reemplazamos esto en la otra:

(12 - c)*2 ton + c*3 ton = 33 ton

24 ton + c*1 ton = 33 ton

c*1 ton = 9 ton.

c = 9

Es decir, hay 9 camionetas.

Entonces los 3 vehículos restantes son autos.

Hay 9 camionetas y 3 autos.

Sí quieres aprender más, puedes leer:

brainly.com/question/17174746

6 0

3 years ago

In what ways does the belief in witches influence both the settingan

DaniilM [7]

Answer:

yes

Explanation:

i need youuuuu

3 0

3 years ago

Which of the following is a tip for the passage-based reading questions in the critical-reading section of the PSAT? (APEX)

devlian [24]

It would be A I had that question

7 0

3 years ago

each front tire on a particular type of vehicle is supposed to be filled to a pressure of 26 psi. suppose the actual air pressur

Vladimir79 [104]

Quick tv xD tubuh tu kg r ga eh j

7 0

3 years ago

A 0.1 kg block of brass is cooled until it releases 56.4 J of heat. If the temperature of the block was 5 K initially, what is i

Zolol [24]

Answer:

3.5 K

Explanation:

When a sample of a substance releases heat energy, its temperature decreases according to the equation:

$Q=mC(T_f-T_i)$

where

Q is the heat energy released

m is the mass of the substance

C is the specific heat capacity

$T_i$ is the initial temperature

$T_f$ is the final temperature

For the block of brass in this problem, we have:

m = 0.1 kg is the mass

Q = -56.4 J is the heat energy released (negative since it is released)

C = 380 J/kg K is the specific heat capacity of brass

$T_i=5 K$ is the initial temperature

Solving for $T_f$ , we find the final temperature:

$T_f=T_i + \frac{Q}{mC}=5+\frac{-56.4}{(0.1)(380)}=3.5 K$

5 0

3 years ago