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Olegator [25]
3 years ago
13

Solve the system of equations 2x + 3y = 40 and –2x + 2y = 20.

Mathematics
1 answer:
Flura [38]3 years ago
7 0
2x + 3y = 40
+
-2x + 2y = 20
___________                  Adding both equations

0x + 5y  = 60
____________


5y = 60
y = 60/5 = 12

y = 12.

Since we have gotten y =12, and the only option with that is option D.

So we don't have to solve for x.

<span>The answer is D.</span>
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¿Cuánto recorre aproximadamente una rueda que da 60 vueltas si ésta tiene un radio de 0.20 m?
damaskus [11]

La rueda recorre una distancia de 75.420 metros tras 60 vueltas. (Correct choice: A)

<h3>Cuánta distancia recorre una rueda que da 60 vueltas?</h3>

La rueda se desplaza sobre el suelo mediante un tipo de movimiento conocido como rodadura, en la que la rueda experimenta rotación y traslación, cuyo centro instantáneo de rotación es el punto de contacto entre la rueda y el suelo.

Si no existe deslizamiento de la rueda con respecto al suelo, entonces la distancia recorrida tras una revolución de la rueda (s), en metros, es descrita por la siguiente ecuación:

s = 2π · r         (1)

Donde r es el radio de la rueda, en metros.

Si tenemos que r = 0.20 m, entonces la distancia recorrida es:

s = 2π · (0.20 m)

s ≈ 1.257 m

Asimismo, la distancia recorrida es directamente proporcional al número de revoluciones de la rueda es y la distancia recorrida tras 60 vueltas es determinada por regla de tres simple:

S = 60 vueltas × (1.257 m / 1 vuelta)

S = 75.420 metros

La rueda recorre una distancia de 75.420 metros tras 60 vueltas.

Para aprender más sobre el movimiento de ruedas: brainly.com/question/2862170

#SPJ1

4 0
1 year ago
One number is 10 more than the other. Their product is 299. Which of the following are the representations?
Talja [164]

Answer:

A.

Step-by-step explanation:

the second number is just 10 more than the first

6 0
2 years ago
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A skateboarding club randomly surveyed 200 people who visited the club's website about their favorite skateboard brand. The data
denis-greek [22]

Answer: 36/200 = 18/100 = 18%

Step-by-step explanation:

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3 years ago
I NEED SOMEONE TO SOLVE THESE FOR ME. I NEED THE WHOLE PROBLEM SOLVED NOT JUST THE ANSWER.
dimaraw [331]

Answer:

1. x=11/4

Step-by-step explanation:

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u should x 20 then u will get

12x - 15 = 18

12x = 18 + 15

12x = 33

x =  \frac{33}{12}

x =  \frac{11}{4}

8 0
3 years ago
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Marizza181 [45]

Answer:

the answer is -8

Step-by-step explanation:

x<=-8

the answer is -8

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