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Luden [163]
3 years ago
11

a machine takes 4.2 hours to make 7 parts. at that rate how many parts can the machine make in 28.8 hours

Mathematics
2 answers:
Karo-lina-s [1.5K]3 years ago
6 0
In 1 hour, a machine could make:
7 \div 4.2
parts
In 28.8 hours, that machine make
7 \div 4.2 \times 28.8 = 4.8
parts
butalik [34]3 years ago
5 0

Answer:

48 Parts

Step-by-step explanation:


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Una persona asegura que su casa tiene forma rectangular y que el perímetro de la misma es de 18 m y que además, su área es de 21
leva [86]

Considerando las fórmulas para el perímetro y el área de un rectángulo, hay que se chega en una <u>eccuación cuadrática sin solución</u>, o sea, las medidas no son posibles y la persona estaba mintiendo.

<h3>¿Cuál es la fórmula para el perímetro y el área de un rectángulo?</h3>

Considerando que las dimensiones son l y w, hay que:

  • El perímetro es: P = 2(l + w).
  • El área es: A = lw.

El <u>perímetro es de 18 m</u>, o sea:

2(l + w) = 18

l + w = 9

l = 9- w.

El <u>área es de 21 m²</u>, o sea:

lw = 21

(9- w)w = 21

-w² + 9 - 21 = 0

w² - 9w + 21 = 0

El discriminante es dado por:

D = 9² - 4 x 1 x 21 = -3.

El discriminante negativo implica que la <u>eccuación cuadrática no tiene solución</u>, o sea, las medidas no son posibles y la persona estaba mintiendo.

Puede-se aprender más a cerca de el perímetro y el área de un rectángulo en brainly.com/question/26475963

#SPJ1

4 0
1 year ago
Graph the linear equation x= - 5​
Grace [21]

Answer:

that would be a vertical line (parallel to the y axis) that passes through -5 on the X axis

Step-by-step explanation:

just a straight line that goes through x = -5. if you're still confused it would also go through the point (-5, -5) a straight vertical line

5 0
2 years ago
Read 2 more answers
X + 3= -x -5<br><br>what's x?​
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Answer:

-4

Step-by-step explanation:

4 0
2 years ago
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Minchanka [31]

Answer:

WHAT IS YOUR QUESTION

Step-by-step explanation:

5 0
2 years ago
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Please solve for h: V=πr²h
earnstyle [38]
Solve for h:V = π h r^2
V = h π r^2 is equivalent to h π r^2 = V:π h r^2 = V
Divide both sides by π r^2:
Answer: h = V/(π r^2)
8 0
3 years ago
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