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V125BC [204]
2 years ago
12

Bonjour je ne comprend pas cette exercice; si quelqu'un peut m'aider je suis preneuse.

Mathematics
1 answer:
gayaneshka [121]2 years ago
8 0

Answer:

0,24 m

Step-by-step explanation:

La table est un rectanble donc l'angle en  haut à droite est de 90°.

Tu connais donc un angle et le côté opposé à l'angle et tu cherche le côté adjacent.

On sait que tan(â) = \frac{Cote oppose}{Cote adjacent} donc :

tan(40)= \frac{1,27}{x}

\frac{1,27}{tan(40)} = x

donc x ≈ 1,51 m

Le trou du mileu est à \frac{2,54}{2} soit 1,27m du bord.

Donc elle doit taper à 1,51 - 1,27 = 0,24m du trou du milieu.

j'espère avoir été clair.

<h2 />
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One bricklayer can build a wall in 6 hours. Another bricklayer could build the same wall in 4 hours. If they work together, how
Natasha2012 [34]

Answer:

they work together, it will take 2.4 hours to build the wall.

Step-by-step explanation:

One bricklayer can build a wall in 6 hours.

One hour work = \frac{1}{6}

Another bricklayer can build the same wall in 4 hours.

One hour work = \frac{1}{4}

They can together, how long will take them to build the wall.

Let's take "t" the time taken to build the wall.

The sum of their work rate = 1 (To build the wall)

\frac{t}{6} + \frac{t}{4} = 1

Now we have to solve this equation. Take LCD of 6 and 4.

The LCD (least common divisor) of 6 and 4 is 12.

\frac{2t + 3t}{12} = 1

5t = 12*1

5t = 12

Dividing both sides by 5, we get

t = \frac{12}{5}

t = 2.4 hours.

So, they work together, it will take 2.4 hours to build the wall.

6 0
3 years ago
Reduce the following expression: (a-b) / (b-a)
Lynna [10]

Answer:

Simplify   —————

           b - a

1.1    Rewrite   (b-a)    as  (-1) •  (a-b)

Canceling Out :

1.2    Cancel out  (a-b)  which now appears on both sides of the fraction line.

Final result :

 -1

Step-by-step explanation:

4 0
2 years ago
<img src="https://tex.z-dn.net/?f=xy%20%2B%206x%20%2B%203y%20%2B%2018%20%5C%5C%20" id="TexFormula1" title="xy + 6x + 3y + 18 \\
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Consider a cylinder with radius 4 cm and a height of 12 cm. Describe how to calculate the volume of the given cylinder and what
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5 0
3 years ago
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