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mars1129 [50]
3 years ago
9

An ‘A' train leaves a subway station every 12 minutes. An ‘E' train leaves every 9minutes. If both trains just left the station

on parallel tracks, when will both leave the station together again? A. In 108 minutes B. In 36 minutes C. In 72 minutes D. In 24 minutes
Mathematics
1 answer:
frutty [35]3 years ago
8 0
The answer is B.
The smallest multiple (least common denominator) that both 9 and 12 share is 36.
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Hey I’m struggling with number 13 so please show your work. Thx
Dafna11 [192]

Answer:

\frac{5}{12}

Step-by-step explanation:

Because \frac{3}{5} is being multiplied by S, we can divide \frac{3}{5} from both sides of the equation. This will give us:

\frac{1}{4}÷\frac{3}{5}

But, that looks a bit hectic. Instead of dividing, you can multiply by the reciprocal (which is essentially how to divide fractions). So, instead of \frac{1}{4}÷\frac{3}{5}, you get:

\frac{1}{4}×\frac{5}{3}

When multiplying fractions, remember you can just multiply straight across-- numerator x numerator, then denominator x denominator.

By doing that, you get the fraction \frac{5}{12}

\frac{5}{12} cannot be simplified any more, so S=\frac{5}{12} is your answer :)

I hope this helps

6 0
3 years ago
40 is what percent of 160?
mash [69]

Answer:

25

Step-by-step explanation:

percentage calculator 40 is what percent of 160=25;)

4 0
3 years ago
Read 2 more answers
Dan drank 7/8 of a bottle of water During basketball practice. He then drank Another 4/8 of a bottle after practice. How much wa
Lina20 [59]

Answer:

In total Dan dranked 11/8 of his bottle or as a mixed number 1 and 3/8 of his bottle.

Step-by-step explanation:

6 0
3 years ago
Please help. really appreciate it ​
Hunter-Best [27]
The line that is perpendicular to the line on the graph is y=3

5 0
4 years ago
System of equations by substitution<br> how do this?<br> y= x+2<br> y= -4x+7
jekas [21]
Equations are given,
y= x+2
<span>
y= -4x+7

As you can see both the expressions, x+2 and -4x+7 are equal to "y". That means they are equal to each other too.

So let's equal them and solve it.

</span>x+2=-4x+7\\ \\ x+2+4x=7\\ \\ x+4x+2=7\\ \\ 5x+2=7\\ \\ 5x=7-2\\ \\ 5x=5\\ \\ x=\frac { 5 }{ 5 } \\ \\ x=1
<span>
Now we have x's value we will plug it in the first equation to find "y".

</span>x=1\\ \\ y=x+2\\ \\ y=1+2\\ \\ y=3
<span>
(1,3)</span>
8 0
4 years ago
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