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Ivenika [448]
3 years ago
9

Please help i'll give brainliest and 5 stars. step by step explanation and answer please

Mathematics
1 answer:
olga55 [171]3 years ago
7 0

Answer:

Solving the equation : y+\frac{y}{a}=b\:if\:a\neq\: -1  for y we get \mathbf{y= \frac{ab}{a+1},\:if\:a\neq -1}

Step-by-step explanation:

We need to solve for y the equation: y+\frac{y}{a}=b\:if\:a\neq\: -1

We need to find value of y

Solving:

y+\frac{y}{a}=b

Taking LCM of a, 1 we get a

\frac{a*y+y}{a}=b\\\frac{ay+y}{a}=b

Multiply both sides by a, a will be cancelled on left side

a(\frac{ay+y}{a})=ab\\ay+y=ab

Taking y common from left side:

y(a+1)=ab

Divide both sides by a+1

\frac{y(a+1)}{a+1}=\frac{ab}{a+1}\\y= \frac{ab}{a+1},\:if\:a\neq -1

So, Solving the equation : y+\frac{y}{a}=b\:if\:a\neq\: -1  for y we get \mathbf{y= \frac{ab}{a+1},\:if\:a\neq -1}

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3 years ago
There are 820 people at a stadium. 65% of them are adults, 20% of them are boys, and the rest are girls. How many girls are ther
jasenka [17]

Answer:

Final answer is 123.

Step-by-step explanation:

Given that there are 820 people at a stadium.

Out of which 65% are adults, 20% of them are boys, and the rest are girls.

Now we need to find about how many girls are there at the stadium?

We know that total percent can be 100%

So percentage of girls in the stadium = (Total %) - (Adults %) - (Boys %)

= 100% - 65% - 20%

= 100% - 85%

= 15%


Then total number of girls at the stadium = 15% of 820

= 0.15 ( 820)

= 123

Hence final answer is 123.


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4 years ago
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