3 years ago

I need help on this!!!!! PLEASE!!!!!!

1 answer:

6 0

The perimeter of a shape is when you add up all the sides. I used a calculator to add up all the numbers. The images shows three different forms.

Hope this helps! :)

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3 years ago

The price of an item has been reduced by $8.39 . The new sale price is $51.23. What was the original price?

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How many liters of 60% alcohol solution should be added to 40 liters of a 20% alcohol solution to make a 50% solution?

kolbaska11 [484]

Answer:

120 liters of 60% alcohol solution is needed

Step-by-step explanation:

Let's assume

x liters of 60% alcohol solution is added

so, we get solution as

$=\frac{60}{100}\times x$

$=0.6x$

we are given

40 liters of a 20% alcohol solution is

$=40\times\frac{20}{100}$

$=8$

so, total alcohol solution is

$=8+0.6x$

now, we can find total solutions

total solutions is

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now, it is making 50% solution

so, we get

$\frac{8+0.6x}{x+40} =\frac{50}{100}$

now, we can solve for x

$\left(8+0.6x\right)\cdot \:100=\left(x+40\right)\cdot \:50$

$800+60x=50x+2000$

$10x=1200$

$x=120$

So,

120 liters of 60% alcohol solution is needed

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3 years ago

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3 years ago

Read 2 more answers

I need help on this!!!!! PLEASE!!!!!!​

I need help on this!!!!! PLEASE!!!!!!