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3 years ago

15

Lily buys a sweater that is on sale for $42, which is 75% of the original price of the sweater. What was the original price of t

he sweater?

2 answers:

lara [203]3 years ago

3 0

The answer is $73.50.

Arte-miy333 [17]3 years ago

3 0

$56 was the original price

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anzhelika [568]

Step-by-step explanation:

they need to add up to -56

and multiply to 180

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3 years ago

doug got 8 out of 10 questions correct on his math quiz. If each question was worth the same number of points, and the test was

melamori03 [73]

Answer:

Each answer correct is 5 points so Doug got 40 points.

Step-by-step explanation:

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2 years ago

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Anvisha [2.4K]

Here is how to work 2, 3 , and 4.

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3 years ago

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

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

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

$=8$

so, total alcohol solution is

$=8+0.6x$

now, we can find total solutions

total solutions is

$=x+40$

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

4 0

3 years ago

Please Solve for x.

Novosadov [1.4K]

Answer:

A: x = 20

Step-by-step explanation:

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3 years ago

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