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agasfer [191]
2 years ago
10

Need help asap!!!!!!!!!

Mathematics
1 answer:
agasfer [191]2 years ago
8 0

Answer:

4

Step-by-step explanation:

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A scientist mixes water (containing no salt) with a solution that contains 35% salt. She wants to obtain 105 ounces of a mixture
Naya [18.7K]

Answer:

60 oz of water to add

45 oz of 35% salt solution should be used

Step-by-step explanation:

Let x = amt no. ounces in the first solution

and  105 - x = amt no. of ounces in the second solution

Ist solution contains 0% salt

2nd solution contains .35(105 - x) salt

.15(105= amt of salt in mix

So.

amt of salt in 1st solution + amt of salt in 2nd solution = amt of salt in the mix

0 + .35(105 - x) = .15(105)

Let's get rid of the fractions by multipying thru the equation by 100

35(105 - x) = 15(105)

3675 - 35x = 1575

-35x = -2100

x = 60 oz of water to add

105 - 60 = 45 oz of 35% salt solution should be used

7 0
2 years ago
Marietta is selling cheeses for the holiday fund raiser. Monday she sole 7/9 of the boxes of cheeses. Tuesday she restocked her
uysha [10]
The second day, she sold more.

We know 7/9 is about 0.777777777778

And 0.78 < 0.85 

So the second day she sold more. 
3 0
3 years ago
Read 2 more answers
You need to arrange 10 of your favorite books on a small shelf. How many different ways can you arrange the books, assyming that
tensa zangetsu [6.8K]

Answer:

You can arrange the books 3,628,800 different ways.

Step-by-step explanation:

You can imagine that the shelf has 10 "slots" where you can place a book. Each slot can take 1 of the 10 books. However, after you have placed 1 book, there are only 9 possible books to place. After 2 have been placed, there are only 8 possible.

Going left-to-right, the first slot has 10 available books.

Total combinations: 10

The 2nd slot has 9 available books.

Total combinations: 10 * 9

The 3rd slot has 8 available books.

Total combinations: 10 * 9 * 8

This continues for all 10 slots.

Eventually, for slot 10, there is only 1 book possible.

Total combinations: 10 * 9 * 8 * 7 * 6 * 5 * 4 * 3 * 2 * 1

Multiply all numbers between 10 and 1 with each other is also known as "10 factorial" or "10!"

Thus, the total number of combinations is:

10! = 10*9*8*7*6*5*4*3*2*1 = 3628800

Answer: You can arrange the books 3,628,800 different ways.

8 0
3 years ago
Which equation represents the line that passes through the point (1, 5) and has a slope of -2?
irakobra [83]

Answer:

y=-2x+7

Step-by-step explanation:

y-y1=m(x-x1)

y-5=-2(x-1)

y=-2x+2+5

y=-2x+7

8 0
3 years ago
Randy said that the number 0.03 has a value 10 times greater than 0.003.Is he correct ?Explain your answer.
ziro4ka [17]
Yes. When you multiply a decimal number by 10, the decimal point moves one point to the right. Example:

0.05*10 = 0.5

This means that 0.003*10=0.03 since the decimal point moved one place to the right.
3 0
3 years ago
Read 2 more answers
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