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aalyn [17]
3 years ago
12

The ratio of nitrogen to potassium in a sample of soil is 9;12. The sample has 48 units of nitrogen . How much potassium does th

e sample have.
Mathematics
1 answer:
yawa3891 [41]3 years ago
5 0
9/12=48/x
576=9x
x=64
64 units of potassium
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Maria is installing gutters on her rectangular shed that measures 10 ft by 9 ft she has 23 ft of gutter already and need to purc
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Answer:

Maria needs 3 lengths of gutter of finish the shed.

Step-by-step explanation:

We need to calculate the perimeter of the rectangular shed to know how much  5 feet gutter is needed.

The perimeter of the shed is p = 2(l + b) where l = 10ft and b = 9 ft

p = 2(10 + 9) = 2(19) = 38 ft

Now, the perimeter of the shed also equal 23 ft of gutter already installed plus 5x ft gutter where x = number of gutters.

So 23 + 5x = 38

collecting like terms, we have

5x = 38 - 23

5x = 15

dividing through by 5 we have

5x/5 = 15/5

x = 15/5

x = 3

So, Maria needs 3 lengths of gutter of finish the shed.

8 0
3 years ago
Pls show work ASAP <br> Multiplying polynomials
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Answer:

Step-by-step explanation:

1. 6w*2v + 3*6w= 12vw + 18w

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4. -4*v - 4(1)= -4v - 4

5. 2n*6n + 2n + 2*6n + 2= 12n^2 + 14n + 2

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8. 8p(6p) + 8p(2) - 2(6p) - 4 = 48p^2 + 16p - 12p - 4= 48p^2 + 4p - 4

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13. 4p(4p) - 4p - 4p + 1 = 16p^2 - 8p +

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7 0
3 years ago
Day Care Tuition A random sample of 50 four-year-olds attending day care centers provided a yearly tuition average of $3987 and
olasank [31]

Answer:

We have to find the 90% confidence interval for the mean

                 Given sample size  

                        Sample mean  

Population standard deviation  

Here the confidence level is 90% then  

                                                  And  

The 90% confidence interval is  

Here  is the critical value at 0.05

From the tables  

Now the 90% confidence interval is =

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2 years ago
A university's freshman class has 10000 students. 2500 of those students are majoring in Engineering. What percentage of the fre
Musya8 [376]

Answer:

25%

Step-by-step explanation:

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10000/4 = 2500

its 1/4 of the students

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3 years ago
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Can someone help me answer this question ​
lubasha [3.4K]

Answer:

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Step-by-step explanation:

$1 = 0.74 pounds

345 * 0.74 = 253.89

$345 = 253.89 pounds

6 0
2 years ago
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