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son4ous [18]
3 years ago
5

How can you use random samples of populations to make predictions

Mathematics
2 answers:
defon3 years ago
8 0

Answer:

You can use proportions by settling the ratio from the sample equal to the ratio from the population.

Explanation:

For Example is 3 out of 50 phones in a sample are defective, then an estimated 60 out of 1000 phones in a population are defective. this can be found by solving the proportion 3/50=x/1000 where x is the estimated number of defective phones in the population.

Korolek [52]3 years ago
3 0

Answer:

Proportions which would be equal to the ratio from the sample equal to the ratio from the population.

Step-by-step explanation:

I find that Proportions are the easiest way.

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Need some help! Please be specific.
Gala2k [10]

Answer: 210 advanced tickets were sold. 130 same day tickets were sold.

Step-by-step explanation:

x= advanced tickets y=same day tickets

2x+3y=810 this equation represents the money

x+y=340 this equation represents the total number of tickets

x+y=340

<u>-x     -x</u>

y=-340-x             2x+3(340-x)=810               210+y=340

                           2x+1020-3x=810        <u>       -210     -210  </u>    

                           -x+1020=810                       y=130

                              <u>  -1020  -1020</u>

                                 <u>-x</u>=-<u>210</u>

                                 -1     -1

                                  x=210              

                             

3 0
2 years ago
The distance between new York city and los angeles is 4090 kilometers. What is the distance in miles?
spin [16.1K]

Hi!

1 mile = 1.6 km

x miles = 4090 km

________________

x = (4090*1)/1,5

x = 2556,25 miles

Hope this helps!

3 0
4 years ago
Read 2 more answers
The ratio of boys to girls in a class room is 5 to 7. If there are 30 boys then how many girls are there
Brums [2.3K]

Answer:

The ratio of boys to girls to 5:7

Let the number of boys be 5x

Let the number of girls be 7x

5x = 30

x = 6

Now just plug in 6 for the x in 7x

and number of girls 7 x 6 = 42

4 0
3 years ago
Read 2 more answers
A triangle has a hypotenuse of 2.9ft and a leg of 2.6ft. Find the middle-sized angle.
deff fn [24]

Answer:

2.5

Step-by-step explanation:


3 0
3 years ago
Please help 10 points What side is the HYPOTENUSE? Which side is opposite of angle H? Which side is adjacent to angle H?
musickatia [10]
HU is the hypotenuse!
- IU is the opposite side of angle H
- and i'm pretty sure HI is the adjacent side to angle H!
-the hypotenuse is always the longest side and will be the opposite side of the right triangle. so angle i is the 90 degree angle, so the opposite side is HU which is also the longest!
- angle H is marked and you can see the opposite side of it is IU which is one of the legs of this triangle.
- adjacent just means like next to or beside so the side HI is next to the angle H which is also a leg of this triangle.
i hope this helps!!
5 0
3 years ago
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