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s344n2d4d5 [400]
3 years ago
11

I need help to solve this proportion

Mathematics
1 answer:
riadik2000 [5.3K]3 years ago
5 0

Answer:

5

Step-by-step explanation:

cross multiply

isolate x

12x=7.5(8)

12x=60

12x/12=60/12

5 is the answer

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The difference of A and B is 3 the sum of A and B is 13 what are the values of a and b
katen-ka-za [31]

Answer:

a = 8 and b = 5

Step-by-step explanation:

A - B = 3

A + B = 13

2A = 16

A = 8

8 - B = 3

B = 5

8 0
2 years ago
Compare the doubling times found with the approximate and exact doubling time formulas. Then use the exact doubling time formula
g100num [7]

The population after 15 years become according to the doubling time is 470000000.

According to the statement

We have given that the nation of 200 million people is growing at a rate of 9% per year.And we have to find that the What will its population be in 15 years.

So, For this purpose, we know that the

The doubling time is the time it takes for a population to double in size/value. It is applied to population growth etc.

So,

Population of nation is 200 million and growing at a rate of 9% per year.

So, 9% of the population is

Percentage population = 9/100*200,000,000

Percentage population = 9* 200,000,0

Percentage population = 1800,000,0.

It means 18000000 number of population is increased per year.

So, The total population increased in 15 years is  15*18000000

The total population increased in 15 years is  270000000.

The population after 15 years is 270000000 + 200,000,000

The population after 15 years is 470000000.

So, The population after 15 years become according to the doubling time is 470000000.

Learn more about doubling time here

brainly.com/question/16407547

#SPJ4

6 0
2 years ago
4. Which has a longer perimeter, a square whose side is 3 metres or a rectangle whose
Yuri [45]

Answer:

The square.

Step-by-step explanation:

perimeter is found by add ing all sides, so 3+3+3+3= 12 while 3+3+2+2= 10

4 0
3 years ago
How do you construct a rectangle? Plz show all steps, it's for FLVS. I really need help
alexira [117]

Step-by-step explanation:

1. Choose arbitrary points A and B in the plane and draw segment AB.

2. Raise a perpendicular m to AB at A.

3. Raise a perpendicular n to AB at B.

4. Choose an arbitrary point C on line n.

5. Drop a perpendicular from point C to line m. Let D be the foot of this perpendicular.

6. Then quadrilateral ABCD is a rectangle.

3 0
3 years ago
Да се намери обемът на правилна четириъгълна призма с лице на околната повърхнина 1600см² и обиколка на основата 12 см​
marissa [1.9K]

Answer:

се намери обемът на правилна четириъгълна призма с лице на околната повърхнина 1600см² и обиколка на основата 12 см

8 0
3 years ago
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