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ryzh [129]
3 years ago
15

What is the ratio of 15 to 21

Mathematics
2 answers:
Step2247 [10]3 years ago
4 0

Answer:

Ratio: 15:9

hope this helps :)



kari74 [83]3 years ago
3 0
Answer:

The ration is 3:7
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3050÷ 75 with remainder​
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122/3 or 40.666667

Step-by-step explanation:

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One estimate of the population of the world on January 1, 2005, is
inn [45]

Answer:

8,566,379,470 people

Step-by-step explanation:

Let's start simple.  In order to find the population increase on January 1, 2006, we need to multiply 6,486,915,022 by 1.4% and add it to 6,486,915,022.

  1. 6,486,915,022*1.4% = 90,816,810.308
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Note that the above two steps gives the same answer as 6,486,915,022*1.014.

So we need to do this for each year.  20 years pass between 1/1/2005 and 1/1/2025.  

We need to do 6,486,915,022*1.014*1.014*1.014... 20 times.

This is equivalent to 6,486,915,022*1.014^{20}.

Multiplying it out gives us 8566379470.2 = 8,566,379,470 people.

4 0
3 years ago
17+36=z-37 what is z
sp2606 [1]

Answer:

The correct answer is 90

Step-by-step explanation:

17 + 36= z- 37   ADD 17 AND 36

53= z-37        BRING 37 OVER TO 53 AND ADD

z = 90           FINAL ANSWER

8 0
2 years ago
Without drawing the graphs, find the points of intersection of the lines: a 7x+4y=23 and 8x–10y=19
emmainna [20.7K]

Answer:

(3,0.5)

Step-by-step explanation:

The given system has equations:

7x + 4y = 23 \\ 8x - 10y = 19

Let us multiply the second equation by 4 and the first equation by 10.

70x + 40y = 230 \\ 32x - 40y = 76

We add both new equations to get:

102x = 306 \\ x =  \frac{306}{102}  = 3

Put x=3 into the first equation and solve for y.

7(3) + 4y = 23 \\ 21 + 4y = 23 \\ 4y = 23 - 21 \\ 4y = 2 \\  y =  \frac{1}{2}

The point of intersection is the solution to the system of equation which is (3,0.5)

8 0
3 years ago
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