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Inessa [10]
3 years ago
5

5x-y=13 X+8y=19 Solve by the elimination method

Mathematics
1 answer:
Elina [12.6K]3 years ago
6 0

Answer:

x=3, y=2

Step-by-step explanation:

To solve by elimination method, multiply one of the equation by a constant such that when you subtract one equation from the other, you are left with one term only.

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I need help with my math
mrs_skeptik [129]

Answer:

42

Step-by-step explanation:

3 0
3 years ago
Assume the exponential growth model ​A(t)equals=Upper A 0 e Superscript ktA0ekt and a world population of 5.95.9 billion in 2006
Whitepunk [10]

Answer:

1.4% is the maximum acceptable annual rate of​ growth such that the population must stay below 24 billion during the next 100​ years.

Step-by-step explanation:

We are given the following in the question:

The exponential growth model ​is given by:

A(t) = A_0e^{kt}

where k is the growth rate, t is time in years and A_0 is constant.

The world population is 5.9 billion in 2006.

Thus, t = 0 for 2006

A_0 = 5.9\text{ billions}

We have to find the maximum acceptable annual rate of​ growth such that the population must stay below 24 billion during the next 100​ years.

Putting these values in the growth model, we have,

24 = 5.9e^{100k}\\\\k = \dfrac{1}{100}\ln \bigg(\dfrac{24}{5.9}\bigg)\\\\k = 0.01403\\k = 0.01403\times 100\% = 1.4\%

1.4% is the maximum acceptable annual rate of​ growth such that the population must stay below 24 billion during the next 100​ years.

8 0
3 years ago
HELP WITH THIS MATH ANSWER QUESTIONS 1-4 URGENT HELP!!!!!!!!!
Margarita [4]
1.) 9 cm
2.) 5 cm
3.) 10 in
4.) 4 in
3 0
4 years ago
Pls help 25h²- 16t² factorise it​
noname [10]

Answer:

(5h-4t)(5h+4t)

Step-by-step explanation:

25h² - 16t²

adding  and subtracting 20ht from it        (√25 and √16 = 5x4 = 20):

25h² + 20ht - 20ht -16t²

factor:

(5h-4t)(5h+4t)

8 0
3 years ago
Read 2 more answers
If x = 10 and the area of the rectangle is 120, what is the length of the other side?
sweet [91]

Answer:

12

Step-by-step explanation:

to find area you do length times width. if we have one side we have to find what 120/10 is. that is 12. 10 x 12 is 120.

6 0
3 years ago
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