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4 years ago

Solve 20x = 10 for x. A. x = 1/2 B. x = 1.5 C. x = 2 D. x = 10

Mathematics

2 answers:

alexira [117]4 years ago

5 0

Answer:

A. 1/2

Step-by-step explanation:

20x=10

Divide 20 on both sides of the equation to get x by itself

20x=10

___. __

20. 20

x =1/2

SVETLANKA909090 [29]4 years ago

4 0

Answer:

A) x= 1/2

Step-by-step explanation:

20x= 10 we then divide 10 by 20 to get x= 10/20 or if we simplify x= 1/2. Thus answer choice A) is correct!

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Use the fact that the world population was 2560 million in 1950 and 3040 million in 1960 to model the population of the world in

zimovet [89]

Answer:

The populaton in year 1991 will be of 5178.9 million of people

and the population in year 2020 will be of 8524.60 million of people

Step-by-step explanation:

We measure the time t in years and let t=0 in the year 1950.

We measure the population P(t) in millions of people, then P(0)=2560 and P(10) = 3040.

Since we are assuming that dp/dt=kP, this theorem gives the following.

$P(t) = P(0)e^{kt}= 2560e^{kt}$

$P(10) = 2560 e^{10k} = 3040$

$k=\frac{1}{10} ln (3040/2560) = 0.0171$

The relative growth rate is about 1.7% per year and the model is

$P(t) = 2560e^{0.017185t}$

<em>Year 1991 is equal in our formula to 41 and year 2020 is equal to 70. </em>Replacing,

$P(41) = 2560e^{0.017185(41)}=5178.89$

$P(70) = 2560e^{0.017185(70)}=8524.60$

Therefore the populaton in year 1991 will be of 5178.9 million of people and the population in year 2020 will be of 8524.60 million of people

6 0

3 years ago

Does 4x-28=2x-6 have distributive property

shutvik [7]

No because there are no parentheses, therefore no distributive property

7 0

3 years ago

Make x the subject of m = n + x/p<br>

melomori [17]

The equation will be x = (m - n)/p
Hope it helped!!!

7 0

3 years ago

Read 2 more answers

Nemo and Dory are meeting Crush at the tide pool. Nemo must swim 6 ¾ miles while Dory must swim 4 1/2 miles to reach their desti

gayaneshka [121]

Answer:

1.5 times.

Step-by-step explanation:

6.75 / 4.5 = 1.5.

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3 years ago

Which postulate or theorem proves that these two triangles are congruent?

timofeeve [1]

what was the right answer?

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3 years ago