Answer:
7 years (This answer is to the nearest year)
Step-by-step explanation:
The way you could work this out is by trial and error. 11 % a year means that its population increases by 4400 annually. 40,000 X 1.11^1 gives you the amount it would be after one year (44000). I got the 1.11 because of the percentage (0.11) plus the amount you need to do percentage increase (1). Then all you do is keep on going up till you hit the number you need (80,000) after about 7 years the total would have hit 80,000 and would have actually went past it (83046)
7 because the 3 is the coefficient and the x is the variable. The + is the operator so that leaves you the 7
Answer:
The number that goes in place of the question mark is 2.
Step-by-step explanation:
Let's solve it!
3x² + 12x - 24 = 0
First we can factor 3 out of each term:
x² + 4x - 8 = 0
Now we'll add 12 to both sides to complete the square:
x² + 4x + 4 = 12
And finish it off:
(x + 2)² = 12
So the answer to the question is 2
Bonus:
We can also now solve this for x:
(x + 2)² = 12
x = √12 - 2
x = 2√3 - 2
x ≈ 2 × ±1.732 - 2
x ≈ 1.464, -5.464
Answer:
Se usaron 700 g de queso, quedando 300 g de queso.
Step-by-step explanation:
Si se usó 1/5 más 1/2 de queso, el total usado fue:
Entonces, se usó 7/10 del kg inicial de queso. Sabiendo que:
1 kg ------ 1000 g
7/10 kg ------ x g
Entonces x = 700 g, lo que significa que se usaron 700 g de queso, quedando 300 g de queso.
Este problema se puede resolver utilizando una regla de tres, como se hizo aquí, o mefiante razones, en una equacion lineal.
Espero te haya sido de ayuda!
