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ANTONII [103]
3 years ago
6

In 2009 the life expectancy is about 80 life expectancy gains 5.7 years every decade. From 2009 in how many years would humanity

achieve a life expectancy of 120 years
Mathematics
1 answer:
Dmitry [639]3 years ago
3 0

Answer:

  about 70 years

Step-by-step explanation:

Life expectancy (e) improves by 5.7 years every 10 years, so 5.7/10 = 0.57 years per year. For t years after 2009, it can be modeled by ...

  e = 0.57t +80

We want to find when that is 120:

  120 = 0.57t +80

  40 = 0.57t

  40/0.57 = t ≈ 70.2

About 70 years from 2009, humanity may achieve a life expectancy of 120 years.

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2(x-1)-y=-8 <br> y=2x+8 <br> substitution method
BartSMP [9]

Answer:

No Solution.

Step-by-step explanation:

2(x-1)-y=-8

y=2x+8

----------------

2x-2-(2x+8)=-8

2x-2-2x-8=-8

2x-2x-2-8=-8

0-2-8=-8

-2-8=-8

-10=-8

no solution

3 0
3 years ago
What are the approximate values of the minimum and maximum points of
Katen [24]
To start off, you can divide the right side of the equation by x to get rid of most of the x's so you get the polynomial x^4 - 10x^2 + 9. This means that f(x) = x^4 - 10x^2 + 9x. By factoring the right side of the equation, you get f(x) = (x^2 - 1)(x^2 - 9). I think the minimum value is 1 and the maximum value is 3. 
7 0
3 years ago
nico put some cupcakes i the oven at 8:55 they need to bake or 25 mins what time do they get took out
Gelneren [198K]
Since an hour has 60 minutes you will take away 5 from 25 and put the 5 on 55 to get 9:00 then you add the rest to get 9:20.

Hope this helps. :)
5 0
3 years ago
PLZ HELP ASAP
zubka84 [21]

Here we go.

1) x/5 - 4h = 35

2) {(6-p)/3}+8

3) This is just 1.4k, since the distance you're trying to find is 1.4 times k feet.

You can include a diagram easily enough. Just draw a baseball diamond and two lines, one connecting first and third base and labeled 1.4k, while the other line, connecting home to third, is labeled k.


Hope that helped!

8 0
3 years ago
Huong had $23 to spend on six notebooks. After buying them she had $11. How much did each notebook cost?
Nataly [62]
23-11=12
She spent $12 on notebooks, and she bought six notebooks.
12/6=2

Each notebook costed $2.
8 0
3 years ago
Read 2 more answers
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