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harina [27]
3 years ago
13

In 2009, the life expectancy is about 80 years. Assume that, due to modern advances, life expectancy gains 5.5 years every decad

e. From 2009, in how many years would humanity achieve a life expectancy of 110 years?
Mathematics
1 answer:
Rus_ich [418]3 years ago
4 0

Answer:

60 years

Step-by-step explanation:

2009 -> 80 years

             +5.5

2019 ->  85.5 years

             +5.5

2029  -> 91 years

              +5.5

2039  -> 96.5 years

             +5.5

2049  -> 102 years

              +5.5

2059  -> 107.5 years

              +5.5

2069  -> 113 years

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Pedro and John are going on a field trip with school. Together the boys have $62 to spend on the trip. If Pedro has $15 more tha
Volgvan

Answer:

<h2>John has $23.5</h2>

Step-by-step explanation:

Step one:

we are told that their joint amount is $62

let John's amount be x

and Pedro's amount be y

so that y=x+15

Step two:

The equation to represent the situation is

62=x+(x+15)

open the bracket and solve for x we have

62=x+x+15

62=2x+15

2x=62-15

2x=47

divide both sides by 2

x=47/2

x=23.5

<u>John has $23.5</u>

7 0
3 years ago
In a certain company, there were five candidates running for President. After the vots were tallied, it turned out that Victor,
Alborosie

Considering the situation described, the classification of the elections is given as follows:

  • David came in first place.
  • Greg came in second place.
  • Victor came in third place.
  • Mac came in fourth place.
  • Bill came in fifth place.

<h3>How to find the classification of the elections?</h3>

We take the situation that is described, and build the classification from it. The classification has the following format:

P1 - P2 - P3 - P4 - P5

With P1 being the first placed candidate, P2 being the second placed candidate, and so on until P5 which is the fifth placed candidate.

From the text given in this problem, we have that:

  • Victor finished in third place, and David beat him, hence P3 = Victor, David = P1 or P2.
  • Greg didn't come in first nor in last, hence, considering that Victor is P3, Greg = P2 or P4.
  • Mac didn't win, but he finished higher than Bill, hence, considering that Mac didn't win and that Victor is P3, Mac = P4, Bill = P5.
  • From the bullet points above, we can conclude that David = P1, Greg = P2.

Hence the places of each candidate are given as follows:

  • David came in first place.
  • Greg came in second place.
  • Victor came in third place.
  • Mac came in fourth place.
  • Bill came in fifth place.

A similar problem, in which a situation is interpreted, is given at brainly.com/question/5660603

#SPJ1

7 0
1 year ago
Write the equation of the line in slope-intercept form that passes through (5, –4) and (1, 7).
Over [174]

Answer:

Slope=\frac{11}{-4}

Step-by-step explanation:

4 0
2 years ago
Write the prime factorization of the number 45
Anni [7]
The prime factorization of a number means to factor out the number into multiples of primes.
Let's factor out 45.

45: 1 x 45, 3 x 15, 5 x 9.

Now we have 2 pairs of factors that can be broken down; 3&15, and 5&9.
Let's use 5 and 9.
9 can be broken down into 3 x 3.
We now have 5 x 3 x 3.
This is our factors into primes.

Your prime factorization of 45 is:
3 x 3 x 5.

I hope this helps!
7 0
3 years ago
Read 2 more answers
A camera is selling for $7.50 off the regular price. It was marked down 15%. A student used the equation:
andrezito [222]

Answer:

The student should have divided the discounted amount by the percent. The percent should have been written as a decimal.

Step-by-step explanation:

4 0
3 years ago
Read 2 more answers
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