1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Vadim26 [7]
3 years ago
7

1 point) According to one mathematical model, the average life expenctancy for American men born in 1900 was 55 years. Life expe

ctancy has increased by about 0.2 year for each birth year after 1900. If this trend continues, for which birth year will the average life expentancy be 73 years?
a) Write an equation to model the problem. Let t represent the number of years after 1900. For example, t = 12 would represent the year 1912.

b) Solve the equation, then answer the question given above. (Note: You are asked for a year, not a value for t.)
Mathematics
1 answer:
xxMikexx [17]3 years ago
5 0

  a)

Let t represents number of years after 1900

so that means for 1900, value of t is 0

We are given point as (0,55)

and it says that life expectancy increases by 0.2

so that means slope,m=0.2

equation of line is y=mt +b

or y=0.2t +b

now we use point (0,55)

55 =0.2(0) +b

55 =0+b

55= b

so b=55

plug it back into the equation,we get

y=0.2t +55

b)

We are given y=73

so we plug it into the equation we got in part a and solve for t

y=0.2t +55

73 =0.2t +55

73-55 =0.2t

18 =0.2t

18/0.2 =t

90 =t

so t=90

This means the birth year =1900+t =1900+90 =1990


You might be interested in
If Mitzi has two dogs, a puppy that weighs 25 pounds and an adult that weighs 80 pounds, how much will it cost to bathe them bot
Sidana [21]

Answer:

The correct answer is A) $105

Step-by-step explanation:

In this real-world problem,  the cost to groom both dogs is (the puppy) + (the adult dog) = x.

For the first step, y = 40, if x <= 25.

y = 50, if 25 < x < 50.

if x >= 50, then y = 0.50x + 25

So therefore, substitute the puppy + adult dog = x

25 + 80 = x

105 = x

So, the final answer is $105.

It's on Edgen.

4 0
2 years ago
Which shows the solution of the combined inequality? −1≤2−j&lt;−5
vfiekz [6]

Answer: -3 < or = -j < -7

Step-by-step explanation:

-1 < or = 2-j < -5

-1 -2 < or = -j < -5-2

-3 < or = -j < -7

sorry about the sign.

3 0
3 years ago
What adds to 6 and multiplies to 18
kirill115 [55]
That has to be impossible because you can’t get any solution that would possible add to 6
7 0
3 years ago
Read 2 more answers
What are the zeros of the function f (x) = (x-6)(2x+10)
bazaltina [42]

Let f(x)=0.

(x-6)(2x+10)=0

Using the zero-factor property, equate each factor to 0 and then solve for x.

\begin{gathered} x-6=0 \\ x=6 \\  \\ 2x+10=0 \\ 2x=-10 \\ x=-\frac{10}{2} \\ x=-5 \end{gathered}

Thus, the zeros of the given function are 6 and -5.

The zeros are the x-coordinate where the graph touches the x-axis.

Thus, the x-coordinates of where the graph touches the x-axis are -5, and 6.

6 0
10 months ago
Complete the missing value in the solution to the equation:<br> 7 + 5x = =3(y-2)<br> ( ,5)
mafiozo [28]

Answer:

x = 2/5

Step-by-step explanation:

Given:

7 + 5x = 3(y-2)

Rearrange this equation such that x is expressed in terms of y

7 + 5x = 3(y-2)   (expand right side)

7 + 5x = y(3)-2(3)

7 + 5x = 3y-6   (subtract 7 from both sides)

5x = 3y - 6 - 7

5x = 3y - 13

we are given the y-value of the coordinate pair (? , 5)

simply substitute y=5 into the equation above

5x = 3y - 13

5x = 3(5) - 13

5x = 15 - 13

5x = 2   (divide both sides 5)

x = 2/5

7 0
2 years ago
Other questions:
  • A bottlenose dolphin can swim 2.68 meters per second. find the dolphins speed in miles per hour
    15·1 answer
  • How do you solve 2 1/3 ÷ -1 1/3
    15·1 answer
  • If x = 0, then f(0) =
    8·1 answer
  • PLEASE PLEASE PLEASE HELP ME WITH THIS PROBLEM, IT"S 15 POINTS OUT OF 30!!!
    9·1 answer
  • A point is reflected in the x-axis. The reflected point is (2,1). a. What is the original point? And b: what is the distance bet
    14·1 answer
  • A sign says that the price marked on all music equipment is 35% off the original price. You want to buy an electric guitar for t
    13·1 answer
  • Can you please help me with this?​
    13·1 answer
  • Finding angle measures between intersecting lines<br> PLEASE HELP!! ILL GIVE BRAINLY
    12·1 answer
  • Please answer one question asap <br>A(-4,3) B(2,-1) D(-4,-1) C(2,-5)
    11·1 answer
  • What is the length of the unknown leg of the right​ triangle?
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!