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Vesna [10]
3 years ago
11

Determine the equation of the line that passes through the given points. (If you have a graphing calculator, you can use the tab

le feature to confirm that the coordinates of both points satisfy your equation.) (3.5, 8.2) and (2, 7.3) a. y = -0.6x - 6.1 b. y = 0.6%-6.1 C. y=-0.6x + 6.1 d. y = 0.6x + 6.1 Please select the best answer from the choices provided A B C D​
Mathematics
2 answers:
svetlana [45]3 years ago
8 0

Answer:

Its c i did it

Step-by-step explanation:

MAXImum [283]3 years ago
8 0

Answer:

I think it is C

Step-by-step explanation:

Hope this helped have an amazing day!

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This is a homeork problem from my class
rosijanka [135]
This is a quadratic function:

f(x)=ax²+bx+c

We have three points:
(0 , 77.6)     
(5 ,  78)
(10 , 78.6)

Then, we make the function wiht these points:
(0 , 77.6)

x=0
f(x)=77.6

a(0)²+b(0)+c=77.6
c=77.6

(5 , 78)
a(5)²+b(5)+77.6=78
25a+5b=78-77.6
25a+5b=0.4         (1)

(10 , 78.6)
a(10)²+b(10)+77.6=78.6
100a+10b=78.6-77.6
100a+10b=1        (2)

With the equations (1) and (2) we have a system of equations:
100a+10b=1
  25a + 5b=0.4

We solve this system of equations by method of elimination.

   100a+10b=1
-4(25a+5b=0.4)
-----------------------------
           -10b=-0.6      ⇒    b=-0.6/-10=0.06

   100a+10b=1
-2(25a+5b=0.4)
----------------------------
     50a =  0.2          ⇒ a=0.2/50=0.004

We have a, b and c:
a=0.004
b=0.06
c=77.6

Therefore, the quadratic funtion is:
f(x)=0.004x²+0.06x+77.6
x=year of the beginning of the interval - 1980

The life expectancy for females born between 1995 and 2000 is when x=1995-1980=15
Therefore:
f(15)=0.004(15)²+0.06(15)+77.6
f(15)=0.004(225)+0.06(15)+77.6
f(15)=79.4

The life expectancy for females born between 2000 and 2005 is when:
x=2000-1980=20
therefore:
f(20)=0.004(20)²+0.06(20)+77.6
f(20)=1.6+1.2+77.6
f(20)=80.4

Answer:
The funtion is:
f(x)=0.004x²+0.06x+77.6
x=year of the beginning of the interval - 1980

The life expectancy for females born between 1995 and 2000 is 79.4 years.
The life expectancy for females born between 2000 and 2005 is 80.4 years.

8 0
3 years ago
Read 2 more answers
an ice machine makes 1 1/2 pounds of ice every 1/2 hour. witch graph shows this proportional relationship?​
Roman55 [17]

Answer:

The 4th one to the Right

Step-by-step explanation:

4 0
3 years ago
Find the selling price of a $30 item after a 40% markup.
tangare [24]
$18. Multiply 30 by 0.4 and subtract that value from 30 to get the price after the percentage taken away.
5 0
3 years ago
Solve for X<br> 6(x + 2) = 66<br> X =
ioda

Answer:

6(x+2)=66

6x+12=66 -12

6x= 54 :6

x=9

Step-by-step explanation:

prove me wrong

4 0
3 years ago
Help me in e plz and then explain
horsena [70]
You have to take a better picture
4 0
3 years ago
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