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Taya2010 [7]
3 years ago
9

What is the equation of a line that passes through the points (3, 6) and (8, 4)

Mathematics
1 answer:
Ymorist [56]3 years ago
4 0
First let us find the slope between the two points.

Slope = Change in y / Change in x.

(3, 6) and (8, 4) compares to (x₁, y₁) and (x₂, y₂)

Slope = (y₂ - y₁) / (x₂ - x₁) =  (4 - 6) / (8 - 3) = -2/5 

Slope m = -2/5= -0.4

Using  y = mx + c,   using point (3, 6)

y = -0.4x  + c

6 = -0.4*3 + c

6 = -1.2 + c

6 + 1.2 = c

7.2 = c

c = 7.2

Equation = :       y = -0.4x +c

y = -0.4x + 7.2

y = -4/10  + 72/10

10y = -4x + 72

5y = -2x + 36

Equation =:      5y = -2x + 36

Hope this explains it.
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Answer:

Let's start with part B. if it was originally 10 cm tall and it goes up 0.5 cm. each day, then we know that to go up one cm it needs two days. With that information we can say that 8*2 = 16. So it needs 17 days to go up 8.5 cm which would make it 18.5 cm tall.

Step-by-step explanation:

f(x) = 0.5x + 10

0.5x + 10 = 18.5

0.5x = 18.5 - 10

0.5x = 8.5

x = 8.5/0.5

x = 17 days

6 0
3 years ago
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Step-by-step explanation: You do 60/4 to get the answer.

6 0
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The manager of a store marks up all items by 15%. If x is the original price, what is the new price with the mark up?
Crank

Answer:

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3 years ago
Help?????? Does anyone know the answer to this
Rama09 [41]
I think it’s B, or 0.10x+0.15(50-x)=0.12(50)

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2 years ago
Solve the system of equations by graphing on your own paper. What is the x-coordinate of the solution?
Dovator [93]
Y = x + 7 
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x + 7 = -2x - 11
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The x-coordinate of the solution is -6.

I have attached a graph of the two equations since the question really wanted you to graph it and then find the answer.</span>

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