To find the answer, I would multiply 20 by .34 and get 6.8. I would then add 6.8 to 20 and get 26.8. The cost of the DVD is $26.80.
Hey there!!
How do we find the equation of a line ?
Ans : We take the slope and the y - intercept and get them together.
How do you find slopes?
Ans - In order to find slop, we will need to use the slop formula which is
( y₂ - y₁ ) / ( x₂ - x₁ )
The two points shown in the above question are
( 4 , -8 ) and ( 8 , 5 )
y₂ = 5 , y₁ = -8 and x₂ = 8 , x₁ = 4
Now plug in the values:
( 5 + 8 ) / ( 8 - 5 )
13 / 3
Hence, the slope is 13/3
The basic formula : y = mx + b
Where b is the y-intercept and m is the slope.
We have found the slope, hence, the formula would become
... y = 13/3 x + b
Now take a coordinate and substitute it .
I will take ( 8 , 5 )
x = 8 and y = 5
Now plug in the values
... 5 = 13/3 × 5 + b
... 5 = 65/3 + b
Subtract 65/3 on both sides
... 5 - 65/3 = b
... -50/3 = b
Hence, the y-intercept is -50/3
Now plug in all the values to get the total equation...
The final equation : y = 13x/3 - 50/3
... y = 13x - 50 / 3
Hope my answer helps!!
Answer:
3-12
Step-by-step explanation:
January
June
July
That is 3 months out of 12 so...3 to 12
Answer:
x= 5.5 y=2.25
Step-by-step explanation:
5(10 - 2y) -6y=14
50-10y-6y=14
50- 16y=14
-16y=-36
divide by negtivve # to get positive #
y=2.25
substiue
x+ 2(2.25) =10
x+4.5=10
x=5.5
