If B is the midpoint of AC, and AC = 8x – 20, find BC. 3x - 1 A B C
1 answer:
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Answer:
Here's what I get.
Step-by-step explanation:
Part A. Equation in standard form
The question is asking you to find the equation of a straight line that passes through two points
Let x = the number of days
and y = the cost
Then the coordinates of the two points are (2,225) and (5,480).
(i) Calculate the slope of the line
In other words, the daily rental is $85/day.
(ii) Calculate the y-intercept
(iii) Write the equation for the line
y = 85x + 55
That is, the cost is $55 plus $85/day
Part B. Equation in function notation
Replace y with ƒ(x)
ƒ(x) = 85x + 55
Part C. Graphing
Let's say you want to plot a graph of the rental cost for up to ten days.
(i) Calculate two points on the graph.
When x = 0, y = 85; when x = 10, y = 905.
(ii) Scale your axes
A good number of intervals is about ten.
Your x-axis should have tick marks at 1-day intervals.
Your largest y-value is 905. Ten intervals would make about $90/interval. However, you should round that up to $100/interval for easy interpolation.
Your y-axis will run from 0 to $1000 in $100 intervals.
Plot your two points and draw a straight line through them.
(iii) Axis labels
x represents the number of days, so the label on the x-axis could be "No. of days."
y represents the cost of renting the boat, so the label on the y-axis could be "Rental cost."
Your graph should resemble the one below.
Answer:
Step-by-step explanation:
Ok so to find the surface area of a cube is actually quite simple:
All of the cubes faces have the same area and the surface area is simply the total area of all of the cubes faces.
So to calculate this we can simply multiply the area of one face by the number of total faces (6)
The area of one face is 20 x 20 = 400
The surface area of the cube is: 400 x 6 =