I'll give you a hint. A rectangle, a rhombus, and a square are all types of parallelograms. How many sides do they all have? Should come to you quick, good luck^^
Answer:
4x + 50 = y
Step-by-step explanation:
Since it is $4 for each audiobook, this means that it is the slope.
Since Jamal started with an initial fee, this makes it the y-intercept.
So the equation is $4 per audiobook = 4x, initial fee of $50 which makes the equation: 4x + 50 = y
<u>Y-intercept</u> is the starting number, in this case, the initial fee.
<u>Slope</u> is the rate at which a value is increasing, in this case, for each audiobook bought, $4 is spent
Y=2x+0
the y intercept is 0 and the slope is 2/1
To find the rate (or speed) of an object you use the equation
Rate = Distance x Time or
d = rt So, just fill in the equation with the first set of numbers.
64 = r(1.7) Then divide.
r ≈ 37.65
Then, find the second speed.
d = rt
80 = r(1.9) And divide.
r ≈ 42. 11
Since you need to find the average speed just find the average of the two speeds. So
(42.11 + 37.65) / 2
79.76 / 2
39.88
So the average speed of the train was about 39.9 miles per hour.
