It is B the only one that show proportionality
<h3>
Answer: 250</h3>
==================================================
Explanation:
x = speed of the plane in mph
x-180 = speed of the car, since its 180 mph slower than the plane
For the plane, we can form the equation
distance = rate*time
d = r*t
500 = xt
t = 500/x
For the car, we can say,
d = rt
140 = (x-180)t
140 = (x-180)*(500/x)
140x = 500(x-180)
140x = 500x - 90,000
140x - 500x = -90,000
-360x = -90,000
x = (-90,000)/(-360)
x = 250
The speed of the plane is 250 mph
-----------------------------
Extra info:
The car's speed is x-180 = 250-180 = 70 mph
It takes the plane t = d/r = 500/250 = 2 hours and it takes the car t = d/r = 140/70 = 2 hours. Both vehicles travel for 2 hours, which helps to confirm the answer.
Answer:
80 units
Step-by-step explanation:
The area of a trapezoid is 1/2(B1xB2) times h. 8+12 is 20, divided by 1/2 is 10, and 10 times 8 is 80.
Hope this helped!❤
Use the simple interest formula: A = P(1 + rt)
The sold 14,976 in total 1/3 of 72 is 24+72=96
96*156 =^
