7 군 3.) A police officer recorded the speeds, in miles per hout, of 1 cars that passed by on a highw
are shown in the line plot below.
x x X X
Х
X X X
x x x x x x x Х
+
++ ++
50 51 52 53 54 55 56 57 58 59 60
Speeds of Cars on a Highway
(miles per hour)
How many cars had a recorded speed greater than 55 miles per hour?
A.) 6
B.) 9
C.) 12
D.) 21

b. 18

step-by-step explanation:

so the equation for this is:

ab^2=ac⋅ad

ab being the top length of 6 and ac being the length of 2 and ad being the length of x. let's plug into the equation:

6^2 = 2x

now lets just solve for x:

36 = 2x

18 = x

i hope that !

multiplication is multiplication.   it might feel harder depending on what level of math you are in, but generally it will be the same old stuff, while implementing some new concepts and methods of solving work.