3x-25=6x-80
6x-3x=80-25
3x=55
x=55/3
Answer:
Linear speed= V= 175.84 m/s
Step-by-step explanation:
A wheel with a radius of 7 inches is rotating at 4 revolutions per second.
Linear speed v = rw
r= radius
r= 7 inches
w= angular speed
W= 4rev/s
But one rev= 2π
W= 4*(2π)/s
W= 8π/s
V= rw
V=7*8*3.14
V= 175.84 m/s
Answer: A
Step-by-step explanation:
Since x is the length, then x+7 has to be the width.
The area of a rectangle can be found via the formula :
A = length * width
So if we replace the area with the given number (170) and the length, and width, with what we assumed, we get..
170 = x * (x+7)
[which is.. ]
170 = x^2 +7x
0 = x^2 +7x - 170
And that is the answer.
Answer:
A. 55
Step-by-step explanation:
55 + 30 + 40 + 55 = 180
I hope this helps u! :D
