Let's V the speed of the girl in step
v the speed of the escalator in step
L the length between ground and floor.
V*60+v*60=L ==> V+v=L/60
V*90-v*90=L ==> V-v=L/90
2V=L(3+2)/180
==>V=5L/360
Time to climb (in step) with v=0 (escalator standing still)
V*t=L==> t=L/V=L/(L*5/360)=72
The girl will count 72 steps.
Answer:
Part A:
- What We Need to Find is How Much money He Made over the summer
Setting Up the Problem We Would Do 160 + 180 Because we are trying to figure how Much money he made over the summer.
160 + 180 = 340
So Javonie Made 340$ over the Summer
Part B:
Determine what you need to fine?
We trying to figure Out How Much he charged per dog?
To Set up this Problem We are going to Divide 160 Divided By 8
and 180 divided by 9
160 Divided by 8 is 20 In July
180 divided by 9 is 20
so the Answer Is Javonie Charged 20$ per dog in July.
xXxAnimexXx
Have a great day!
<h3>How to graph sin100=n/1200</h3>
HopeItHelps you
Answer:
Step-by-step explanation:
For a:
ax = c - by
a = (c - by)/x
For x:
ax = c - by
x = (c - by)/a
For b:
by = c - ax
b = (c - ax)/y
For y:
by = c - ax
y = (c - ax)/b
Answer:
<u>The correct answer is B. {-2,4}</u>
Step-by-step explanation:
Let's solve for x, this way:
x + 4/4 = x /x -2
(x + 4) * ((x - 2) = 4 * x
x² - 2x + 4x -8 = 4x
x² - 2x + 4x -8 - 4x = 0
x² - 2x -8 = 0
(x - 4) * (x +2) = 0
x - 4 = 0
x + 2 = 0
x₁ = 4
x₂ = - 2
<u>The correct answer is B. {-2,4}</u>
