Let
x--------> the speed of the girl in step
y--------> the speed of the escalator in step
d------> the distance between ground and floor.
we know that
when the girl is going up on escalator
----> equation 
when the girl is going down on escalator
-------> equation 
Adds equation and equation
--------> equation 
Time to climb (in step) with y=0 (escalator standing still)
-----> equation 
Substitute equation in equation
therefore
the answer is
Answer:
? = 14
Step-by-step explanation:
Since this is a right triangle, we can use trig functions
tan theta = opp /adj
tan ? = 8/33
Taking the inverse tan of each side
tan ^-1 ( tan ?) = tan ^-1 ( 8/33)
? =13.62699
To the nearest degree
? = 14
Answer:
x y
-2 4
0 0
1 -2
2 4
Step-by-step explanation:
in the equation replace x with the number from the table in the x colum then complete the equation
Answer:
c
Step-by-step explanation:
1/4 + 7/8 =
2/8 + 7/8 Convert the 1/4 to the denominator as 8 so we can add the top number.
9/8 Add the top number.
1 1/8 Simplifly the result.
