Answer:
S= z (y-x)/(x+y)
Step-by-step explanation:
Lets the speed of high speed train = u
Lets the regular speed train = v
We know that
Distance = Speed x time
For high speed train
z = u .x
u= z/x ----------1
For regular speed train
z = v .y
v = z/y -------------2
Both are traveling in opposite direction so relative speed
Vr = z / x+ z /y
Lets in time t they will meet
z = (z / x+ z /y) t
t= xy/ (x+y)
Lets take distance cover by high speed train is m when it moves A to B and speed cover by regular train is n when it is moving B to A.They meet at time t.
m = u .t
m = z / x .xy/ (x+y)
m = zy/ (x+y) -----------3
n = v .t
n = z / y .xy/ (x+y)
n = zx/ (x+y) -----------4
From equation 3 and 4
So
m - n= zy/ (x+y) - zx/ (x+y)
S= z (y-x)/(x+y)
Option a is correct.
Answer:
18
Step-by-step explanation:
54/9 + 12
6 + 12
= 18
Answer:
25x^2 = x + 3
Step-by-step explanation:
So, the square of 5 times the number is (5x)2 which equals 25 x2.
But that is equal to three more than the number, or x + 3.
in your format it would be x+3=25x^2.
I dont know anything about the 5 step problem solving plan...
but ur equation is : y = 6x...where y is total saved and x is number of weeks.
when she has a total of 60 bucks....so y = 60
60 = 6x
60/6 = x
10 = x....so it would take her 10 weeks <==
