Step-by-step explanation:
Train 1 speed be 'u'
Train 2 speed be 'v'
And v=2u
Speed=distance/time
Trains going in opposite directions
Relative speed= v-u (as train 1 I slower than train 2)
v-u=600/4
2u-u=150
u=150miles/hour
v=300miles/hour
Answer:
1. a) x b)1
2. a)x^3 b) 3
3. a) 3x^7 b) 7
Step-by-step explanation:
Answer:
discount = $112
sales price = $208
Step-by-step explanation:
original price of suit = $320
discount = 35% off of $320
discount = 320(0.35) = $112
sales price = original price - discount
= 320 - 320(0.35)
= 320 - 112
= $208
Answer:
d y dx=0
Explanation:
From the given
y=sin2x+cos2x
The right side of the equation is
=1
y=1
d y d x=d d x(1)=0
or we can do it this way.
y = sin2x+cos2x
d y d x=2
⋅(sinx)2−1
⋅
d d x(sinx)+2
(cosx)2−1 d d x(cosx)
d y d x=2⋅
sinx⋅cosx+2⋅cosx⋅(−sinx)
dydx=2⋅sinx⋅cosx−2⋅sinx⋅cosx
dydx=0
God bless....I hope the explanation is useful.
