9514 1404 393
Answer:
x = 21
Step-by-step explanation:
The parallel lines divide the segments proportionally.
x/27 = 28/36
x = 27(28/36) . . . . multiply by 27 (in your head: (3·9)(4·7)/(4·9) = 3·7)
x = 21
A mountaineer climbed 1000 feet at a rate of x feet/hour
1000 = x ( t 1 ) eq1
5000 = X ( t 2) eq2 ( he climbed additional at different rate )
the rate was 10 feet / hour less than twice the first rate
X = 2x - 10 eq3
take eq1 and eq 2
( total time = t 1 + t 2 = T)
T = 1000/x + 5000/X
but X = 2x-10
T = 1000/x + 5000/( 2x -10)
T = 1000/x + 5000/( 2(x-5))
T = 1000/x + 2500 / (x-5)
We are given
Firstly, we will simplify left side
and we will check whether it is equal to right side
Left side:
Let's assume y left side expression
now, we can take cos on both sides
we can simplify it
Right side:
Let's assume y left side expression
Multiply both sides by -1
now, we can take cos on both sides
we can simplify it
we can see that
both sides cos(y) value is different
so, this is FALSE.........Answer
Answer:
What ever it is, it should be minus. a = - 2
Step-by-step explanation:
Givens
v1 = - 2
v2 = - 10
t = 4 seconds
formula
a = (vf - vi)/t
Solution
a = (-10 - (-2)) / 4
a = (-10 + 2) / 4
a = (-8)/4
a = -2 m/s^2
