ElectricPavlov

Their closing speed is 2.5 + 2 = 4.5  m/hr

11.25 m / 4.5 m/hr = 2.5 hr

Is this question transcribed correctly?   Is there a little more information that was perhaps omitted???   

= 1/2 ln(x+37)  = ln {(x^2-25)/(x+5)}

1/2 ln (x+37)= ln (x-5)

ln (x+37)^1/2 =ln(x-5)

sqrt (x+37 ) = x-5

x+37 = x^2 -10x+25

x^2 -11x-12   = 0

(x-12)(x+1) = 0      x = 12    or -1  (throw out....would result in  ln  of negative number)  

 y-2x  = -3.5  

-2y+x = -14     or   x = 2y-14     Use this value of x to sub into first equation

y - 2(2y-14) = - 3.5

y - 4y + 28 = - 3.5

-3y = -31.5

y = 10.5                     Substitute this value of y into one of th equations to find x

x = 2y-14

x = 2(10.5) -14

x = 7

33.3333 %

MS.....I told you it was A     the question says 'choose all that apply'

A   C   D      is the answer......You should look at the diagram and UNDERSTAND why.....just pasting your answer does you no good whatsoever...you are not learning anything and will soon  (if not already) be in over your head.....

Yes !  

See N on the number line.......close to -3       between  -3 and -4......which answer fits?

I already told you it is A      What about  C   or   D  ?

Bingo !