ElectricPavlov

G = k/d^2      k is a constant   d = distance

600 newtons = k / (4000²)

600 (4000^2) = k = 9,600,000,000   N-mile²

? = 9600000000/(240000)² =  .1667 N

4a   y = 3x-2

4b   find slope   (y1-y2) / (x1-x2) = 2/3       

                         point slope form (using point  2,5   ....you could just the same use   -4,1)

                                               (y-5) = 2/3 (x-2) 

Looks like   4 x 5 = 20 possibilities

    only primes would be the primes in set 2   x    one   =====   5  0r 7 

2 out of 20 = 1/10 = .1    or 10%

The GRAPH is just the slanted line..... they provided the triangle to make it easier to calculate the slope

    slope =   rise / run =   - 16/ 4 =  -4

       y -axis intercept is shown as 16

y = -4x +16          *** edited...as per guest below....thanx!  I had made some corrections before posting, but didn't change that! ***

(x²+4)(x-7)

(x-2i)(x+2i)(x-7)

The triangle interior angle not labelled is     180 - (7x-3)

  All three of the interior angles sum to 180 degrees  

      41     + (4x-2)    +  (180-(7x-3)) = 180      now you should be able to easily solve for 'x'

JM = 17

   4x+1    + 3x+2 = 17

x = 2     JK = 9

9x+27 > 45

9x > 18

x > 1/2

9x+27<153

9x < 126

x < 14                                        combined        1/2 < x < 14         or maybe      (1/2,14)

Parallel slope = 4

(y-23) = 4(x-4)

My guess    replaced    4/52 * 4/52 * 4/52 = ........

              NOT replaced   4/52 * 3/51 * 2/50 = ........          *** edited numerators and fixed spelling error * * *