CPhill

Take it from here

y - (-4)  = (2/3)(x - 1)   simplify

y + 4  = (2/3)x - 2/3      subtract 4 from both sides

y = (2/3)x - 2/3 - 4

y = (2/3)x - (4 + 2/3)

y = (2/3)x - 14/3

-3-x=-(x+5)+3   simplify the right side

-3 - x   =  -x - 5 + 3

-3 - x   = -x - 2   add x to both sides

-3   =  -2     and this is never true.....so.....this has no solution

[ (3 + 4/10 )  + (2 + 1/2) + ( 2 + 2/10) ]  / 3   =  27/10   = 2.7 inches

If this is

200/8 x 9⁴   we have

25 x 9⁴   =   164,025

If this is :

[ 200/8 x 9 ]⁴   we have

[25 X 9]⁴

[225]⁴

2,562,890,625

42-21x+12x=44  simplify the left side

42 - 9x  = 44     subtract 42 from both sides

-9x  = 2         divide both sides by -9

x  = -2/9

The arctan returns an angle.

The tangent returns the opposite/adjacent ratio value for an angle.

-(2 - (-2)²)² - 3x(-4)  =

- (2 - 4 )² - 3x(-4)  =

- ( -2)² - (-12x)  =

- 4 + 12x

I assume this is :

[ A + 2 ] / 2   = -1       multiply both sides by 2

A + 2   = -2              subtract 2 from both sides

A   =  -4

1 km  ≈ .6214 miles

So

1160 km  *  .6214 miles / 1 km   ≈  720.8 miles 

10^3  = 1000

So

2*10^3  =  2000  per day

And for a week we have  = 7 *2000  = 14,000