SpawnofAngel

The parenthesis indicates a multiplication so without them it would be -2-1-3 = -6

But with them it would be -2 * -1 * -3  or -2(-1)-3

The second one indicates that the 3 is subtracting. 

-2*-1*-3 = -6

-2(-1)-3 = -1

Simply enough of a solution

x(1/8)=-3/2

x=-(3/2)/(1/8)

multiply by reciprocal

-(3/2)*(8/1)

-24/2

-12

I may have messed up. It is possible that you need to get a common denominator

-(3/2)*(16/2)

-48/2

-24

-(-5)+5^2-4(6)/2

5+25-24/2

30-12

18

Treat the starting painting as X

1/3 is the scale factor

Put the orginal on top, in place of 1, and the outcome is the original paintings size

13/3 = 4.3333333333333333

17/3 = 5.6666666666666667

So the painting was originally 4.3 by 5.6 or 5.67 depending on how you round.

This has infinite possibilities

Just requires some creativity

(54+42)/-2 = -48 could work

Rarin, show steps, don't just give anwsers

13/4 = 3.25

84294*3.25 = 273955.5

I wrote that because i knew you two would know the anwser

For my sanity, lets name each problem a roman numeral and each anwser under it a subunit

I.

   x^2-100

         x^2=100

         x=+-sqrt(100)

   a. 10

   b.-10

II.

  (x-3)(x-5)

   a.3

   b.5

III.

   (2x-1)(3x+4)

    a.2x-1=0

       1/2

    b.3x+4=0

       -4/3

IV.

   x^2-5x

   x(x-5)

  a. x=0

   B. x=5

V.

   3x^2-5x

    x(3x-5)

    a.x=0

    b.3x=5

    x=5/3

You could have googled this but i will help you

 9.4607×10^12

It is Scientific notation

9,460,700,000,000 kilometers (approx.)

So about 9.5 billion KM

Since 3 only has two factors 1 and 3, you can only hope 42087591834593475  is divisible by 3

42087591834593475 /3 = 14029197278197825

And you can see it is