What is the solution of the proportion x-1/2 = x-4/5 ? A. -2.33
B. 1
C. -1.86
D. -1

x = -1

Step-by-step explanation:

x-1/2 = x-4/5 is ambiguous (subject to misinterpretation).

It should be written with parentheses or with proper fractions:

  x - 1        x - 4

=

    2             5

Cross multiplying results in 5x - 5 = 2x - 8, or 3x = -3.  Then x = -1

Step-by-step explanation:

For this, we'll use a formula for the area of a triangle.

Area (A) = ( Base (B) * Height (H) ) / 2

D. 31.5 sq. units