We aer goint to eliminate the x's
multiply first by -5 and 2nd by 2
so that is B
Answer:
where is the picture???
what are the given lengths?
Answer:
8.7 cm
Step-by-step explanation:
You know the relationship between the diagonal of a rectangular prism and the sides as
where x, y and z are the three dimensions of the prism. from your data,
or
. With some simple calculation you get
, or 
X/4 + x/5 = 1
5x/20 + 4x/20=1
9x/20 =1
9x = 20
x = 2.22 hours