If the length of a rectangular sandbox is 5x+3 and the width is 2x-4, what is the perimeter of the sandbox?

14x-2

Step-by-step explanation:

This is the right answer

14x - 2

Step-by-step explanation:

The opposite sides of the rectangle are congruent, then perimeter (P) is

P = 2(5x + 3) + 2(2x - 4) ← distribute parenthesis

 = 10x + 6 + 4x - 8 ← collect like terms

 = 14x - 2

d. bc = 12 and ef = 16

step-by-step explanation:

we are given that δabc : δdef such that .

also, it is given that

so, from the options, we need that .

a.

b.

c.  

d.

as, we can see that only option d gives the same ratio as i.e. .

hence, the possible lengths are bc = 12 and ef = 16.