Perimeter is legnth +legnth + width + width or
P=2L+2W
L=2W
subsitute L=2W for L in P=2L+2W
P=2(2W)+2W
P=4W+2W
P=6W
we know that Perimiter=30 so
30=6W
divide both sides by 6
5=Width
subsitute W=5 for W in L=2W
L=2(5)
L=10
to check
10=2(10)+2(5)
30=20+10
30=30
checks
Legnght=10
Width=5
Answer:
5/6
Step-by-step explanation:


..............simplify the fraction

You divide 3 by 8 to get an answer of 0.375, next you want to multiply 0.375 x 100 to get an answer of 37.5... that number is your percentage 3/8 is a 37.5%
The answer may be c.
I am not clear about your question.
9x^2-12x-5=(3x-5)(3x+1)