Answer:B
Step-by-step explanation:
We know that
the length of Q is 25% more than the length of p
so
length Q=1.25*40--------> 50 cm
the area of Q is 10% less than the area of p
Area Q=50*y
Area P=40*x
so
50*y=0.90*[40*x]---------> 50*y=36*x-------> x/y=50/36---> 25/18
the answer
the ratio x:y is 25:18
4 thousand 7 hundred is 4,700
5x^2-x(x+4)
5x^2-x^2-4x
4x^2-4x is your answer
