HELP HELP HELPPP PLEASEE which expression has a leading coefficient that is a perfect square?

49w2+w+53

10w2−19w+100

2w2+25w−9

50w2−5w+25

In the figure shown below, m < 40 and ab =8. which equation could be used to find x?

1. evaluate 8x(2)y9(-2) for x=-1 and y=2 2. simplify the equation. -() 3. simplify the expression. [tex]\frac{5}{x(-2) y9(5)}[/tex]

Abicycle training wheel has a radius of 3 inches. the bicycle wheel has a radius of 10 inches.approximately how much smaller, in square inches and rounded to the nearest hundredth, is the area of the training wheel than the area of the regular wheel? *