43 is 10% of what number

The length of a rectangle is x times the square root of 100. the width is one-half y more than three-halves x. given that the area of the rectangle is 125 cm2, which equation could represent the rectangle in terms of x and y? a) 5xy − 15x = 125 b) 5xy + 15x = 125 c) 15x2 − 5xy = 125 d) 15x2 + 5xy = 125

Is a triangle with sides of length 6ft, 21 ft, 23 ft. a right triangle?

Y=x+2 4x+3y= -36 system of equation