The sum of the digits of a two digit number is 14. The difference between the tens digit and the units digit is 2.
If x is the tens digit and y is the ones digit, which system of equations represents the word problem?
xy = 14 and x-y=2
x + y = 14 and x - y = 2
x+ y = 14 and y - x= 2

The gades foundation and hbm corporation are eager to donate generously to their favorite charities. the gades foundation donated $250 in the first month, and each month afterward their cumulative donation total increases by 100$ the hbm corporation donated $64, in the first month, and each month afterward their cumulative donation total increases by 75%. in which month will the hbm corporation's cumulative donation total first exceed the gades foundations' cumulative donation total?

Find the center and the radius of the circle with the equation: x^2-2x+y^2+4y+1=0?

Triangles abc and dfg are given. find the lengths of all other sides of these triangles if: b ∠a≅∠d, ab·dg=ac·df, ac=7 cm, bc=15 cm, fg=20 cm, and df-ab=3 cm.