If something starts with a value of 600000 and decreases at a rate of 500 per minute, how long will it take the value to reach 273000

Which math sentence can be used to determine if the triangle is a right triangle?

Which is a true statement comparing the graphs of x^2/6^2-y^2/8^2 = 1 and x^2/8^2-y^2/6^2 the foci of both graphs are the same points. the lengths of both transverse axes are the same. the directrices of = 1 are horizontal while the directrices of = 1 are vertical. the vertices of = 1 are on the y-axis while the vertices of = 1 are on the x-axis.

Solve this system of equations. 12x − 18y = 27 4x − 6y = 10