721 + 19 =
886 + 33 -
447 22=
915 + 36 =
??​

Horace's speedometer reads 60 miles per hour, but during a road test he finds that he was actually driving 58 mph. what is the percent error in horaces speedometer?

Me, the vertices of quadrilateral coat are c(2,0), o(7,0), a(7,2) and t(2,2). prove that coat is a rectangle.

X+y=-4 x-y=2 use elimination with adding and subtraction