Evaluate the expression 7x2y, when x = 3 and y = 4. ^ the 2 is too the power of whatever x is.

What would be the reasons for lines 3 and 4? a. addition property; subtraction property b. addition property; solve c. substitution property; subtraction property d. substitution property; prove

Which is the standard form for this number? (2 x 10) + (5 x 1) + (8 x 1 10,000 )

Which is the directrix of a parabola with equation x2=8y y = 2 x= -2 y=-2 x= 2