Simplify the following expressions and evaluate any numerical expressions. (−3x)2

Select one:

−9x4

−9x2

9x4

9x2

You are making a battery for a science project. you have copper wire for your first electrode. you need to choose a conductor, a second electrode, and a device to plug into your battery. you have already chosen a lemon conductor. complete each statement below about the options that include a lemon conductor.

Sam claims that cos x =sin y if x and y are congruent angels. is sam correct ?

Solve the following simultaneous equation by using an algebraic method (either substitution or elimination) 2x + 3y=-4 4x-y=11