Which two triangles go together as the pre-image and the reflected image?

1 and 2
2 and 3
3 and 4
1 and 4

Which of the following is most likely the next step in the series? a3z, b6y, c9x, d12w, е15v, f18u

Find dy/dx using implicit differentiation ln(20+e^xy)=y

The power generated by an electrical circuit (in watts) as a function of its current c (in amperes) is modeled by p(c)= -15c(c-8) what current will produce the maximum power?