Ineed ! show your work . 6th grade math surface area !

What is the area of a pizza with a radius of 40 cm leave the answer in terms of π to find your exact answer 40π cm² 1600π cm² 800π cm² 80π cm² π=pi

Solve this equation using substitution. {4x + y = −2} {4x + 6y = 44}

What statement is true? 2x^2-9x+2=-1