Since is addition you do the opposite and subtract 12 from 12 and -5 then 12 cancels out and -5-12=-17
I think its a) 172.50 but im not exactly sure.
Answer:Although the Quadratic Formula always works as a strategy to solve quadratic equations, for many problems it is not the most efficient method. Sometimes it is faster to factor or complete the square or even just "out-think" the problem. For each equation below, choose the method you think is most efficient to solve the equation and explain your reason. Note that you do not actually need to solve the equation. a. x2+7x−8=0x
2
+7x−8=0, b. (x+2)2=49(x+2)
2
=49, c. 5x2−x−7=05x
2
−x−7=0, d. x2+4x=−1x
2
+4x=−1.
Answer:
reflection, rotation, and translation.
If you divide 4.2 by 0.02 you should get 210