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y=(x+4)^2 -37

Step-by-step explanation:

y+ ? = x^2 +8x+ ?-21

y+? =x^2+8x +16-21

y+16=x^2+8x+16-21

y+16=(x+4)^2 -21

y=(x+4)^2-21-16

Calculate the difference

y=(x+4)^2 -37

question: use the following table of a school bus during morning pickups to calculate its average speed between 2.8 km and 4.2 km

answer: 42 km/h

explanation: 1.4/0.033 42.42424 = 42 km/h

question answered by

(jacemorris04)

2

step-by-step explanation: