What is the value of the expression 2(a + b)2- b), when a = 7 and b= 1?
OA) 14
OB) 49
OC) 126
OD) 127
PLEASE HELP ME

Classify the polygon by its number of sides. state whether the polygon appears to be regular or not regular. a.heptagon, regular b. heptagon, not regular c. octagon, regular d. octagon, not regular

The table represents a linear function. what is the slope of the function? –6 –4 4 6

In triangle △abc, ∠abc=90°, bh is an altitude. find the missing lengths. ah=4 and hc=1, find bh.