84 the process is shown in the following picture
Answer:
A.
x + y = 28
1.68x + 2.44y = 54.64
Step-by-step explanation:
Let x = paperback books and y = hardback books
x+y =28
We know that paperbacks cost 1.68 and hardback cost 2.44
1.68x + 2.44y = 54.64
We have 2 equations and 2 unknowns
x+y =28
1.68x + 2.44y = 54.64
Answer:
f(-3)=4
b
Step-by-step explanation:
lol is this edgenuity
∠ABC=∠CDA=72º
∠DAB=∠BCD=x
∠ABC+∠CDA+∠DAB+∠BCD=360º
Therefore:
72º+72º+x+x=360º
144º+2x=360º
2x=360º-144º
2x=216º
x=216º/2
x=108º
So, <span>∠DAB=∠BCD=x=108º
Answer: </span>∠DAB=108º (B)
