I havent read this book in a while but im pretty sure its "C"
Let the price of single algebra book = x
and the price of geometry book = y
Then equation (1) = 2x+3y=34
3y= (34 - 2x)
y= (34 - 2x)/3
And equation (2) = 3x + 2y=36
put value of y in equation (2)
3x + 2 (34-2x)/3= 36
9x + 2 (34-2x)=108
9x + 68 - 4x=108
5x=40
x=8
put x=8 in equation ( 1 )
2(8) + 3y= 34
16+3y=34
3y=18
y=6
Hence, price of algebra book = 8$ and price of geometry book=6$
Answer:
C. Object permanence
Explanation:
This question should be answered looking at the definition of all four phrases:
A. conservation refers not using resources in a wasteful manner.
B. Sensorimotor Memory refers to your muscles and sensorimotor system developing a memory to do certain activities over time.
C. Object permannence refers to the understanding that objects don't disappear just because you cannot see them.
D. Egocentrism is the inability to see something through someone else's perspective.
From looking at the definitions it is clear that the answer is C, since Ellie forgot about the truck as soon as she could no longer see it.
