The intersection of two sets is the set composed by the elements that the two sets have in common.
So, we have
In this particular case, since Y is a subset of X, we have
In fact, all elements of Y are elements of X as well, so in particular they are common elements.
Answer:
2b - 15
Step-by-step explanation:
b - 7 + b - 8
You combined the two b's correctly, but didn't combine the two constants, -7 and -8.
Those combine to -7 + (-8) = -7 - 8 = -15, so the final answer is
2b - 15
you have -7 and are subtracting 8 more, so you are moving 8 units left on the number line, so it has to get more negative.
40=4×10=200 toys
160=4×40=350 toys
