Answer:
Rob saved $30 to buy new Mp3 player.
Step-by-step explanation:
Given:
Rob is saving money to buy a new Mp3 player.
For every $14 earned he saved $5.
For 14 dollars earned = Money Saved $5
Total money earned in babysitting = $84
We need to find Total money he saved.
Now 14 dollars earned = Money Saved $5
So 84 Dollars earned = Total Money saved
We will use Cross Multiplication method to find the Total Money saved.
Total Money Saved =
Hence Rob saved $30 to buy new Mp3 player.
Answer with Step-by-step explanation:
a.
x is a real number
Therefore, the set={-1,1}
b.x is a positive integer less than 12
Therefore, the value of x are
1,2,3,4,5,6,7,8,9,10,11
Set={1,2,3,4,5,6,7,8,9,10,11}
c.x is a square of an integer and x<100
Therefore, the value of x can be
1,4,9,16,25,36,49,64,81
Set={1,4,9,16,25,36,49,64,81}
d.x is an integer such that
But x is an integer
and
are not integers.
Therefore, there is no integer element which satisfied
Set=Null set=
Tìm giá trị của x :
Bây giờ, có hai trường hợp :
Trường hợp 1. khi nào x + 3 = 0
Trường hợp 2. khi nào x - 2 = 0
Tôi hy vọng nó đã giúp !