7x(-3) x (-2)^2 help please!
2 answers:
Answer:
7\times (-3) \times (-2)^2=-21\times 4=-84
Step-by-step explanation:
Multiplication :
Multiplication means to add equal groups or we can say multiplication is repeated addition . We use symbol × to denote multiplication .
Consider a bag containing 5 balls then 7 bags will contain balls or we can directy say that 5 bags will contain 5×7 = 35 balls .
If we are saying 6 times 8, it means 8+8+8+8+8+8 = 6+6+6+6+6+6+6+6 .
i.e 8 is added 6 times or 6 is added 8 times .
In problem 7×9 = 63 , 7 and 9 are factors and 63 is the product .
To find :
Solving
Solving
Therefore ,
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Answer:
Assuming that the $1 bill was pulled at random, then the expected value of the amount chosen is .
Step-by-step explanation:
From the given question, the bag contains;
$1 bill = 7
$5 bill = 1
$10 bill = 3
$20 bill = 2
Total number of bills in the bag = 13
Pulling a bill at random, the bills would have an expected value as follows:
For $1 bill, the expected value =
For $5 bill, expected value =
For $10 bill, expected value =
For $20 bill, the expected value =
Assuming that the $1 bill was pulled at random, then the expected value of the amount chosen is .