at a local grocery store apples cost $0.50 each and bananas cost $0.30 each. the expression 0.50x+0.30y can be used to find the
2 answers:
Answer: The x and y represents the number of bought apples and bananas respectively. The coefficients represents the cost of each apple and banana.
Explanation:
It is given that at a local grocery store apples cost $0.50 each and bananas cost $0.30 each. the expression 0.50x+0.30y can be used to find the cost of buying some apples and bananas.
Let the number of apple purchased be x and number of banana purchased be y.
The cost of each apple is $0.50. So, the cost of purchased apple is 0.50x.
The cost of each apple is $0.30. So, the cost of purchased apple is 0.30y.
The total cost is the sum of cost of apples and cost of bananas.
It is same as the given equation.
So, the x and y represents the number of purchased apples and bananas respectively. The coefficients represents the cost of each apple and banana.
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Answer:
0.45% probability that they are both queens.
Step-by-step explanation:
A probability is the number of desired outcomes divided by the number of total outcomes
The combinations formula is important in this problem:
is the number of different combinations of x objects from a set of n elements, given by the following formula.
Desired outcomes
You want 2 queens. Four cards are queens. I am going to call then A,B,C,D. A and B is the same outcome as B and A. That is, the order is not important, so this is why we use the combinations formula.
The number of desired outcomes is a combinations of 2 cards from a set of 4(queens). So
Total outcomes
Combinations of 2 from a set of 52(number of playing cards). So
What is the probability that they are both queens?
0.45% probability that they are both queens.