Answer:
D.) 1/5
Explanation:
Experimental probability is the ratio of the number of successes to the number of trials.
In this case, success is a bulls-eye. Tim had 10 bulls-eyes. The total number of trials is 50. This makes the experimental probability 10/50, or 1/5.
C had the coordinate pair of (-2,2)
Let the age of the older person be x, and the age of the younger y.
"An older person is 3 years older than 8 times the age of a younger" can be represented by the equation x = 8y + 3
"The sum of their ages is 48" can be represented by x + y = 48
We can now create a system:
x = 8y + 3 (1)
x + y = 48 (2)
Let's use the value of x in the equation (1) in equation (2) to find the value of y:
x + y = 48
8y + 3 + y = 48
9y + 3 = 48
Subtract 3 from each side to have the variables on a side and the numbers on the other:
9y + 3 - 3 = 48 - 3
9y = 45
Divide both sides by 9 to get y alone on a side and its value on the other side:
(9y)/9 = 45/9
y = 5
Let's replace y by it's value in the equation (1) to find x:
x = 8y + 3 = 8*5 + 3 = 40 + 3 = 43.
So the older person is 43 years old, and the younger person is 5 years old.
You can recheck your answer (very important):
x + y = 43 + 5 = 48 (The sum of their ages is 48)
8y + 3 = 8*5 + 3 = 43 = x (an older is 3 years older than eight times the age of a younger)
The answer has been approved.
Hope this Helps! :)
Answer:
She earns $6.50 from the Smiths which is 25 cents more than she earns at the Nelsons.
Step-by-step explanation:
To solve this problem you must find the hourly rate she earns at the Smiths. This will allow you to compare to the hourly rate that is given for the Nelsons. To find the Smiths hourly rate divide $39 by the 6 hours she babysat there. This will have the hourly rate. 39/6=6.5. This means she earns $6.50 an hour for the Smiths. When comparing the rates it is clear that she earned 25 cents more at the Smiths.
