Answer: 0.82 miles per gallon
Step-by-step explanation:
Given : Jenna has bought a new hybrid car. Each week for a period of seven weeks, she has noted the fuel efficiency (x) (in miles per gallon) of her car.
The results are :45 44 43 44 45 44 43
The formula to find the standard deviation is given by :-
First we find mean of the given data ,
Now,
Now, standard deviation of the above results will be :-
Hence, the standard deviation of these results = 0.82 miles per gallon
X would equal 11. hope this helps. good luck!
First multiply all the items up with their correct prices.
5 Golf Clubs = 18.65 each
5 x 18.65 = 93.25
60 Golf Balls = 16.50 per dozen
60 = 5 dozen
5 x 16.50 = 82.5
1 pair of golf shoes = 75.80
1 x 75.80 = 75.80
Now, add them all up.
93.25 + 82.5 + 75.80 = 251.55
Lastly, multiply by 1.15 to add the 15% sales tax.
251.55 x 1.15 = 289.28
Thus, the total cost of all the equipment with tax is $289.28
Answer: The answer is (a) 3 × x = y and (b) x + x + x = y.
Step-by-step explanation: Let 'x' and 'y' denote the number of hours that Tina practised last month and this month respectively.
Then, according to the given information, we have
x = 15 and y = 45.
We can write the relation between 'x' and 'y' in two forms as follows -
(a) Multiplication form : 3 × 5 = 15 implies 3 × x = y.
(b) Addition form : 15 +15 +15 = 45 implies x + x + x = y.
Thus, the answers are (3 × x = y) and (x + x + x = y).
0.63 is the correct answer
