So.. checking the picture below
we can say y = y, or just do a substitution and end up with

once you know, how long is "x", then you can simply use the cosine of 72° to get "r"
thus
So they bought x half gallons at $1.35 each ($2.70 per gallon). so their cost was:
C = 1.35x
Their revenue was the remainder of the milk (x - 13 that ruined) times the price:
R = 4.04(x - 13) = 4.04x - 52.52
The profit is Revenue - Cost
P = R - C = 4.04x - 52.52 - 1.35x = 2.69x - 52.52
Now we know they made 62.72 profit, so:
2.69x - 52.52 = 62.722.69x = 115.24x = 42.84 or about 43 half gallons
Answer: 28
Step-by-step explanation:
there are 3 boys for every 4 girls, so 4 times 4 is equal to 16. Now just multiply 3 times 4. 16 + 12 = 28.
The answer is 7, because 0.875*8= 7
To calculate the standard deviation of those numbers:<span>
1
Work out the Mean (the simple average of the numbers)
2
Then for each number: subtract the Mean and square the result.
Then work out the mean of those squared differences.<span>Take the square root of that and we are done!</span></span>