Here is your answer
Add 315 gallons of 70% antifreeze to 90 gallons of 25% antifreeze to make a 60% mixture.
Answer:
y = 28 degrees
x = 28 degrees
Step-by-step explanation:
A right angle = 90 degrees
90 degrees - 62 degrees = 28 degrees
This is for both x and y because 62 degrees occupies both the right angles.
300 = Total candies
28% = Percent of candies that are red
100% - 28% = 72%
72% = Percent of candies that are <em>NOT</em> red
My personal preference for setting up this type of question:
300 -> 100% (Total candies)
___ -> 72% (<em>NOT</em> red candies)
___ -> 28% (Red candies)
Next:
28% = 0.28
300 x 0.28 = 84
84 = Number of candies that are red
300 -> 100% (Total candies)
___ -> 72% (<em>NOT</em> red candies)
84 -> 28% (Red candies)
Now:
300 - 84 = 216
300 -> 100% (Total candies)
216 -> 72% (<em>NOT</em> red candies)
84 -> 28% (Red candies)
<u>216 equals the number of candies that are </u><em><u>NOT</u></em><u> red.</u>
You have r^2 = 64 and want to find the square root of 64, which we'll call r.
√(r^2) = r = plus or minus √64
or: r = plus or minus 8
Answer:
10. 32 & 37
11. 3 & 4
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