935 of the boxes will weigh 25 oz or less.
The z-score for this value is
Looking this up in a z-table (http://www.z-table.com) we see that the probability of something being less than or equal to this value (the area under the curve to the left) is 0.7794.
Multiply this probability by the number of items:
0.7794(1200) = 935.28 ≈ 935.
12 and any number higher than 12 solves this inequality.
Breakdown: The inequality is saying y subtract 6 is greater than or equal to 12. Any number less than 12 will not satisfy this.
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The answer is the third option because in order to get x alone you divide by 5 so you divide 2y by 5 also to get 2y/5. Hope this helps!
No, the first one equals 15 and the second one equals 1
The simplified form is 4m^5