The sum of two integers is 9 their difference is 5 what are the two integers

X+y=9     x=9-y
solve for x     
x-y=5   so substitute x by 9-y
9-y-y=5
9-2y=5 isolate 
9-2y-9=5-9
-2y=-4 divide both sides by -2
-2y/-2=-4/-2
y=2 and x=9-2=7
check for x+y=9
               7+2=9 
check for x-y=5
                7-2=5      so x=7 and y=2 

            

The probability that none of the three shoppers purchased electronics is 0.528

Step-by-step explanation:

Completing missing parts of the question

Electronics - 18

Pet supplies - 25

Toys - 40

Office supplies - 12

Total = 95

The probability that none of the three shoppers purchased electronics is calculated as follows.

Electronics Shoppers = 18

Non electronic shoppers = 95 - 18 = 77

Probability without replacement;

Probability that the first shopper didn't buy electronics = 77/95

Probability that the second shopper didn't buy electronics = 76/94

Probability that the third shopper didn't buy electronics = 75/93

Multiplying these values gives us our result.

Probability = 77/95 * 76/94 * 75/93

Probability = 0.528483184625943

Probability = 0.528 --- approximated

Hence, the probability that none of the three shoppers purchased electronics is 0.528