Evaluate the expression for the given variable values. 3∣m+2n∣2−(mn)2 if m=3 and n=−5

im an idiot

-183

Step-by-step explanation:

3 | m + 2n | 2 - ( mn ) ^ 2

Let's substitute:

3 | 3 + 2 ( -5 ) | 2 - ( ( 3 ) ( -5 ) ) ^2

3 | 3 + ( -10 ) | 2 - ( -15 ) ^ 2

3 | -7 | 2 - ( -15 x -15 )

3 ( 7 ) ( 2 ) - 225

21 ( 2 ) - 225

42 - 225

-183

it costs $20 to interview each person for a survey. find the cost to obtain a +- 3% margin of error.

step-by-step explanation:

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