1. John's weight at his last five doctors' appointments has been 180 lbs, 170 lbs, 168 lbs, 184 lbs, and 182 lbs. What must John's welght be at his next doctor's appointment to have a mean weight of 175 lbs?

166

Step-by-step explanation:

1050-884=166

6x175=1050

b) yes

step-by-step explanation:

let the statements be named as,

statement 1: if the power has been cut, then the refrigerator does not work.

statement 2: the refrigerator does not work.

conclusion: the power has been cut

now, 'law of detachment states that if we have the statements given as,

1. if p, then q.

2. p

then, we get the true statement or conclusion as q'.

thus, on comparing, we get that,

p: if the power has been cut.

q: the refrigerator does not work.

so, the argument is true by the law of detachment.