Joe: 24
John: 2/3 of 24 is 16
Jessie: 24 + 16 = 40; 1/5 of 40 is 8
Jessie makes $8 an hour.
If x=10 than f(x)=1 because 2+8=10/10 =1
Take a look at the attachment below. It proves that the inverse of matrix P does exists, as <u><em>option c,</em></u>
<u><em /></u>
Hope that helps!