Sendo A = [ − ] e B = [ − −], temos que odet(A + B) – det(A. B) vale:
(A) 0
(B) 10
(C) -10
(D) 20
(E) -20

Fredrick designed an experiment in which he spun a spinner 20 times and recorded the results of each spin

You are making a blueprint of your bedroom and you plan to use a scale factor of 18 . the actual width of your room is 14 feet and the actual length of your room is 16 feet. determine the width and length of your room on the blueprint. on the blueprint, your room will have a width of feet and a length of feet.

Determine the number of girls in a math class with 87 boys if there are 25 girls for every 75 boys