As a fundraiser, the Music Boosters wrapped gifts at the mall one weekend. Out of the 100 gifts they wrapped, 310 3 10 were for weddings, and 37100 37 100 were for baby showers. The rest of the gifts were for birthdays. What fraction of the gifts was for birthdays? Enter your answer in the boxes.

If cos(2x) = tan^2(y), show that cos(2y) = tan^2(x).

X+y=-4 x-y=2 use elimination with adding and subtraction

An office supply company conducted a survey before marketing a new paper shredder designed for home use. in the survey, 80 % of the people who tried the shredder were satisfied with it. because of this high satisfaction rate, the company decided to market the new shredder. assume that 80 % of all people are satisfied with this shredder. during a certain month, 100 customers bought this shredder. find the probability that of these 100 customers, the number who are satisfied is 69 or fewer.