Pat has two sheets of large, square stamps. one sheet consists of $9$ stamps arranged in a $3$-by-$3$ square. (that's $3$ stamps by $3$ stamps, not $3$ inches by $3$ inches.) the other sheet consists of $36$ stamps arranged in a $6$-by-$6$ square. the stamps on each sheet are separated by perforated creases. all the stamps on both sheets are the same shape and size.

the total length of the creases on the $3$-by-$3$ sheet is $18$ inches.

how many inches of creases does the $6$-by-$6$ sheet have?

Which mathematical statements are true? 1) if 3 is an odd number, then 3 times 3 is an even number. 2) if 6 is less than 7, then 4 is greater than 7. 3) six is divisible by 3, and 10 is a multiple of 2. 4) the average of the data is greater than the largest value in the data, or it’s less than the largest value in the data. 5) the slope of a linear graph is its rate of change, and the graph’s y-intercept is the initial value. 6) if an equilateral triangle has equal angles, then all its angles will measure 45°.

You paid 28.00 for 8 gallons of gasoline. how much would you pay for 15 gallons of gasoline?

Can someone me with #s 8, 9, and 11. with just one of the three also works. prove using only trig identities.