Evaluate the related series described 4 - 12 + 36 - 108 n=6

Sold 45 of his DVDs and purchased 10 more. If Smith has 15 DVDs now, how many DVDs did he have to begin with?

is a right triangle. The legs of are 9 ft and 12 ft. The shortest side of is 13.5 ft, and. How long is the hypotenuse of?

A particular strain of bacteria triples in population every 15 minutes. Assuming you start with 120 bacteria in a petri dish, how many bacteria will there be in 1 hour

Given the proportion a/b = 8/15, what ratio completes the equivalent proportion a/8=?

Circle O shown below has a radius of 29 inches. To the nearest tenth of an inch, determine the length of the arc, xx, subtended by an angle of 106^{/circ}106 ∘.

A newspaper reporter wants to know how popular the hobby of bird watching is in the city. He asked people at the local bird refuge if they watched birds as a hobby. Which of the following best explains whether the reporters data is valid or not?

I am very confused on how to figure out if y = 3/4x is proportional?

Alison wants to buy a mountain bike for $339.12. If she saves $28.26 each month, in how many months will she be able to buy the bike?

At 12 o'clock the temperature was 7°C. The temperature decreased by - 20°C. What is the new temperature?

Ashleys rentals charges $27.50 per hour to rent a surfboard and a wetsuit. Darlas surf shop charges $23.25 per hour to rent a surfboard plus $17 extra for a wetsuit.