What does double brackets mean in calculus?

Find the least common multiple of 10 and 16.

Solve using linear combination 5x+2y=10 3x+2y=6

The county water department charges a service fee of $10.15 plus $0.005 for each gallon of water used. The inequality shown is used to determine the number of gallons of water, x, used by customers whose monthly charges range from $35 to $55.

The circumference of a circle always about three times larger than the diameter we know as blank or blank symbol and use the number blank

What is 11d - (-2) < - 15

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.