What does to double mean in Math Patterns?

What is the solution to the equation 21^x-3=14? x=-2.133 x=-1.846 x=3.867 x=4.154

Which is the angle measure represented by 7.5 rotations clockwise?

All of the following represent three multiplied by six except 3 (6) 3:6 3 · 6 3 * 6

A basketball arena can hold approximately 7,000 people. Fans bought 5,134 tickets before the game. About how many more seats are left to fill before the game.

In this equation, y-4/2=10, would i need to get the same denominator y-4/2=10/2 = y-2=5?

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.