Substituting x-4=y and - 5y+8x=29

Express 5.12x10 to the fourth power in standard form

Eduardo puts $40 into his piggy bank and plans to add $5 each month. Write an equation to represent this.

Find 3 different ratios that are equivalent to 7:3. Then, explain why these ratios are equivalent.

10 divided by 2 - (16 divided by 4) + 14

What is the product? (4x) (-3x^8) (-7^3)

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.