Witch ones are mathematical sentences?

5g=9

4x

8r=12

R+7=4

34

X=1

If Tan x = 3/4, and 0

Simplify 4x^3+9 (2x^3-5b^5

What percent is equivalent to StartFraction 1 Over 25 EndFraction? 4% 5% 20% 25%

Three dices are thrown. what is the probability of getting 6 in all the three dices

Y is equal to one less than the square of x

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.