What is the additive inverse of one half

There are 45 questions on your math exam. you answered 810 of them correctly. how many questions did you answer correctly?

The functions below show the amount of money bella and sweet t had saved after earning money for doing chores. which description best compares the two functions?

Given that sin∅ = 1/4, 0 < ∅ < π/2, what is the exact value of cos∅? a. (√4)/4 b. (√15)/4 c. (4π)/2 d. (4√2)/4