Which of the statements below provides evidence that sine and cosine are cofunctions? sin(30°)=cos(30°) sin(60°)=-cos(60°) sin(30°)=cos(-30°) sin(30°)=cos(60°)

Select all the correct statements. the amount in dollars an electrician charges in terms of the number of hours worked is represented by the function y = 22x + 42. from the function, identify all the phrases that hold true for the situation. the electrician charges an initial fee of $22 the y-variable represents the number of hours the electrician charges an initial fee of $42 the electrician charges $22 for every hour worked the x-variable represents the electricians charges in dollars the electrician charges $42 for every hour worked

Factor x2 – 8x + 15. which pair of numbers has a product of ac and a sum of what is the factored form of the

Afarm that has 4 x 10^2 acres has 1.2 x 10^5 cattle. what is the average number of cattle per acre? write the answer in scientific notation. answere asap