For which value of theta is sine theta = negative 1?

Question: what is the value of x 4x-2= (-7) +5x. it would be greatly appreciated if someone could actually explain to me step by step

Fanny mendelssohn manages all the magazines and paperback books at a local grocery store. she prices many paperbacks to sell at $7.99. the cost to the store is $5.29. what is the markup rate on a paperback book, based on its cost?

15 there is a line that includes the point 0,10 and has a slope of 7/4. what is it’s equation in slope intercept form