Charmaine's coffee shop makes a blend that is a mixture of two types of coffee. Type a coffee cost Charmaine $4.35 per pound, and type B cost $5.80 per pound. This month the blend used twice as many pounds of type B coffee as type a, for a total cost of $542.30 how many pounds of type a coffee were used?

Which expression is equivalent to 5r6141 2r+st6

Anyone know? will mark brainliest if correct!

In one day there are too high tides into low tides and equally spaced intervals the high tide is observed to be 6 feet above the average sea level after six hours passed a low tide occurs at 6 feet below the average sea level in this task you will model this occurrence using a trigonometric function by using x as a measurement of time assume the first high tide occurs at x=0. a. what are the independent and dependent variables? b. determine these key features of the function that models the tide: 1.amplitude 2.period 3.frequency 4.midline 5.vertical shift 6.phase shift c. create a trigonometric function that models the ocean tide for a period of 12 hours. d.what is the height of the tide after 93 hours?