f(b) = -1/6b + 8. Is the function rule if you want. further explanation just ask.
X = 1 hr lessons and y = 1/2 hr lessons
x + y = 35......y = 35 - x
40x + 25y = 1115
40x + 25(35 - x) = 1115
40x + 875 - 25x = 1115
40x - 25x = 1115 - 875
15x = 240
x = 240/15
x = 16 <=== there are 16 one-hr lessons
and 19 half-hr lessons
Sorry I don’t know the answer and the question to
161.5 miles / 3.5 hrs = 46.143 mph
3 hundreds + 7 hundreds = 1 thousand
300 + 700 = 1000
