During exercise, the recommended maximum heart rate in beats per minute is modeled by the formula, m = 176 – 0.8a, where m is the maximum heart rate and a is the person’s age. solve the formula for a. at what age would you have a recommended maximum heart rate in beats per minute of 140?

25 ! the line of best fit is h = 5a + 86. predict the height at age 16. show your work.

Efficient homemakers ltd. makes canvas wallets and leather wallets as part of a money-making project. for the canvas wallets, they need two yards of canvas and two yards of leather. for the leather wallets, they need four yards of leather and three yards of canvas. their production unit has purchased 44 yards of leather and 40 yards of canvas. let x be the number of leather wallets and y be the number of canvas wallets. draw the graph showing the feasible region to represent the number of the leather and canvas wallets that can be produced.

Tyler reads 2/5 of a book on monday, 1/3 of it on tuesday, 2/9 of it on wednesday, and 3/4 of the remainder on thursday. if he still has 14 pages left to read on friday, how many pages are there in the book?