Health: How is the recovery heart rate calculated? a. record the number of heartbeats in each 30-second period for two full minutes after exercising. b. record the number of heartbeats in each 15-second period for two full minutes after exercising. c. record the number of heartbeats in each 15-second period for ten full minutes after exercising. d. record the number of heartbeats in each 30-second period for five full minutes after exercising.

The value of y is –3 Step 1Equation obtained from the question. 4x² + 2y = 8 .............(1)2x² = 7..... (2)Step 2:Determination of the value of x². From equation 2,Divide both side by 2Step 3:Determination of the value of yFrom equation 1,Clear bracket Collect like terms Divide both side by 2 y = –3 Therefore, the value of y is –3Learn more:...