Solve the problem.In one study the maximum heart rates of conditioned athletes were examined. A group of athletes was exercised to exhaustion. Let x represent an athlete's heart rate five seconds after stopping exercise and y represent an athlete's heart rate ten seconds after stopping exercise. It was found that the maximum heart rate H for these athletes satisfied the following two equations. H = 0.491 x + 0.468 y + 11.2 H = -0.981 x + 1.872y + 26.4If an athlete had a maximum heart rate of H = 151, determine the value of x graphically to the tenths place.
A. x = 148.2
B. x = 147.6
C. x = 147.1
D. x = 147.9
Answer: B
You might also like to view...
The table of values gives two points that lie on a line. Use the points to find the slope and y-intercept of the line. Then use these values to write an equation of the line in slope-intercept form. 
A. y = 
x - 
B. y = 
x - 
C. y = - 
x - 
D. y = - 
x - 
Identify the conic section as a circle, parabola, ellipse, or hyperbola.
A. Parabola B. Ellipse C. Hyperbola D. Circle
The linear programming problem has an unusual characteristic. Select a graph of the solution region for the problem and describe the unusual characteristic. Find the minimum value of the objective function (if possible) and where it occurs. ? Objective function: ? z = 2.5x + y ? Constraints: ? x ? 0 y ? 0 3x + 5y ? 15 ?5x + 2y ? 10 ?
A. 
Minimum at (0, 0): 0
B.
Minimum at 
: 5.00
C. ?
Minimum at 
: 2.63
D. ?
No minimum
E. ?
Minimum at 
: 6.97
Evaluate.
for x = 6, y = 7
A. 
B. 
C. 
D. 