Chapter 5: Q. 186 (page 644)
The sum of two numbers is negative sixteen. One number is seven times the other. Find the numbers.
Numbers are -14 and -2
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Determine whether the ordered pair is the solution to the system
(a)
(b)
In the following exercises, translate to a system of equations and solve.
Felecia left her home to visit her daughter driving 45 mph. Her husband waited for the dog sitter to arrive and left home twenty minutes (1/3hour) later. He drove 55 mph to catch up to Felecia. How long before he reaches her?
Determine whether the ordered pair is the solution to the system
(a)
(b)
In the following exercises, translate to a system of equations and solve.
Sarah left Minneapolis heading east on the interstate at a speed of 60 mph. Her sister followed her on the same route, leaving two hours later and driving at a rate of 70 mph. How long will it take for Sarah’s sister to catch up to Sarah.
When Gloria spent 15 minutes on the elliptical trainer and then did circuit training for 30 minutes, her fitness app says she burned 435 calories. When she spent 30 minutes on the elliptical trainer and 40 minutes circuit training she burned 690 calories. Solve the system for e, the number of calories she burns for each minute on the elliptical trainer, and c, the number of calories she burns for each minute of circuit training.
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