He's driving 42mph. 42m/60h=0.7mpm. 12 minutes x 0.7 mile per minute= 8.4 miles. 21-8.4=12.6 miles left . 12.6 x 0.7= 8.86 minutes left or about nine
Answer:
the answer is 13 and 3/4 and the dog is 2 and 3/4 im pretty sure
Step-by-step explanation:
you add for the fisrt one than subtract for the second one
We can rewrite this by subtracting the right side to get
... 3^(-x) -x^3 -x = 0
A graphing calculator shows this to have a solution near x=0.5.
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There are no algebraic means for solving such a combination of exponential and polynomial functions.