Yeah ur right that is the answer
You need to find the total distance and the total time. The total distance is two times the distance to school, 2d.s=d/t=>t=d/sWhere s is speed, d is distance and t is time. So the time taken to get to school is:d/s1and the time taken to get back is:d/s2so the total time is:d/s1+d/s2=d(1/s1+1/s2)So, as speed = distance/time, divide the total distance by the total time:2d/d(1/s1+1/s2)=2/(1/s1+1/s2)=2/(1/20+1/40)=80/3≈26.7km/hr
Parallel = same slope
f(x) = 4x + b
8 = 4(3) + b, b = -4
Equation: f(x) = 4x - 4
Using an exponential function, it is found that an appliance currently valued at $1,500 will be worth $150.17 in 8 years.
<h3>What is an exponential function?</h3>
A decaying exponential function is modeled by:
In which:
- A(0) is the initial value.
- r is the decay rate, as a decimal.
In this problem, we have that:
- The appliance is currently valued at $1,500, hence A(0) = 1500.
- It loses 25% of their resale value each year, hence r = 0.25.
Thus, the equation is given by:
In 8 years, the value will be given by:
More can be learned about exponential functions at brainly.com/question/25537936
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