Answer:
Speed = 20 mi/h
Explanation:
There are two points A and B
Distance between both the points are define with function -20t + 45 miles
where t represent the number of hours of travelling.
Now firstly we find the initial position. At starting time is 0, so we put t=0 in given function of t.
At t=0;
d₀ = -20(0) + 45 = 0 + 45 = 45 miles
Now we find the distance travell after starting first hour.
Than we put t = 1 in the given function
At t = 1;
d₁ = -20(1) + 45 = -20 + 45 = 25 miles
Difference between d₁ & d₀ is
45 - 25 = 20 miles
We see that in one hour, total distace is covered 20 miles
Now we use time, speed, distance relation
Speed = 
S = 
S = 20 miles/hour
That's the final answer.
I hope it will help you.
Answer:
3 + x
the difference of x and 8
Step-by-step explanation:
u need a number, a varible(letter), and a [+, -, /, x(*)]
Answer:
1,530 people
Step-by-step explanation:
First do 0.085 times 600 to get 51 (this stands for 51 new ppl per year)
Second Do 51 times 30 to get 1,530
1,530 will stand for infected ppl of this disease in 30 years
Answer:
Ext=2x
Int=7x
Int+ext=180
2x+7x=180
9x=180
x=20
Ext=2×20=40
No of sides =360/40
=9 sides.
I hope this helped you
Step-by-step explanation:
Answer:
Hi where are options of question