For first 50 miles:-
x + 9 = 50 / t where x is average speed for the last 68 miles and t = time taken for the first 50 miles.
For the second 68 miles:-
x = 68 / (3 - t)
Substitute for x in first equation:-
68 / (3 - t) + 9 = 50/t
68t + 9t(3 - t) = 50(3 - t)
68t + 27t - 9t^2 = 150 - 50t
9t^2 - 145t + 150 = 0
t = 1.111 , 15 (ignore the 15 hours as total time = 3).
so the speed for the first 50 miles = 50 / 1.111 = 45 miles per hour Answer
Answer:
3dollars
Step-by-step explanation:
easy
<h3>Given</h3>
x + 2 ≥ 6
<h3>Find</h3>
the graph for the solution
<h3>Solution</h3>
We can solve for x by subtacting 2 from both sides of the inequality.
... x + 2 -2 ≥ 6 -2
... x ≥ 4 . . . . . . . . . . simplify
The answer is read, "x is greater than or equal to 4." This means the solution is those real numbers that are to the right of 4 on the number line, and including 4 on the number line. Numbers to the left of 4 are <em>not included</em>. The inclusion of the number 4 is shown by putting a solid dot there (not an open circle).
The appropriate choice is the 3rd one.
Answer:
1005cm³
Step-by-step explanation:
8² x 3.14 = 200.96 = surface area of face
200.96 x 5 = 1004.8 = 1005cm³