To overtake his father in 5 hours, who started 2.5 hours earlier, James will need to travel at an average speed of 36 mph.
This is a relative speed problem in physics. The father departs first and travels for a total of 7.5 (5+2.5) hours at a speed of 24 mph. Therefore, Mr. Johnson travels a total distance of 180 (24 * 7.5) miles. James leaves 2 1/2 hours after his father and needs to cover the same distance in 5 hours to overtake him. Therefore, by dividing the total distance (180 miles) by the time (5 hours), we find that James needs to travel at 36 mph to overtake his father.
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Answer: Im pretty sure its x = 4.472135955
Step-by-step explanation:
DISCLAIMER: I may be wrong I am kind of rusty.
You got to use the Pythagorean theorem (a^2 + b^2 = c^2) to answer this.
First you label your triangle by putting the hypotenuse as "c" the other known value as "b" and the unknown value as "a".
Now you input the answers into the equation.
x^2 + 4^2 = 6^2
Now answer the known values.
x^2 + 16 = 36
Now subtract by 16 to get rid of the sixteen.
x^2 + 16 -16 = 36 -16
x^2 = 20
Now to get rid off the ^2 find the square root.
x = 4.472135955
x= -66/19
Multiply 2 on both sides:
2*(5x+6)/2=3(4x+12)*2
Simplify:
5x+6=24x+72
Subtract 6 from both sides:
5x+6-6=24x+72-6
Simplify:
5x=24x+66
Subtract 24x from both sides:
5x-24x=24x+66-24x
Simplify:
-19x=66
Divide both sides by -19
-19x/-19=66/-19
Simplify:
x= -66/19
cos X
sin X
sin Z
Answer:
sin X
Step-by-step explanation:
sin X = = =
B. False