X=2
So you solve for x by simplifying bath sides of the equation, then all you do is isolate the variables
Answer:
12.5
Step-by-step explanation:
hope it helped
Answer:
Your answer would be .
Step-by-step explanation:
The formula for the equation of a circle is , where (h, k) is the center of the circle, and r is the radius. Since the center is (-1, 3), the left half of the equation is . Now, all we have to do now is find the radius, r. To do that, you can use the distance formula to find the distance between the center (-1, 3) and a point that passes through the circle, or is on the circumference, (-4, -2). When you calculate that, you will get , so the radius is . But, we want the radius squared, which is 34. So, the final answer is what I wrote above.
Hope that helped! :)
Let the speed of first car be x mph
the speed of the second one is (x+3) mph
Relative speed=x+x+3=(2x+3) mph
but
time=distance/speed
thus
3=(261)/(2x+3)
solving for x we get:
3(2x+3)=261
6x+9=261
6x=261-9
6x=252
hence:
x=42 mph
Thus the average speed of first car is 42 mph
Average speed of the second car is (42+3)=45 mph