<span>Chris' average speed is 3.5mph:
Lets take Chris' brother speed = B
then Chris speed = (B+ 1) mph-------given in the question
and:
The average speed for covering 18 miles= chris' average speed + his brother's
average speed = (B+ 1) + B
since Speed = Distance covered / time taken
then average speed for 18 miles can also be found by: 18 miles/3 hours = 6 miles per hour
then we have; (B+ 1) + B = 6mph
(B +1) = (6-B)
B+B = 6-1=5
2B=5
B=5/2=2.5 mph (this is Chris' brother average speed)
Hence Chris' average speed is = B+1= 2.5+1= 3.5mph</span>
Answer:
<em>1</em><em> </em><em>second</em><em> </em>
Step-by-step explanation:
<em>16t</em><em>^</em><em>2</em><em>+</em><em>64t</em><em>=</em><em>80</em>
<em>16t</em><em>^</em><em>2</em><em>+</em><em>64t-80</em><em>=</em><em>0</em>
<em>64</em><em>^</em><em>2-4</em><em>(</em><em>16</em><em>)</em><em>(</em><em>-80</em><em>)</em>
<em>9216</em>
<em>-64-96</em>
<em>______</em><em> </em><em>=</em><em> </em><em>-5</em>
<em> </em><em> </em><em> </em><em>32</em>
<em>-64</em><em>+</em><em>96</em>
<em>_______</em><em> </em><em>=</em><em> </em><em>1</em><em> </em><em>sec</em>
<em> </em><em> </em><em> </em><em> </em><em>32</em>
H has to be a number so that when you divide it by nine it will equal nine.
Reversing this, it would look like this.
9*9=h
h=81
Answer:
Yes
Step-by-step explanation:
The line is good because it is representing the data accuratly because it is in the middle of all the data points and since all the point are near the line, it is accurate.
