Answer:
<h2><u><em>
-3x + 9</em></u></h2>
Step-by-step explanation:
(6x + 14) - (9x + 5) =
6x + 14 - 9x - 5 =
<u><em>-3x + 9</em></u>
$300 because 300x2=600 then 75x8=300 and 600+300=900
Given that y=kx
After substituting any of the given values, we will get constant k as -0.75 or -3/4
So the answer is B. -3/4
Average speed of the entire journey is 3.08 km/hr
Step-by-step explanation:
- Step 1: In the first half, given that the speed = 4 km/h and time = 2 1/2 = 2.5 hrs. Calculate the distance covered.
Distance = Speed × Time = 4 × 2.5 = 10 km
- Step 2: In the second half, given that speed = 2 1/2 = 2.5 km/hr and time = 4 hrs. Calculate the distance covered.
Distance = 2.5 × 4 = 10 km
- Step 3: Calculate average speed.
Average Speed = Total distance/Total time
= 10 + 10/2.5 + 4 = 20/6.5
= 3.08 km/hr
