1) 90% round to the thousands place
1 answer:
You might be interested in
Answer:
The quadratic equation in terms of v is v² + 2 v + 180 = 0
Step-by-step explanation:
Given as :
The distance between house to the school = d = 6 km
The uniform speed = v km/h
So, Time =
or, t =
Or, t =
<u>Now, Again</u>
The speed is increase by 2 km/h
i.e speed = (v + 2) km/h
So, Time taken = t' = (t - )hours
i.e t' = (t - )hours
Now, Time =
So, (t - ) =
Or, (t - ) =
Or , -
=
Or , =
Or, (90 - v) × (v + 2) = 6 × 15 v
Or, 90 v - 180 - v² - 2 v = 90 v
Or, v² + 2 v + 180 = 90 v - 90 v
Or, v² + 2 v + 180 = 0
So, The quadratic equation in terms of v
v² + 2 v + 180 = 0
Hence The quadratic equation in terms of v is v² + 2 v + 180 = 0 Answer
Step 1. Simplify 
to 
Step 2. Simplify to 
Step 3. Simplify
to 
Step 4. Cancel
on both sides
Step 5. Multiply both sides by
(the LCM of 
)
Step 6. Expand
Step 7. Subtract
from both sides
Step 8. Simplify
to 
Step 9. Multiply both sides by
Done! :) Hope this helps! :)
Step 2. Simplify
Step 3. Simplify
Step 4. Cancel
Step 5. Multiply both sides by
Step 6. Expand
Step 7. Subtract
Step 8. Simplify
Step 9. Multiply both sides by
Done! :) Hope this helps! :)