Answer:
Liam's rate = 3 meters per second
Edgar's rate = 3.2 meters per second
Edgar swims faster
Step-by-step explanation:
<u>Liam:</u>
The equation 
gives the distance, d, in meters that Liam swims with respect to time, t, in seconds.
When 
When 
Rate of change:
Liam's rate is 3 metres per second.
<u>Edgar:</u>
When 
When 
Rate of change:
Edgar's rate is 3.2 metres per second.
Edgar swims faster.
Answer:
$421.10
Step-by-step explanation:
If the discount is 10%, that means the sale price is 90% of the original price.
Write the equation that represents that:
378.99 = 0.9x. Solve for x. Divide both sides by 0.9
378.99/0.9 = 421.10
That is the price before the discount and tax.
We conclude that the solution to the given linear equation is x = 15/13.
<h3>
How to solve that equation for x?</h3>
Here we have the linear equation:
13x - 4 = 11
And we want to solve this for x. To do so, we need to isolate x in one side of the equation.
We can start by adding 4 in both sides, so we get:
13x - 4 + 4 = 11 + 4
13x = 15
Now we can divide both sides by 13, so we get:
13x/3 = 15/13
x = 15/13
We conclude that the solution to the given linear equation is x = 15/13.
If you want to learn more about linear equations:
brainly.com/question/1884491
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