Okay, we know the price of the child's ticket (x), which is 5.75 dollars less than the adult's ticket.
Let's say that the price of the adult's ticket is a. Since the child's ticket is 5.75 less that the adult's ticket, we can write it this way:
a = 5.75 + x
Answer:
$3474.25
Step-by-step explanation:
Use the compound amount formula A = P(1 + r)^t. Here r is the rate as a decimal fraction and is -0.15. t represents the number of y ears. P is the initial value of the car.
Then: A = ($15,000)(1 - 0.15)^9, or
A = ($15,000)(0.85)^9 = $3474.25
<span>Read the problem.Begin by reading the problem carefully. Don’t jump to any conclusions about the answer until you understand the problem.<span>Identify and list the facts.Look at all the information given in the story problem and make a list of what you know.</span><span>Figure out exactly what the problem is asking for.Know what you’re trying to find. The problem often states the required answer, but sometimes you have to ferret it out from the information given. If an important fact isn’t there, you can often convert some piece of the given information.</span><span>Eliminate excess information.The problem may include facts that don’t help you find the solution, so clear them out of the way.</span><span>Pay attention to units of measurement.For example, if dimensions are given in inches, but the answer must be in square feet, you need to convert units. You can use a table of conversions, an online calculator, or your own memory to get the conversion factors.</span><span>Draw a diagram.Sometimes a diagram helps you visualize the problem (but not always).</span><span>Find or develop a formula.When you see the math that needs to be done, you probably know a common math formula to use for the computation. You will find that you use some special formulas again and again.</span><span>Consult a reference.If you’re stuck, look for a reference of some kind, such as a conversion chart or even a blog where someone has encountered the same problem you’re having (although as always, consider Internet sources carefully).</span><span>Do the math and check your answer.After you have an answer, be sure to test it. If the result is outrageously high or low, verify whether you made a mistake.</span></span>
Answer:
current value = 21000(1 - 0.05)^n
Step-by-step explanation:
This is a standard depreciation formula where n is the number of years.
One Way:
We can change the mixed number to a decimal for comparing.

m =

m = 1.25 m
1.4 m > 1.25 m
Darren > Luke
Darren's jump was higher by (1.4-1.25)
0.15 m
Or another way change the decimal to a fraction and the mixed to an improper fraction too.

=

(Luke)
1.4 =

(Darren)
We need a common denominator to compare

(Luke)

(Darren)

(Luke)

(Darren)

Darren > Luke
By:

-

=

Which is also by
0.15 m
Darren jumps higher and by 0.15 m