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DedPeter [7]
3 years ago
5

Which equation shows a true proportion

Mathematics
1 answer:
Oduvanchick [21]3 years ago
8 0

Answer: the first equation is the answer.

Step-by-step explanation: As you can see the first equation is 5/7=15/21. The are proportional because 5*3=15 and 7*3=21. If they are multiplied or divided by the same number, then they are proportional. It does not work with adding, subtracting or flipping.

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Sofia purchased a new car in 2007 for$34,000. The value of the car has been depreciating exponentially at a constant rate. If th
vodka [1.7K]

Answer:

$7,718

Step-by-step explanation:

Given that :

Cost of car in 2007 = $34000

Cost of car in 2014 = $16200

Predicted value of car in 2021

Lets obtain the percentage Depreciation (d) :

Worth (A) of car in 2014 = $16200

Time (t) = 2014 - 2007 = 7 years

Initial cost (I) = price in 2007

A = I(1 - d/100)^7

16200 = 34000( 1 - d/100)^7

16200 = 34000(1 - 0.01d)^7

(16200/34000)^1/7= 1 - 0.01d

0.8995 = 1 - 0.01d

0.01d = 1 - 0.8995

d = 0.1005 /0.01

d = 10.05

Value of car in year 2021:

t = 2021 - 2007 = 14 years

A = I(1 - 10.05/100)^14

A = 34000(1 - 0.1005)^14

A = 34000(0.8995)^14

A = 34000 * 0.2269950

A =7717.83100

Approximate worth = $7718

8 0
3 years ago
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EASY 5 POINTS REALLY NEED HELP RN!!!! Which expression finds the length of side x in this right triangle?
ArbitrLikvidat [17]
Use Pythagoras:


x² = (8.5)² + (5)²


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(1) Calculate the circumference of the<br>circles below in terms of π​
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Answer:12.57

Step-by-step explanation:

C=2πr

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3 0
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Can you help me please
Ugo [173]

Answer:

√6x²×√18x²

x²√(6×18)=x²√108=2×3x²√3=6x²√3

4 0
3 years ago
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