Westonci.ca is the premier destination for reliable answers to your questions, provided by a community of experts. Get immediate answers to your questions from a wide network of experienced professionals on our Q&A platform. Explore comprehensive solutions to your questions from a wide range of professionals on our user-friendly platform.
Sagot :
Let's just make up some variables.
D = Donatello's age in 2005, L = Leo's
(D + 9) = Donatello's age in 2014.
D = 11L + 1
(D + 9) = 3(L + 9) + 7
We need to get one variable on its own in both equations to use substitution:
D = 11L + 1
D + 9 = 3(L + 9) + 7
D + 9 = 3L + 27 + 7
D = 3L + 27 + 7 - 9
D = 3L + 25
Now we can substitute 3L + 25 for D in the other equation to solve for L.
D = 11L + 1
3L + 25 = 11L + 1
24 = 8L
L = 3
Use L = 3 in an earlier equation to find D.
D = 11L + 1
D = 11*3 + 1
D = 33 + 1
D = 34
Now we know that in 2005, Leo was 3 and Don was 34.
In 2005, Leo was 3 -- true
In 2005, Don was 23 -- fasle
In 2014, Leo was 15 -- fasle (3+9=12)
In 2014, Don was 43 -- true (34+9=43)
Leo is older than Don -- false
Don is older than Leo -- true
D = Donatello's age in 2005, L = Leo's
(D + 9) = Donatello's age in 2014.
D = 11L + 1
(D + 9) = 3(L + 9) + 7
We need to get one variable on its own in both equations to use substitution:
D = 11L + 1
D + 9 = 3(L + 9) + 7
D + 9 = 3L + 27 + 7
D = 3L + 27 + 7 - 9
D = 3L + 25
Now we can substitute 3L + 25 for D in the other equation to solve for L.
D = 11L + 1
3L + 25 = 11L + 1
24 = 8L
L = 3
Use L = 3 in an earlier equation to find D.
D = 11L + 1
D = 11*3 + 1
D = 33 + 1
D = 34
Now we know that in 2005, Leo was 3 and Don was 34.
In 2005, Leo was 3 -- true
In 2005, Don was 23 -- fasle
In 2014, Leo was 15 -- fasle (3+9=12)
In 2014, Don was 43 -- true (34+9=43)
Leo is older than Don -- false
Don is older than Leo -- true
Answer:
the answer is A, D, and F..........i think
Step-by-step explanation:
We hope our answers were useful. Return anytime for more information and answers to any other questions you have. Thank you for choosing our platform. We're dedicated to providing the best answers for all your questions. Visit us again. We're dedicated to helping you find the answers you need at Westonci.ca. Don't hesitate to return for more.