1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Andreas93 [3]
2 years ago
15

John is 3 years older than Jim. Jim is 4 years less than half of Dana’s age. How old is each person if their ages add up to 167?

Biology
1 answer:
Andreyy892 years ago
3 0
Let’s say John’s age is x. Jim’s age is y. And Dana’s age is z. Then the equation would be:
1.) x + y + z = 167.
We also know that John (x) is 3 years older that Jim (y), so we can make the equation:
2.) y + 3 = x
We know that Jim (y) is 4 years younger than half of Dana’s age (z), so we can make this equation:
3.) z/2 - 4 = y
Now we can combine these equations so that we only have one variable remaining.
The second and third equation can combine to create:
4.) (z/2 - 4) + 3 = x
Then combine the first, third, and fourth equations to have only z as a variable.
5.) ((z/2 - 4) + 3) + (z/2 - 4) + z = 167
Simplify the fifth equation by isolating the variable:
z = 86
Dana’s age is 86. Now plug this into the remaining equations.
86/2 - 4 = 39
Jim is 39. Plug this number into the second equation.
39 + 3 = 42.
John is 42.

FINAL ANSWER:
John = 42
Jim = 39
Dana = 86
You might be interested in
Antibiotics are medicines that kill or slow the growth of this type of organisim
matrenka [14]
Bacteria ...........
5 0
2 years ago
6. Soils are to be considered a "living" organism, although it is an abiotic factor. The slide on soil
PtichkaEL [24]
Dhdibsbshsisnebdifidhudiehehfjfd
7 0
2 years ago
Tony weighs 180 pounds on the surface of the Earth. If Tony travels to the Moon, his weight will be about 30 pounds.
n200080 [17]
D- weight is a measure of the force of gravity on objects
8 0
2 years ago
Read 2 more answers
PLEASE HELP WILL GIVE BRAINLIEST
goldenfox [79]

Answer:

b. more rapidly reproducing and growing

8 0
2 years ago
Read 2 more answers
The part of the cell that act like your skin is the
kipiarov [429]

Answer:

A

Explanation: The membrane acts like a shield for the cell to keep it safe. A plant cell has a cell membrane AND a cell wall but an animal cell ONLY has a cell membrane. It also filters what can go in and out of the cell. Hope this helps(:

3 0
3 years ago
Read 2 more answers
Other questions:
  • Knowing the type of food consumed by an organism helps to identify the role of the organism in the community. This role is known
    13·1 answer
  • Which of the food ingredient is important for brain development? glucose dha folic acid sucrose?
    12·1 answer
  • The biosphere:
    7·2 answers
  • if there were no suppression of dna replication between meiotic divisions but cytokinesis proceeded normally, what is the most l
    6·1 answer
  • Glucose and hexanoic acid each contain six carbon atoms, but they have completely different properties. Glucose is a nutrient fo
    9·1 answer
  • What affects has breast cancer research had on society?
    11·1 answer
  • These two images show the evolutionary relationship between humans and chimpanzees. Which chart more accurately depicts the proc
    9·2 answers
  • An atom that gain or loses an electron has a net eletric charge and is called a/n
    6·1 answer
  • Which number is labeling the part of the digestive system that absorbs the nutrients from digested food into the blood?
    9·2 answers
  • Give reasons why local efforts are required to conserve biodiversity​
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!