Answer:
The boy: 8 years old
The sister: 11 years old
Explanation:
We assume that the age at present of the boy is x (years old).
As he is younger than his sister 3 years, so that his sister's present age is great than x 3 years
=> Her present age is: x + 3 (years old)
Two years ago, the boy is younger than present two years
=> The boy's age two years ago is: x - 2 (years old)
Similarly, the sister's age two years ago is: (x+3)-2 = x + 1 (years old)
As given, two years ago he was two-thirds of his sister's age, so that we have:
<em>The boy's age two years ago = </em>
<em> × the sister's age two years ago</em>
⇒ 
⇒ 
⇒ 
⇒ 
⇒ 
=> x + 3 = 8 + 3 = 11
So the present age of the boy is 8 years old, of the sister is 11 years old
Answer:
Kindly see attached organized table for clarity.
Item cash Net income
a Purchase of Supplies of cash -$133 -
b Adjusting entry for use of supplies - -$31
c Made sales on account - $1,297
d Received cash from customer on acct $865 -
e Purchased equipment for cash -$2,528 -
f Depreciation of building to be recorded - -$610
Answer: Economics studies the behaviour of human beings when there is scarcity and choices have to be made.
Explanation:
Economics is a social science i.e study of human behavior in relation to the manufacturing, distribution and consumption of products. Economics focal point is the interaction and behaviour of economic agents (households, firms and governments) and how economies work.
Economics is divided into microeconomics and macroeconomics. Microeconomics deals with the small elements in the economy such as interaction of markets and prices of certain products. Macroeconomics deals with the whole economy and issues discussed include unemployment, economic growth, inflation etc.
Because the banks were down
Answer:
The options are given below:
A) competitively exclude other predators.
B) prey on the community's dominant species.
C) allow immigration of other predators.
D) reduce the number of disruptions in the community.
E) prey only on the least abundant species in the community.
the correct option is B
Explanation:
Keystone species refers to a predator which prevents a particular herbivorous species from wiping out the dominant plant species. If the number of prey are low, the keystone predators can be less abundant and still be effective. Keystone species have a disproportionately large effect on its environment relative to its abundance.
Therefore, by preying on a community's dominant species, keystone predators help to maintain the species diversity in the community, because they ensure that the dominant predators do not totally wipe out the various organisms present in the ecosystem.