Question
solve the problem by multiplying first.
a clothing store is having a sale on shirts and jeans. four shirts and two pairs of jeans cost $68. three
s 4s + 2) = 68
shirts and three pairs of jeans cost $81. the system of equations 3s + 3) = 81 models this
situation, where s is the cost of a shirt and is the cost of a pair of jeans. how much does one shirt an
one pair of jeans cost?
one shirt costs
and one pair of jeans cost $
.

A shirt cost $7 and a jean cost $20

From the question given, we have already been given the equations which are:

4s + 2j = 68 equation i

3s + 3j = 81 equation ii

Multiply equation i by 3

Multiply equation ii by 4

12s + 6j = 204 equation iii

12s + 12j = 324 equation iv

Subtract iii from iv

6j = 120

j = 120/6

j = 20

A jean cost $20

We can then calculate the value of the shirt and this will be:

4s + 2j = 68

4s + 2(20) = 68

4s + 40 = 68

4s = 68 - 40

4s = 28

s = 28/4

s = 7

A shirt cost $7

Therefore, a shirt cost $7 and a jean cost $20

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Step-by-step explanation:

4s + 2j = 682j = -4s + 68j = -2s + 34

3s + 3j = 81

3s + 3(-2s + 34) = 81

3s - 6s + 102 = 81

3s - 6s = 81 - 102

-3s = - 21

s = -21/-3

s = 7 < shirts cost 7 bucks

j = -2s + 34

j = -2(7) + 34

j = -14 + 34

j = 20 < jeans cost 20 bucks

c

step-by-step explanation:

i think because what else can be a sample of every member

the population of other specie of birds will decline or other specie of birds will find some alternate source of food to survive.

explanation:

according to the competitive exclusion principle, which is also known as gause's law, two specie living in the same niche and feeding on the same resource cannot co-exist stably.

as we have well studied the theory of natural selection which states that only those organisms survive which have better tendency to compete for food and adapt to the environmental conditions.

coming towards the question, what wi ll happen when one species outcompetes the other for the small fish , the other specie will not get enough food and will start to die or decline in population. eventually either other specie needs to find another alternative food source for itself or migrate at some other location where there is less competition otherwise it will just not exist anymore at that niche.

hope it !