The ninth grade class has a total of 450 students made up of x girls and y The number of girls minus twice the number of boys is 18. Find the number of girls are in the ninth grade. Which system of equations and solution represent this situation?

Multiple choice question.
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A)
x+y=450 and x−2y=18 ; There are 234 girls in the ninth grade.

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B)
x+y=450 and x−2y=18 ; There are 306 girls in the ninth grade.

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C)
x+y=450 and 2x−y=18 ; There are 156 girls in the ninth grade.

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D)
x−y=18 and 2x−y=18 ; There are 162 girls in the ninth grade.

answer: sine

step-by-step explanation:

to find the total number of combinations, multiply the quantity of each item by each other:

2 pairs of shoes x 3 pairs of shorts = 6 different combinations.

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 !