When adding or subtracting two fractions with denominators that are not equal, what is the first step you take?

what would you do if you didn’t know what the values of the denominators were, such as when there are variables in the denominators? for example, what denominator would you use if you were adding 1/a and 1/b ? how would your new denominator affect the numerators?

can you come up with denominators that contain variables and aren’t equal that would require you to change only one denominator? explain.

For the first question, the first step to take when adding or subtracting two fractions with denominators that are not equal is to determine their least common denominator (LCD). This is the lowest number that is a multiple of both denominators.

For the second question, if only variables are given, you can simply multiply the two variables to obtain the LCD. However, take note that you should multiply the numerator and the denominator with the variable that would result to the same LCD for both terms. For example,

(1/a)*(b/b) + (1/b)(a/a) = (b/ab) + (a/ab) = (a + b)/ab

the equation for this situation is y=122+45. to solve the equation you would add 45 and 122 to get a total of 167lbs. in conclusion, grace's weight eight weeks ago was 167lbs.  

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 !