Examine this system of equations. what integer should the first equation be multiplied by so that when the two equations are added together, the x term is eliminated? 1/18x + 4/5y = 10 -5/6x - 3/4y = 3

Hey there!

To find this, we should figure out what 1/18 can be multiplied by to get 5/6, because when we end up adding them together after multiplying, 5/6x - 5/6x eliminates x.

One thing that would make this easier is to make 1/18 and 5/6 have the same denominator.

6 goes into 18 3 times, so what we could do is multiply both the numerator and denominator of 5/6 by 3.

That gives us 15/18.

Now that we have the denominators the same, we can see that 1/18 goes into 15/18 15 times by comparing the numerators.

This means the first equation should be multiplied by 15.

Hope this helps!

step-by-step explanation:

sry but any answer choices

the answer is; biodiversity resulting from few ancestors

adaptive radiation occurs when a population is subjected to a large natural environment with spatial ecological variations. the parts of the population in the different ecologies begin to adapt to their local environments. due to non-random mating across the large populations, this causes the different populations from the large population to speciate within their local environments. they, therefore, diverge to different species sharing a common ancestor.