Evaluate \dfrac13m-1-\dfrac12n 3 1 m−1− 2 1 nstart fraction, 1, divided by, 3, end fraction, m, minus, 1, minus, start fraction, 1, divided by, 2, end fraction, n when m=21m=21m, equals, 21 and n=12n=12n, equals, 12.

Step-by-step explanation:

Given the following expression:

You know that the value of "m" is:

And the value of "n" is:

Knowing these values, you must substitute them into the given expression:

So, in order to evaluate, the first step is to solve the multiplications and then you must reduce the fractions. Then:

Now, you must solve the subtraction.

You get that the difference (which is the result of the subtraction) is the following:

A: marigold is y = 150*(0.85)^x, sunflower is y = 125- 8x. x is month here.

b: y3 = 150*(0.85)^3 = 92 for marigold, y3 = 125-8*3 = 101

c: let 150*(0.85)^x = 125-8x, you can draw the graph and see the intersection, where i get x = 2 or 13.5.