Mary’s grade on her research paper counts for 20% of her final grade in english. if there are a total of 400 points possible how many points can she earn for her research paper

80 points

Step-by-step explanation:

Total percentage is always 100%

Total points is 400

The research paper has a weight of 20% of the total (which is 400 points).

The highest possible points is 20% of 400

First, we need to convert percentage to decimal by dividing by 100. Then we will multiply that decimal with 400. Shown below:

20% = 20/100 = 0.2

Now,

0.2 * 400 = 80 points

So, she can earn 80 points for her research paper

yes. we do proportions in probabilities.

x= -3 and

step-by-step explanation:

to find the roots of a cubic, use division or factoring to find the factors then set equal to 0. as this is a difference of cubes, it factors into

where a is the cube root of .

here   this is 27 and the cube root of 27 is 3. so we write using the form:

.

set each factor to 0 and solve for x.

x-3=0

x=3

the quadratic expression does not factor and must be solved using the quadratic formula.

where a = 1, b=3, and c=9

this cubic has two complex roots.