It should be the answers c
According to the solving the perimeter of the given triangle is:
= -x³ + 13x² + 11x + 20
<h3>Describe the triangle:</h3>
Three edges and three vertices make up a triangle, which is a polygon. It is among the fundamental shapes in geometry. Triangle ABC refers to a triangle with the vertices A, B, and C. In Euclidean geometry, any three points that are not collinear determine a singular triangle and a singular plane at the same time.
<h3>What is the formula for the triangle's perimeter?</h3>
Simply summing the lengths of all the sides of a triangle yields its perimeter. A + B + C is the basic formula to determine the perimeter of a triangle with sides "a," "b," and "c."
<h3>According to the given data:</h3>
A = 9x+10x²-x³
B = -x² + 9x + 12
C = 4x²-7x+8
We know that the perimeter of the triangle is sum of all side of the triangle:
A+B+C
= (9x+10x²-x³) + (-x² + 9x + 12)+(4x²-7x+8)
= -x³ + 13x² + 11x + 20
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If there are 18 students every one of the will pair up with 17 other students throughout the year so the total amount of pairs that can be made is 18x17=306 but since it’s not important if student A is paired with student B or student B with student A we should divide the total amount of pairs by two- 306:2=153 so in total there will be 153 projects finished
Answer:
140.04
Step-by-step explanation:
(4.89+5.68+8.91+9.22+6.31)*4 = 140.04
