Luke is drawing triangles when given three side lengths. Which of these side lengths could be the side lengths of a triangle? Choose all that are correct. A. 2 cm, 10 cm, 13 cm B. 1 cm, 10 cm, 8 cm C. 5 cm, 9 cm, 5 cm D. 3 cm, 4 cm, 5 cm E. 4 cm, 6 cm, 2 cm
I don't understand how to get the answer so if you answer could you please explain how you got your answer?

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.

35-60 students are taking math.

the terms of a geometric sequence can be found by beginning with the first term and multiplying by the common ratio repeatedly. a recursive formula for a geometric sequence with common ratio r is given by an=ran−1 a n = r a n − 1 for n≥2 n ≥ 2 .

step-by-step explanation:

x² + 11x + 18 < 0  

[-11 ± sqrt(121 - 72)]/2 = (-11 ± 7)/2  

solution: (-9, -2)

step-by-step explanation: