Samantha measured two of the angles in Triangle P Q R and found that they had measures of 65° and 70°. Then, she measured two of the angles in Triangle X Y Z and found that they had measures of 65° and 45°. What statement best describes the two triangles? The two triangles cannot be congruent because the angle measures are not the same.

The two triangles are congruent because the angle measures in the two triangles are the same.

The two triangles may be congruent, but additional information is needed about the third angle in each triangle.

The two triangles may be congruent, but additional information is needed about the sides of each triangle.

use substitution to solve each system of equations. y = x + 5 3x + y = 25 62/87,21 y = x + 5 3x + y = 25 substitute x + 5 for y in the second equation. substitute the solution for x into either equation to find y. the solution is (5, 10)

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step-by-step explanation:

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.