Answer:
a Euclidean space, the sum of angles of a triangle equals the straight angle (180 degrees, π radians, two right angles, or a half-turn). A triangle has three angles, one at each vertex, bounded by a pair of adjacent sides.
Answer:
<h2>B. 2x + y = 4</h2>
Step-by-step explanation:
Having the system of equations in its simplest form

If

then the system of equations has infinitely many solutions.
If

then the system of equations has no solution.
If

then the system of equations has one solution.
We have the equation

Convert to the standard form Ax + By = C<em>:</em>
<em />
<em> add 2x to both sides</em>

Answer:
Step-by-step explanation:
Hello, please consider the following.

Thank you
Rearrange the equation by writing
x² + x - 90 = 0
x² + x = 90
x² + x + 1/4 = 90 + 1/4
Recall that (a + b)² = a² + 2ab + b². Then
x² + 2 • x/2 + (1/2)² = 361/4
(x + 1/2)² = 361/4
x + 1/2 = ± √(361/4)
x = -1/2 ± 19/2
x = 9 or x = -10