4n - 9 = -9
Step 1. Add 9 to both sides: 4n = 0
Step 2. Divide by 4: n = 0
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Answer:
False. It is not possible for a triangle to have two right angles.
Step-by-step explanation:
Every triangle has 3 sides and, therefore, 3 angles (hence its name "tri" (three) "angle" (angles). Always, the sum of the three angles of a triangle will have a value of 180º. Therefore If two of the angles of a triangle were right, that is, they measured 90º, the third angle would be 0º, that is, it would be non-existent.Therefore, it is impossible for two angles of a triangle to be right angles.
Answer:
Step-by-step explanation:
<u>Expression:</u>
- 2∛x - 5√z + y² =
- 2∛27 - 5√64 + (-4)² =
- 2(3) - 5(8) + 16 =
- 6 - 40 + 16 =
- -18
Answer:
y = -(x + 1)² + 4
Step-by-step explanation:
y = -x² − 2x + 3
First, factor the leading coefficient from the first two terms.
y = -(x² + 2x) + 3
Complete the square.
y = -(x² + 2x + 1 − 1) + 3
Simplify and factor.
y = -(x² + 2x + 1) + 1 + 3
y = -(x + 1)² + 4
