Answer:
A triangles angle always equal to 180 degrees. So if you add up what you already have which is 80+40=120
Answer:
plz mark as brainliest
Step-by-step explanation:
$7.9
Answer:
m = ± 
Step-by-step explanation:
m² = n ( take square root of both sides )
m = ±
<h3>Slopes of perpendicular lines.</h3>
Let k: y = a₁x + b₁ and l: y = a₂x + b₂. Then
<h3>k ║ l ⇔ a₁ = a₂</h3><h3>k ⊥ l ⇔ a₁ · a₂ = -1</h3>
We have the line y = -x + 5 ⇒ a₁ = -1.
Therefore
a₂ · (-1) = -1
-a₂ = -1 I<em>change the signs</em>
<h2>a₂ = 1</h2>
Answer:
Step-by-step explanation:
Answer:
The greatest of the integers is 129 (C).
Step-by-step explanation:
Let x be the first integer.
x + (x + 2) = 256
2x + 2 = 256
2x = 254
x = 127
127 + 129 = 256
