Step-by-step explanation:
The total degrees is always 360. So whe get 360=180+3x. 360-180=3x. 180=3x. x=60. I don't know how you're supposed to get 84 degrees.
Answer:
n =95
Step-by-step explanation:
The angles of a triangle add up to 180 degrees
55+ 30 +n = 180
Combine like terms
85+n = 180
Subtract 85 from each side
85-85 +n = 180 -85
n =95
X/2 - 6 = 15
x/2 -6 +6 = 15 + 6
x/2 = 21
x/2 × 2 = 21 × 2
x = 42
Check
42 ÷ 2 - 6 = 15
42 ÷ 2 = 21 -6 = 15
12 = x² - x
12 - 12 = x² - x - 12
0 = x² - x - 12
x² - x - 12 = 0
x = <u>-(-1) +/- √((-1)² - 4(1)(-12))</u>
2(1)
x = <u>1 +/- √(1 + 48)</u>
2
x = <u>1 +/- √(49)
</u> 2
x = <u>1 +/- 7</u>
2
x = 0.5 +/- 3.5
x = 0.5 + 3.5 x = 0.5 - 3.5
x = 4 x = -3
<u />
Answer:
y = - 
Step-by-step explanation:
Given that the quantities vary inversely then the equation relating them is
y =
← k is the constant of variation
To find k use the condition x = 4 when y = - 6
k = yx = - 6 × 4 = - 24
y = -
← equation of variation