Answer:
4√3.
Step-by-step explanation:
If the height is h then
tan 60 = h / (1/2*8)
tan 60 = h/4
h = 4 tan 60
= 4 * √3.
I'm pretty sure this is right
Ou paint 1/3 of a wall in 1/4 hour. At that rate, how long will it take you to paint one wall? rate = (area/time)
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rate = (1/3)/(1/4) = 4/3 job/hr
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time for job = 3/4 hr/job = 45 minutes to do the whole job.
Answer:
n = 2 + 2√3 and n = 2 - 2√3
Step-by-step explanation:
Let the number be n.
Then n² + 1 = 4n.
Rearranging this in proper quadratic format:
n² - 4n + 1
Here the coefficients are a = 1, b = -4 and c = 1.
Then the discriminant is b²-4ac, or (-4)²-4(1)(1) ), or 16 - 4, or 12.
By applying the quadratic formula, we find that the roots are:
- (-4) ± √12
n = ------------------
2
or n = 2 + 2√3 and n = 2 - 2√3
Answer:
x ≤ - 1
Step-by-step explanation:
2x - 8 ≤ - 10 ( add 8 to both sides )
2x ≤ - 2 ( divide both sides by 2 )
x ≤ - 1