All sides are defined, so we use the <em>Law</em><em> </em><em>of</em><em> </em><em>Cosines</em>. Plus, the angle opposite from side <em>a</em><em> </em>is the largest.
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69 + 2h = 84 - 3h
2h + 3h = 84 - 69
5h = 15
h = 15/5
h = 3 <=== the temps will be the same in 3 hrs
69 + 2(3) = 69 + 6 = 75
84 - 3(3) = 84 - 9 = 75
and the temps will both be 75 F <==
<span>This is decay. The exponent has a negative sign. The reciprocal of 2 is 0.5. So N(t) can be rewritten as 0.5^(t/8). The base is fraction less than 1, which is decay.</span>
Answer:
Step-by-step explanation:
B would equal to 1.5 or .5 if that is wrong i don't know
<span>3x + (x-8) = 23
Combine like terms first. You can combine 3x and x because they have the same variable.
4x - 8 = 23
Now add 8 to both sides.
4x = 31
Last step is to divide both sides by 4 to isolate the x.
4/4x = 31/4
x = 7.75 is the answer.</span>