the rates of change will be 210. if the change is after 8 hours than the rate of change will be 105
Answer:
-1
Step-by-step explanation:
-2 divided by 2 = -1.
A negative divided by a positive equals a lesser negative.
R2(<span>cos2</span>ϕ−<span>sin2</span>ϕ)−2rcosϕ=0<span><span>r2</span>(<span>cos2</span>ϕ−<span>sin2</span>ϕ)−2rcosϕ=0</span>
<span><span><span>r2</span>cos<span>(2ϕ)</span>−2rcosϕ=0</span><span><span>r2</span>cos<span>(2ϕ)</span>−2rcosϕ=<span>0
Now </span></span></span> divide through by <span><span>r≠0</span><span>r≠0</span></span>
and get
<span><span>rcos<span>2ϕ</span>−2cosϕ=0</span><span>rcos<span>2ϕ</span>−2cosϕ=0</span></span>
or
<span><span>r=2<span><span>cosϕ</span><span>cos<span>2ϕ</span></span></span></span><span>r=2<span><span>cosϕ</span><span>cos<span>2<span>ϕ</span></span></span></span></span></span>
Answer:
x= 45
Step-by-step explanation:
2x+x + 45 = 180
Combine like terms
3x+45 =180
subtract 45 from each side
3x+45-45= 180-45
3x = 135
Divide each side by 3
3x/3 = 135/3
x = 45
Answer:
$308, $294, large
Step-by-step explanation:
294 is less than 308, so the large is the better deal
