Step-by-step explanation:
AC=AB+BC-cos. AC=100+66-cos. AC=166-0.906. AC=√165.094. AC=12.8
Answer:
10 hours
Step-by-step explanation:
We can write a ratio to solve
45 pages 300 pages
---------------- = -------------------
1.5 hours x hours
Using cross products
45x = 1.5(300)
45x =450
Divide by 45
45x/45 = 450/45
x = 10
10 hours
B is the image of d
B is the image of e
C is the image of d
Xy = 940
<span>and </span>
<span>Cost = 5(2x) + 5y + 10y (I chose y to be the side with brick). The cost equation simplifies to: </span>
<span>C = 10x + 15y </span>
<span>Replace y in the cost equation with 940/x: </span>
<span>C = 10x + 15(940/x) </span>
<span>C = 10x + 14100/x <---this is the equation you need to minimize. </span>
<span>C' = 10 - 14100/x^2 </span>
<span>10 - 14100/x^2 = 0 </span>
<span>14100/x^2 = 10 </span>
<span>x^2 = 14100/10 = 1410 </span>
<span>x = sqrt(1410) = 37.55 </span>
<span>y = 25.03 <---this is the length of the brick fence.</span>
Answer:
the y is 3 not -3 he did 1/3x not just x. the slope and the y axis are wrong
Step-by-step explanation:
