Answer:
$14 per lb
Step-by-step explanation:
Given:
Let x be the price per lb of brand X coffee
3 lbs of brand X coffee + 9 lb of brand Y coffee = 12 lbs of special blend
⇒ 3x + 9(18) = 12(17)
⇒ 3x + 162 = 204
⇒ 3x = 42
⇒ x = 14
Therefore, brand X costs $14 per lb
$14/lb
Explanation:
Price of brand X be "q"
Price of brand Y be "t"
X-intercept is (-3,0)
Y-intercept is (0,-7)
(A)= 0
(B)= 1/9
(C)= 1/36
12.7 cm
ABC
12² = 6² + BC²
12² - 6² = BC²
144 - 36 = 108
CB² = 108
√108 = 10.392
CB = 10.392
CBD
Sin (55°) = CB / CD
0.81915 = √108 / CD
CD = 10.392 / 0.81915
CD = 12.686
CD = 12.7cm