C. −6, is the best option
Ht of ceiling = 10 ft which is two-thirds of living rm ceiling
Ht of living rm ceiling = 2/3x = 10 ft
2/3h = 10 ft
2/3h times 3/2 to solve for h = 10 times 3/2
h = 30/2
h = 15 ft
Step-by-step explanation:

First, let's distribute the
variable to each term in the first parenthesis:

Next, let's distribute the
variable to each term in the second parenthesis:

Next, let's group like terms together:

Finally, let's add or subtract like terms to get the result:

Step-by-step explanation:
2 × 10⁸ - 7 × 10⁷
= 200,000,000 - 70,000,000
=130,000,000
= 1.3 × 10⁸
Answer:
$20
Step-by-step explanation:
49 is the outlier