Answer:
x =7
Step-by-step explanation:
Remark
- A geometric sequence always has terms that are separated by a common ratio. For example 3 9 27 81 243 ....
- Each term is multiplied by a common number and the term before it. In this case the common term is 3.
- To get the next term after 9, you multiply 9 by 3.
- To get the common ratio divide the second term by the first and then the third term by the second
Equation
(x + 2)/(x - 4) = (3x + 6)/ (x + 2)
Solution
I would begin this problem by taking out the common factor on the top right term. You'll see why in a second.
(x + 2)/(x - 4) = 3(x + 2)/ (x + 2) Notice the two binomials on the right cancel.
- (x + 2)/(x - 4) = 3/1 Cross multiply
- (x + 2)*1 = 3*(x - 4) Remove the brackets on the right.
- x + 2 = 3x - 12 Add 12 on both sides.
- x + 2 + 12 = 3x - 12 + 12 Simplify
- x + 14 = 3x Subtract x from both sides
- 14 = 3x - x
- 2x = 14 Divide by 2
- x = 14/2
- x = 7
The volume of a cone is:
where r is base's radius, h is cone's height.
If diameter is 9 in, then radius is 4.5 in and
Answer:
Answer:
Step-by-step explanation:
first part: 3/25
second part: 1/25
third part: 4/25
Answer:
4,250,000 riyals
Step-by-step explanation:
The total cost of drilling a 500-meter well is the sum of fixed costs (1,000,000 riyals) and variable costs.
By integrating the marginal cost function we get the variable costs function. Evaluating the variable costs function from 0 to 500 meters, gives us the total variable cost.

Total cost of drilling is:

H=v/(2pir)
You just have to isolate h. To do that you are going to divide both sides by 2pir.