On solving the linear system, for the value of y = 15, the value of x is 200. The correct option is D.
<h3>What is the linear system?</h3>
It is a system of an equation in which the highest power of the variable is always 1. A one-dimension figure that has no width. It is a combination of infinite points side by side.
Given
The linear equation is shown below.

The equation can be written as

For y = 15, the value of x will be.

The value of x is 200.
Thus, option D is correct.
More about the linear system link is given below.
brainly.com/question/20379472
Answer:
Poundsis not equivalent to one of the metric units, that is WEIGHT.
R equals approximately 4/5
Answer:
66 inches
Step-by-step explanation:
1. Yards to Feet:
1 yard= 3 feet
(6 yards)(3)= 18
6 yards = 18 feet
2. Number of Groups:
30 students/6 students per group= 5 groups
3. Total String Needed:
(5 groups)x(2.5 feet string)= 12.5 feet total string
4. Remaining String:
18 feet-12.5 feet= 5.5 feet
5. Feet to Inches:
1 foot= 12 inches
(5.5 feet)(12)= 66 inches
66 inches of string will remain