By rewriting the equation from step 1 substituting the value of k into it, the value of x is 22.5
A direct variation is a type of variation that has two types of variables in which a variable can be expressed in terms of the other with its constant.
For example;
If x varies directly as y
<h3>Step 1:</h3>
Then
- x
y - x = ky ; where k is constant
<h3>Step 2:</h3>
The original question says:
- if x varies directly as y, and x = 9 when y = 6, find x when y = 15
∴
x = ky
9 = k × (6)
k = 9/6
k = 1.5
<h3>Step 3:</h3>
Now, we can rewrite the equation from step 1 substituting the value of k into it:
∴
x = ky
The value of (x) will be:
x = 1.5 (15)
x = 22.5
Learn more about Direct variation here:
brainly.com/question/25798903
Answer:
They use a control group.
Hope this helps :)
Based on the excerpt, President Jimmy Carter made reference to the meeting he had with various leaders on the energy crisis.
<h3>What is a state crisis?</h3>
A state crisis can be defined as any form of event that has the potential of causing an unstable and dangerous situation across a country, thereby, adversely affecting the people that are living within it.
In this scenario, the United States of America had an energy crisis while Jimmy Carter was the president. Thus, President Jimmy Carter gave a speech on the 15th of July, 1979 to address the citizens of the United States of America on their energy crisis through a live TV broadcast.
Read more on Jimmy Carter here: brainly.com/question/23775670
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