2x+15=4x-1
16=2x
8=x
hope this helps!
Answer:
A. No
Step-by-step explanation:
the point (2, 9) means x = 2 and y = 9.
plug this into the equation:
9 = -5 * 2 + 1
9 = -10 + 1
9 = -9
Not true, this is not a solution
The equation of a direct variation is of the form

But the given function can be rewritten as

This is a partial variation,

is the constant of variation and

is the fixed constant.
The number is
OR 
Step-by-step explanation:
The reciprocal of a number means
- Switch the numerator and the denominators of the number
- The product of a number and its reciprocal is 1
- The reciprocal of n is
Assume that the number is x
∵ The number is x
∴ Its reciprocal is
- Add the number and its reciprocal and equate the sum by
∵ 
- Change the mixed number to an improper fraction
∵ 
∴
- Multiply the two sides by x
∵ 
∵ 
∵ 
∴ x² + 1 =
x
- Subtract both sides by
x
∴ x² -
x + 1 = 0
Now use your calculator to solve it and find the values of x
∴
and 
To check your answer add the number to its reciprocal the answer must be
∵
∵
The number is
OR 
Learn more:
You can learn more about the numbers in brainly.com/question/10736268
#LearnwithBrainly