What is a real number that can be written as a ratio or fraction

What is the value of x in the diagram below?

Nine more than four times a number is the same as one less than twice the number. find the number?

Rachel is studying the population of a particular bird species in a national park. she observes every 10th bird of that species that she can find in the park. her conclusion is that the birds living in the park who belong to that species generally feed on insects. rachel's sample is . based on the sample she picked, rachel's generalization is . reset next