5x + 7 is a algebraic expression. it is a mathematical phrase that includes at least one variable and one operation. what is the variable

x is the variable

Step-by-step explanation:

The variable is the letter in the expression

x is the variable

5 is the coefficient of the variable

7 is the constant

answer: the answer is one of

step-by-step explanation:   we are given to write a proper fraction where the whole is divided into an even number of equal parts less than ten, and an odd number of those parts exist.

an even number less than 10 may be one of 2, 4, 6 or 8. so, the whole may be one of these four evens.

now, an odd number of these parts must exist, so the numerator must be an odd number, one of 1, 3, 5 or 7. it cannot be 9 because then the fraction will become improper.

thus, our fraction may be one of the following

the correct answer is the second option