A variable expression is a group of numbers, variables and operations.

The expression 37 - 4x+ 5 has numerals, operation symbols and a variable.

It is a variable expression.

A co-efficient is the multiple of a variable.

In the expression, there is only one variable, x.

The co-efficient of x in the expression is 3.

The given expression is " Sum of n and 6".

Amongest the choices, the equivalent expression to "sum of n and 6 is n + 6.

Amongest the choices equivalent expression to "thrice as long as h" is 3h.

Number of marbles in 10 rows = number of marbles in each row × number of rows

= m × 10.

So, there are 10 × m marbles in 10 rows.

Number of bags of chips each child gets = total number of bags of chips ÷ number of children

= n ÷ 12

So, each child gets n ÷ 12 number of bags of chips.

Let n be the number of milk cartons still left to be sold.

The number sentence can be given as, (Number of milk cartons already sold) + n = Number of milk cartons that Eric sells per day.

15 + n = 55

So, the number sentence used to calculate the number of milk cartons left to be sold is, 15 + n = 55.

Let n be the money required more to buy the pencil and the calculator.

The number sentence can be given as, (Money that Mark has) + n = Cost of a pencil and a calculator.

$17 + n = $20

So, the number sentence used to calculate the money required more to buy them is, $17 + n = $20.

Let n be the money left with David.

n + (Money spent) = (Money David makes in a week).

n + $54 = $165

So, the number sentence used to calculate the money left with David is, n + $54 = $165.

Let n be the number of candies left in the bag.

The number sentence can be written as, (Number of candies in the bag) = n + (Number of candies eaten).

8 = n + 4

So, the number sentence used to calculate the number of candies left in the bag is, 8 = n + 4.

- 12x³ + 7x² + 5x - 17

A constant term is said to be the one which has no variables in it.

Therefore, - 17 is the constant term in the polynomial - 12x³ + 7x² + 5x - 17.

In an expression, for a term which has no literal factors is known as a constant term.

In - 2x³ + 7x² + 5x + 17. the term 17 does not have any literal factors.

So, in the given polynomial 17 is a constant term.

Each term in an algebraic expression are separated by plus (+) or minus (-) symbol.

So, there are 3 terms in the algebraic expression 4pq + 2p - 3pq².

A variable expression is an expression that has numerals, operation symbols and variables.

Amongst the choices "6 - 2a" has numerals, operation symbols and variables .

The terms which have the same algebraic factors are called like terms.

The factors of - 5.7x²y are - 5.7, x² and y.

The factors of - 5.7xy² are - 5.7, x and y².

The factors of 7.5xy are 7.5, x and y.

The factors of - 7.5x²y are - 7.5, x² and y.

Therefore - 5.7x²y and - 7.5x²y have same algebraic factors.

Hence - 5.7x²y and - 7.5x²y are like terms.