Question

Write an expresssion to represent the sum of three times the square root of a number and -7

Answer 1

`3√(n) - 7`

Explanation:

hey there,

< First, let's arrange this into a better order.

three × the square root of a number + (-7)

Since we don't know what the "number" is in "square root of a number", just put "n", so it would be
`√(n)`. Now let's continue creating an expression:

It would be something like 3 ×
`√(n)` - 7 but that is NOT fully correct because...

Multiplication always needs to be together according to the rules of PEMDAS. Technically, you can leave the expression we created above the way it is, since everyone should know PEMDAS, but it's always better to write it in PEMDAS order.

MULTIPLY FIRST. When you multiply something with variables or square roots with a number, just put them next to each other, so here it would be:
`3√(n)`.

`3√(n) - 7` is your final answer. >

Hope this helped! Feel free to ask anything else.