The equal sign with the slash means "is not equal to".
"At least" is expressed with the "greater or equal" sign, for example, x >= 100. (I don't know how to draw the greater-or-equal sign here - it is a horizontal line beneath the greater sign).
The greater than or equal to sign is "≥".
No, expressions do not have equal signs. Equations do, though. You can think of it like this: Equtions have EQUAl signs, while expressions do not.No, an expression cannot have an equal sign. If it were to have an equal sign, it would then be an equation.
The less-than sign alone means "less than"; if there is a line below, it means "less than or equal".
If you mean in Excel, yes: you must always start a formula with an equal sign.
The combined sign has no special meaning. Any formula in Excel starts with an equal sign. To refer to a cell, you can write, for example, =A1. This can also be written as =+A1. The "+" isn't really necessary in this case. Most likely, a user started the formula with a "+" (out of old habit, since that's what people used to do in older spreadsheet programs), and Excel added the equal sign, which is required in Excel, automatically.
An equal sign because in order for the formula to go through correctly it has to have an (=)
an equal sign =
an equal sign =
the asterisk is used for what function when building a formula in excel
The equal sign with the slash means "is not equal to".
By 'an equal sign with a lightning bolt [through it]', do you mean '≠'? That means 'not equal to'. For example, 6≠9.
Not in Excel.
Every formula, equation, or function starts with a equal sign in a given cell.
Equal sign
It means the figures on either side of the equal sign have equal values to each other.