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Convert the following decimal to a fraction and simplify. 1.45 = /

Convert the improper fraction into a mixed fraction.  = /

The opposite of `n` is ______.

Multiply `a` × 100

Evaluate the expression if x = 4 and y = `y`

Simplify.-`a“b`

Perform the given operation. `a` – `b`

Convert from scientific notation to standard notation. `a` × 10`b`

Evaluate the expression if x = `x`, y = `y`, and z = `z` `a`x + `b`y – z

Evaluate the expression if x = `x`, y = `y`, and z = `z` xz – y2