How would the expression x^2-4 be written using difference of squares

Charlie has a $30 smoothie gift card. Each time he uses the card to buy a smoothie, $2 is deducted from his card. If the balance on his card today is $12, how many smoothies has he purchased with the card?

Need a sentence that shows commutative property of multiplication

At the age of 20 weeks, Zoe weighed 16 lb 4 oz. Her birth weight was about 33 1/3% of her 20 - week weight. To the nearest ounce, what was her birth weight?

Solve log6x + log14=1

Simplify 95.5 (2-19.5) ^4

Convert 7/20 to a decimal

For the right triangle shown below, the lengths of two sides are given. Find the third side. Leave your answer in simplified, radical form. a = 5 b = 10 c = ?

89 more than the quotient of an unknown number and 62 is 94

Round 277,300 to the nearest whole number and least

Can someone tell me what 58 - (1/4) ^2 is