Answer:

Step-by-step explanation:
x^-y=1/(x^y) so 3t^-4=3/(t^4)
Answer: y= 12x +40
Step-by-step explanation:
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Answer: $14.40
10% of $18 = $1.80 (just divide it by 10)
$1.80 x 2 = $3.60
20% of $18 = $3.60
since it’s a discount, you subtract from the original price so:
$18 - $3.60 = $14.40