What is (3xx-1)(8xx+7)

24^4+13x²-7

Step-by-step explanation: calculate the products

(3x²-1)×(8x²+7)

calculate the parentheses

24x^4+21x^2-8x^2-7

collect like terms

solution

24x^4+13x^2-7

$4034.40

the perimeter of the field is the sum of the lengths of the four sides:

47 yd + 158 yd + 47 yd + 158 yd = 410 yd

the cost of 3 ft (1 yd) of fence is 3×$3.28 = $9.84.

so the cost of jake's wood perimeter fance is

(410 yd) × ($9.84 /yd) = $4034.40