Answer:
30b^5 - 20b^3
Step-by-step explanation:
5b^3(6b^2 - 4)
When you multiply numbers with exponents, you add the exponents.
5b^3 * 6b^2 = 30b^5
5b^3 * -4 = -20b^3
30b^5 - 20b^3
First, determine the area of the triangle. When all sides of the triangle are given, you can determine its area through the semi-perimeter. This is the half of a perimeter.
s = (30 + 25 + 40)/2
s = 47.5
Then, we apply the Heron's formula:
A = square root [s(s-a)(s-b)(s-c)], where a, b and c are side lengths of the triangle
A = square root [47.5(47.5-30)(47.5-25)(47.5-40)]
A = 374.53 sq feet
To find the number of cows, divide the area by 50:
Number of cows = 373.53 ft2 / 50 ft2 per cow
Number of cows = 7.4906
The estimated number of cow is 7.
The sum of two trinomials cannot be a trinomial, it can either be a polynomial or binomial depending on the numbers given.