Answer:
4
Step-by-step explanation:
S² - 16s - 57 = s² - 16s + 64 - 121 = s² - 2*1*8 + 8² - (11)² =
<span>we use the formula a</span>² - 2ab + b² = (a-b)²
(s - 8)² - (11)²
<span>we use the formula a</span>² - b² = (a+b)*(a-b)
(s - 8 )² - (11)²
a² - b²
[ (S - 8) - 11] * [ (S-8) + 11] = [S-19] * [S+3]
Answer:
20
hope this helps
have a good day :)
Step-by-step explanation:
Answer:
x = 5
Step-by-step explanation:
since the triangles are similar, their side lengths are proportional to each other.
12 / 20 = 3 / x
cross multiply to obtain
12x = 20*3
12x = 60
divide by 12
x=5