Answer:
A) 288.62
Step-by-step explanation:
10.4×15.3= 159.12
10.4²+15.3²= X²
342.25= X²
18.5= X
7×18.5= 129.5
129.5+159.12= 288.62
Equal in what? Cm, m, mm ?
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Answer:
60
Step-by-step explanation:
perimeter (p) = 8 + 17 + 15 = 40
semi-perimeter (s) = p/2 = 20
Area = square root of s(s-a)(s-b)(s-c) where a,b,c are the sides of the triange by Herons formula.
Therefore, area = 20(20-8)(20-15)(20-17) = square root of 3600 = 60
Answer:
16.
Step-by-step explanation:
3(6 - 8)² + 8÷2 = 3(-2)² + 8÷2
= 3 * 4 + 8÷2
= 3 * 4 + 4
= 12 + 4
=16
