Mean is 8
you have to add all the numbers and then divide it by the number of elements you have in this case 7
15-t + 8t = -13
15 + 7t = -13
7t = -13-15
7t = -28
t = -4
4a + 11-a = 2
3a = 2-11
3a = -9
a = -3
Answer:
14.14
Step-by-step explanation:
√(x2 - x1)² + (y2 - y1)²
√(10 - 20)² + (25 - 15)²
√(-10)² + (10)²
√(100) + (100)
√200
= 14.14
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The best and most correct answer among the choices provided by the question is </span> <span>B. 5.09 cm²</span><span>.
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Hope my answer would be a great help for you. </span>
