Answer:
<h3>
A = 0.5(2x+6)(6x+13) = 6x² + 49x + 78</h3>
Step-by-step explanation:
H = 2x+6 - the hight
3H = 3(2x+6) - triple the hight
3H-5 = 3(2x+6) - 5 - five less than triple the height
Area of triangle: A = 0.5BH
B = 3(2x+6)-5 = 6x + 18 - 5 = 6x + 13
H = 2x+6
So:
A = 0.5(2x+6)(6x+13) = (x+6)(6x+13) = 6x² + 13x + 36x + 78
A = 6x² + 49x + 78
Answer: x^2
Step-by-step explanation: x times x is x^2
Which of the following is an arithmetic sequence? 2, 4, 8, 16, ... 12, 4, 4/3, 16/3 ... 1/2, -1/2, -3/2, -5/2 ... 1/2, -1/2, 1/2
andre [41]
Answer:
the third one, because it has a common difference
Answer:
<em>x=5</em>
Step-by-step explanation:
4(5)-3=17
20-3=17
2/5 = 0.4
8/9 = 0.888888889
3 3/4 = 15/4
7/10 = 0.7
2 3/8 = 19/8
5/6 = 0.833333333
the rest I'm not sure of...hoped i helped with some.
