Answer:
CE = 105
Step-by-step explanation:
CE = CD + DE , hence
6x = 4x + 8 + 27 ( subtract 4x from both sides )
2x = 35 ( divide both sides by 2 )
x = 17.5
⇒ CE = 6 × 17.5 = 105
Answer:
78,4 cm^2
Step-by-step explanation:
I did this in my head so i could be wrong but im pretty certain this is right
(-4x^2 -6x -1) - (-x^2 -5x +3) = -3x^2 - x - 4
Summation of 3n + 2 from n = 1 to n = 14 = (3(1) + 2) + (3(2) + 2) + (3(3) + 2) + . . . + (3(14) + 2) = 5 + 8 + 11 + ... + 44 ia an arithmetic progression with first term (a) = 5, common difference (d) = 3 and last term (l) = 44 and n = 14
Sn = n/2(a + l) = 14/2(5 + 44) = 7(49) = 343
Therefore, the required summation is 343.
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