D
E F
cot D = DE / EF
cot 25° = DE / 19
19 * cot 25° = DE ≈ 40.7
x + 2y = 4 square both sides ⇒ x^2 + 4xy + 4y^2 = 16 (1)
xy = 18 multiply through by 4 ⇒ 4xy = 72 (2)
Sub (2) into (1)
x^2 + 72 + 4y^2 = 16 subtract 72 from both sides
x^2 + 4y^2 = -56
See here :
https://web2.0calc.com/questions/suppose-the-polynomial-f-x-is-of-degree-3_1
https://web2.0calc.com/questions/graphing_83
The area is given by EG * DC = 16 * 27 = 432
Note : HF = 432 /18 = 24
The bottom base can be found as 2 + 2* (2 * cos 60°) = 2 + 4 (1/2) = 2 + 2 = 4
So....the perimeter = 3*2 + 4 = 10
2* 3 * 5 * 7 *19 = 3990
2^2 * 3 * 5 * 7 * 19 = 7980
g(2x) = (2x + 3) / 4
2 ( g(x)) = (x + 3) / 2
So
(2x + 3) / 4 = (x + 3) / 2 cross-multiply
2 (2x + 3) = 4 ( x + 3)
4x + 6 = 4x + 12
No solution possible
Anchor Jill in any chair
The two boys can sit on either side of her in 2 ways
And the other two girls can be arranged in 2! = 2 ways
So 2 * 2 = 4 ways
Very nice, geno.....!!!
