標題:
Mathe
發問:
1. ABCD is a square. If AB=(3x-1)cm and BD=(x+5)cm(a) find the value of x,(b) find the length of AB,(c) find the area of the square ABCD.2. The sum of the interior angles of an n-sided polygon is given asS=(n-2)x180度If each of angles is y=10度(a) Fild the sum of the interior angles of a regular... 顯示更多 1. ABCD is a square. If AB=(3x-1)cm and BD=(x+5)cm (a) find the value of x, (b) find the length of AB, (c) find the area of the square ABCD. 2. The sum of the interior angles of an n-sided polygon is given as S=(n-2)x180度 If each of angles is y=10度 (a) Fild the sum of the interior angles of a regular pentagon. (b) Find the value of y in the following regular pentagon. 3. The monthly salary of Mr. Chan is $P. He spends $Q each month and saves the rest. At the end of the year. he has to pay $7000 as salary tax. (a) How much does he save each year after paying the tax? (b) If p=9000 and q=7000, what is the amount of his yearly saving
1a) AB = BD (sq. propety) 3x-1 = x+5 2x = 6 x =3 1b) AB = 3x-1 = 3(3)-1 =8 1c) Area = AB * AB = 8 * 8 =64 2a) Regular pentagon has 5 sides, so the sume of interior angeles is: S = (5-2) x 180 =540 2b) 5 equals angels in a regular pentagon, so : y = 540 / 5 y = 108 3a) Saving for the year : (P - Q) x 12 Saving after the tax = (P - Q) x 12 - 7000 3b) Yearly Saving = (P - Q) x 12 - 7000 (9000 - 7000) x 12 -7000 = 17000
其他解答:
1a. 3x - 1 = x + 5 => x = 3 1b. AB = 8 1c. area = 64 cm2 2a. (5 - 2) x 180 = 540 2b. y = 10 3a. 12 (P - Q) - 7000 3b. 17,000|||||1a. 3x - 1 = x + 5 => x = 3 1b. AB = 8 1c. area = 64 cm2 2a. (5 - 2) x 180 = 540 2b. y = 10 3a. 12 (P - Q) - 7000 3b. 17,000
Mathe
發問:
1. ABCD is a square. If AB=(3x-1)cm and BD=(x+5)cm(a) find the value of x,(b) find the length of AB,(c) find the area of the square ABCD.2. The sum of the interior angles of an n-sided polygon is given asS=(n-2)x180度If each of angles is y=10度(a) Fild the sum of the interior angles of a regular... 顯示更多 1. ABCD is a square. If AB=(3x-1)cm and BD=(x+5)cm (a) find the value of x, (b) find the length of AB, (c) find the area of the square ABCD. 2. The sum of the interior angles of an n-sided polygon is given as S=(n-2)x180度 If each of angles is y=10度 (a) Fild the sum of the interior angles of a regular pentagon. (b) Find the value of y in the following regular pentagon. 3. The monthly salary of Mr. Chan is $P. He spends $Q each month and saves the rest. At the end of the year. he has to pay $7000 as salary tax. (a) How much does he save each year after paying the tax? (b) If p=9000 and q=7000, what is the amount of his yearly saving
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最佳解答:1a) AB = BD (sq. propety) 3x-1 = x+5 2x = 6 x =3 1b) AB = 3x-1 = 3(3)-1 =8 1c) Area = AB * AB = 8 * 8 =64 2a) Regular pentagon has 5 sides, so the sume of interior angeles is: S = (5-2) x 180 =540 2b) 5 equals angels in a regular pentagon, so : y = 540 / 5 y = 108 3a) Saving for the year : (P - Q) x 12 Saving after the tax = (P - Q) x 12 - 7000 3b) Yearly Saving = (P - Q) x 12 - 7000 (9000 - 7000) x 12 -7000 = 17000
其他解答:
1a. 3x - 1 = x + 5 => x = 3 1b. AB = 8 1c. area = 64 cm2 2a. (5 - 2) x 180 = 540 2b. y = 10 3a. 12 (P - Q) - 7000 3b. 17,000|||||1a. 3x - 1 = x + 5 => x = 3 1b. AB = 8 1c. area = 64 cm2 2a. (5 - 2) x 180 = 540 2b. y = 10 3a. 12 (P - Q) - 7000 3b. 17,000
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