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A factory has male and female workers in the ratio of 3 : 5. Some female workers but no male workers resigned. 5 more workers are then employed. The ratio of male to female workers is now 4 : 3 while the number of female workers is 15. Find possible original numbers of female workers.
1,A circular cynlinder with a volume 81 pi.if the perimeter of the base is 6 pi,the height is ?2,The total surface area of 2 indentical blocks which together with the volume is 1,458 units is ?3,If one side of 6-inch ruler will be marked in inches,how many points will be in the edge including 0 and 6 inch mark?4,Two sides of the O and P pointer that started from a vertical position as shown.Pointer O turns back the clock with a speed of 5 degrees per second and pointer P rotate clockwise at9 deg...
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1,A circular cynlinder with a volume 81 pi.if the perimeter of the base is 6 pi,the height is ?
2,The total surface area of 2 indentical blocks which together with the volume is 1,458 units is ?
3,If one side of 6-inch ruler will be marked in inches,how many points will be in the edge including 0 and 6 inch mark?
4,Two sides of the O and P pointer that started from a vertical position as shown.Pointer O turns back the clock with a speed of 5 degrees per second and pointer P rotate clockwise at9 degrees per second.How many complete revolutions will be made when completing 335 P O complete revolution?
5,In a certain game of 50 questions,the final score calculated by subtracting tiwce the number of wrong answer from the total number of correct answers.if a player has tried all questions and get a final score of 35 ,the number of wrong answers,he has to be ...
the length and width of a rectangle are in the ratio of 5:12. If its rectangle has an area of 240 square centimeters then what is the length in centimeters of its diagonal?
In a triangle of area 100cm2 , the ratio between the length of one side and the corresponding height is 1:2.
What is the length of the height, in m?
Answer: The height is...m.
(write your answer by decimal in simplest form)
In this figure, suppose that the length of the line segment Ac is a prime number
Cho dạng đúng của động từ trong ngoặc 1. Mr and Mrs Peter ( leave ) for Nha Trng next year2. Does your sister enjoy ( swim ) in the sea ?3. We often ( swim ) in the river when the weather is hot.4. I am sure he (tell) us about himself soon5. The pupils must (learn) their lesson before coming class.6. My brother (know) how to swim qhen he (be) eight years old7. Id love (see) that film. Will it be on tomorrow?8. My uncle (not like) tea but last night he (have) five cups of tea.9. When a girl, my...
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Cho dạng đúng của động từ trong ngoặc
1. Mr and Mrs Peter ( leave ) for Nha Trng next year
2. Does your sister enjoy ( swim ) in the sea ?
3. We often ( swim ) in the river when the weather is hot.
4. I am sure he (tell) us about himself soon
5. The pupils must (learn) their lesson before coming class.
6. My brother (know) how to swim qhen he (be) eight years old
7. I'd love (see) that film. Will it be on tomorrow?
8. My uncle (not like) tea but last night he (have) five cups of tea.
9. When a girl, my aunt often (go) to school on foot
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1. Two bisector BD and CE of the triangle ABC intersect at O. Suppose that BD.CE 2BO.OC . Denote by H the point in BC such that .OH⊥BC . Prove that AB.AC 2HB.HC 2. Given a trapezoid ABCD with the based edges BC3cm , DA6cm ( AD//BC ). Then the length of the line EF ( Ein AB,Fin CD and EF // AD ) through the intersection point M of AC and BD is ............... ? 3. Let ABC be an equilateral triangle and a point M inside the triangle such that MA^2MB^2+MC^2 . Draw an equilateral triangle ACD whe...
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1. Two bisector BD and CE of the triangle ABC intersect at O. Suppose that BD.CE = 2BO.OC . Denote by H the point in BC such that .\(OH⊥BC\) . Prove that AB.AC = 2HB.HC
2. Given a trapezoid ABCD with the based edges BC=3cm , DA=6cm ( AD//BC ). Then the length of the line EF ( \(E\in AB,F\in CD\) and EF // AD ) through the intersection point M of AC and BD is ............... ?
3. Let ABC be an equilateral triangle and a point M inside the triangle such that \(MA^2=MB^2+MC^2\) . Draw an equilateral triangle ACD where \(D\ne B\) . Let the point N inside \(\Delta ACD\) such that AMN is an equilateral triangle. Determine \(\widehat{BMC}\) ?
4. Given an isosceles triangle ABC at A. Draw ray Cx being perpendicular to CA, BE perpendicular to Cx \(\left(E\in Cx\right)\) . Let M be the midpoint of BE, and D be the intersection point of AM and Cx. Prove that \(BD⊥BC\)
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Chuyển các câu sau sang câu chủ động1) My shoes need to be cleaned before the interview.
2) My father had them cut the grass in the garden yesterday.
3) The plumber repaired the leak this morning (I had ...)
4) This work has to be done at one. (We...)
5) This building was built 100 years ago (They...)
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in a magic triangle, each of the six whole numbers 10; 11; 12; 13; 14; 15 is placed in one of the circles so that the sum, S, of the three numbers on each side of the triangle is the same. The largest possible value for S is