The mean, median, and mode of the 7 data values 60,100,x,40,50,200,90 are all equal to x. What is the value of ?
The mean, median, and unique mode of the positive integers 3,4,5,6,7 and x are all equal. What is the value of x ?
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Vào google dịch mà dịch chữ nha bn
The sum of the ages of three boys is equal to the sum of the ages of three girls, and the product of the boys’ ages is equal to the product of the girls’ ages, too. All six children are of different ages, and all are under 20. Suppose that their ages are integers, and the age of the second oldest boy is 14, what is the age of the second oldest girl?
Câu 1 :Each of cars can take 8 people. How many cars needed to take 124 people?
Câu 2 : How many integer numbers between 200 and 300 are there for which the hundreds digit equals the sum of the other two digits?
Câu 3 : The average of five numbers is 20. The average of the five number is 18 when one of the numbers is chaned to 4. What is the orginal value of the changed number?
Câu 4 :A book has 250 pages starting at number 1. How many digits are there in the page numbers of the book?
Câu 5 : Find A, if A is 3 less than the average of 48; 55; 29 and A. The value of A is…
Câu 6 : The sum of denominator and numerator of a fraction is 121 and the fraction is equal to 4/7. Find the denominator of the fraction?
Câu 7 : The sum of two numbers is equal to 77. If the first number is multiplied by 8 and the second by 6, the two product are equal. The larger of these numbers is…
Câu 8 : Which is the greatest 2 - digit number divisible by 2, 3 and 4?
Câu 9 : Calculate: (1 + 2/5) x 6/7.
Câu 10 : Give the number sequence: 1, 4, 7, 10, 13, … Find the 15th term of the number sequence.
câu 1:16 ; câu 2 : ai mà biết được
Given fraction 59/109. if its denominator is increased by X units and its numerator is decreased by X units then new fraction will equal to 72/120. What is the value of X?
Mình biết đáp an là 4 nhưng ko bít cách làm!!!
Find the values of x and y such that 3x=5y and 2x-3y=5 .
Answer: The value of x and y are ............., respectively.
(used ";" between the numbers)
3x=5y
=>x/5=y/3
=>2x/10=3y/9=2x-3y/10-9=5/1=5(tính chất dãy tỉ số bằng nhau)
Today Dich Vong A Primary School organized country fairs. Three Vietnamese friend, Yen Dung and parents for pocket money. The amount initially of three different you are and the total amount of all three is 48,000 dong. Vietnam Yen amount equal to the amount of existing nest, then back to Yen Dung amount equal to the amount of Dung are, then finally left Vietnam Dung amount equal to the amount of Vietnamese who had the time this three you have equal amount.
Ask each of your first time how much money?
You present the answer in the box Send comments below. Three answers or you will be rewarded and early / plus 1 VIP month Online Math. Your answers and prizes will be announced on Friday 10/09/2015. Puzzles next will go online on Saturday 10/10/2015
Read the following passage and mark the letter A, B, C or D on your answer sheet to indicate the correct word for each of the blanks.
Researchers in the field of psychology have found that one of the best ways to make an important decision, such as choosing a university to attend or a business ___(5)___, involves the utilization of a decision worksheet. Psychologists ____(6)____ optimization compare the actual decisions made by people to theoretical ideal decisions to see how similar they are. Proponents of the worksheet procedure believe that it will yield optimal, that is, the best decisions ___(7)___ there are several variations on the exact format that worksheets can take, they are all similar in their essential aspects.
Worksheets require defining the problem ___(8)____ a clear and concise way and then listing all possible solutions to the problem. Next, the pertinent considerations that will be affected by each decision are listed, and the relative importance of each consideration or consequence ___(9)__ Each consideration is assigned a numerical value to reflect its relative importance. A decision is mathematically calculated by adding these values together. The alternative with the highest number of points emerges as the best decision.
Điền vào số (7)
A. Although
B. However
C. Therefore
D. Despite
Đáp án A
B và C loại, vì However và Therefore thường đứng đầu câu, trước dấu phẩy.
D loại vì Despite + N: mặc dù ...
Đáp án là A. Although + clause: mặc dù ...
Một số gồm 6 chữ số bắt đầu bằng chữ số 8. Số này chia hết cho 9 và tất cả các chữ số của số này đều khác nhau. Giá trị nhỏ nhất có thể có của số này là gì? MNPQ là hình vuông được tạo thành từ các hình chữ nhật giống hệt nhau và hai hình vuông có diện tích 9cm2 và 16cm2. Diện tích của hình vuông MNPQ là? Tôi có hai chữ số trong phần thập phân. Tôi lớn hơn 75 nhưng nhỏ hơn 80. Tôi ít nhất có thể là số nào?
What is the largest 3-digit number that has all of its digits different and is equal to 37 times the sum of its digit ?