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 ?

HT

Hoàng Thế Vinh

12 tháng 3 2017

1) ABC is a triangle where M is the midpoint of segment BC. MD and ME are two bisectors of triangles AMB and AMC respectively. If AM= m; BC = a . Then DE = ??? 2)\(\dfrac{1}{\left(x+29\right)^2}+\dfrac{1}{\left(x+30\right)^2}=\dfrac{5}{4}\) What is the product of all real solutions to the equation above? 3) The sum of all possible natural numbers n such that \(n^2+n+1589\) is a perfect square is..... 4) Given that x is a positive integer such that x and x+99 are perfect squares The...

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#Toán lớp 8

2

PN

Phan Nguyễn Hoàng Vinh

19 tháng 3 2017

?????????????????????????????????????????????? Are you learning English or Math? I'm sure you are're mistake of English

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HT

Hoàng Thế Vinh

19 tháng 3 2017

:v

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PG

Phong Gió

13 tháng 2 2020

The lengths of three sides of a triangle are all primes, and the perimeter of the triangle is 17. Find the sum of all possible value(s) of the second longest side.

#Toán lớp 8

0

NM

Nhật Minh

15 tháng 2 2020

The lengths of three sides of a triangle are all primes, and the perimeter of the triangle is 4343. Find the sum of all possible value(s) of the longest side.

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0

1M

1234thhc minhtoannmt

26 tháng 12 2017

Let a, b and c be positive integers. The sum of 160 and the square of a is equal the sum of 5 and the square of b. The sum of 320 and the square of a is equal to the sum of 5 and the square of c, a is

#Toán lớp 8

0

LT

Lê Thu Trang

10 tháng 6 2018

Given a square with the length of one side is 8 cm and a isosceles triangle with the length of its base is 12 cm. If the area of the square is equal to the area of the isosceles triangle then what is the length of the height of the isosceles triangle, in cm?

#Toán lớp 8

1

NN

Nguyễn Ngọc Hà Linh

12 tháng 10 2018

32/3 nha ban

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NN

Nguyễn Như Quỳnh

14 tháng 10 2019

The harmonic mean of a set of non-zero number is the reciprocal of the average of the reciprocals of the number. What is the harmonic mean of 1, 2, and 4?

#Toán lớp 8

0

NV

Nguyễn Võ Văn Hùng

12 tháng 2 2017

Given the rectangle ABCD and the triangle BEC. Find the value of x such that the ratio of the area of the rectangle to the area of the triangle BEC is 7:3.

Answer: x = ....... cm.