1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
aleksandr82 [10.1K]
3 years ago
9

Here are 5 number cards 2 5 7 8 9 one of the cards is removes and the mean average of the remaining four number cards is 6. Whic

h card was removed? You must show your working
Mathematics
1 answer:
hram777 [196]3 years ago
3 0

Answer:

7

Step-by-step explanation:

If one of the cards is removes and the mean average of the remaining four number cards is 6, then their sum is 6\cdot 4=24.

The sum of all five cards is

2+5+7+8+9=31.

Since 31-24=7, then the card with number 7 is removed.

You might be interested in
Cylinder A has radius r, height h, and a volume of 10pi cubic units. Cylinder B has twice the radius and twice the height.
viva [34]

Answer:

Step-by-step explanation:

10 = r²h

(2r)²(2h) = 16r²h

volume of B is 1.6 times the volume of A

4 0
3 years ago
Read 2 more answers
Find the circumference of a circle with diameter 8 meters
uysha [10]
The answer is going to 25.13
6 0
3 years ago
Read 2 more answers
When the function f(x) = 5•2x is evaluated for x = 3, the output is:
In-s [12.5K]
The answer is 30

2 x 3 = 6
5 x 6 = 30
3 0
2 years ago
Solving the whole thing
erik [133]
Let
x---------------> distance from people living to the city center

we Know that
Zone 1 covers people living within three miles of the city center
Zone 1 ------------> [x < 3 miles]

Zone 2 covers those between three and seven miles from the center
Zone 2 ------------> [ 3 <= x < = 7  miles]

Zone 3 covers those over seven miles from the center
Zone 3 ------------> [  x > 7  miles]

<span>calculate the distance between two points to find the value of x
</span>
case A) point (0,0)  point (3,4)
x=√[(y2-y1)² +(x2-x1)²]----------> √[(4-0)² +(3-0)²]------> √[16+9]
x=√25-------------> x=5 miles

the answer Part A)
people living in (3,4)
x=5 miles -------------> covers Zone 2 [ 3 < =x <= 7  miles]


case B) point (0,0)  point (6,5)
x=√[(y2-y1)² +(x2-x1)²]----------> √[(5-0)² +(6-0)²]------> √[25+36]
x=√61-------------> x=7.81 miles

the answer Part B)
people living in (6,5) 
x=7.81 miles -------------> covers Zone 3 [  x > 7  miles]

case C) point (0,0)  point (1,2)
x=√[(y2-y1)² +(x2-x1)²]----------> √[(2-0)² +(1-0)²]------> √[4+1]
x=√5-------------> x=2.23 miles

the answer Part C)
people living in (1,2) 
x=2.23 miles -------------> covers Zone 1 [ x < 3  miles]

case D) point (0,0)  point (0,3)
x=√[(y2-y1)² +(x2-x1)²]----------> √[(3-0)² +(0-0)²]------> √[9]
x=√9-------------> x=3 miles

the answer Part D)
people living in (0,3) 
x=3 miles -------------> covers Zone 2 [ 3 < =x <= 7  miles]

case E) point (0,0)  point (1,6)
x=√[(y2-y1)² +(x2-x1)²]----------> √[(6-0)² +(1-0)²]------> √[36+1]
x=√37-------------> x=6.08 miles

the answer Part E)
people living in (1,6) 
x=6.08 miles -------------> covers Zone 2 [ 3 < = x <= 7  miles]

4 0
3 years ago
Three randomly selected households are surveyed. /The numbers of people in the households are 1, 3, and 8. Assume that samples o
inn [45]
The question is asking to find the variance for the said samples in the problem ans use the sample data to determine each variance, and base on my further computation and further calculation, I would say that the answer would be the following:
#1. 3.3 -> 1 and 3 -> 2/9
#2. 1-> 0->3/9
#3. 6.3 - > 8 and 3-> 2/9
#4 49-> 1 and 8-> 2/9
8 0
2 years ago
Other questions:
  • What are the solution(s) of the quadratic equation 98 – x2 = 0? x = x = x = no real solution
    14·2 answers
  • What’s the difference of dependent variable and independent variable
    13·2 answers
  • Can someone help me for the question 2 pls!!! How I can solve this
    11·1 answer
  • Need to know how to work out 3762 decide by six
    5·1 answer
  • Carlton bought stock at $5.25 for each share. The price of the stock decreased $3.75 after one month. It then increased $1.85 an
    7·2 answers
  • CAN ANYONE HELP MY GRADES ARE KINDA LOW AND I NEED TO SLOVE THIS SO I CAN BOOST UP MY GRADES
    5·1 answer
  • Which type of study is MOST LIKELY to be used?
    5·2 answers
  • List the sides of the triangle in order from shortest to longest
    7·1 answer
  • Five times a number is divided by 7 more than the number. If the result is 2, then what was the original number?
    9·2 answers
  • HELPPPPPPPPPPP!!!!!!!!!!!!!!!!!!!!!
    11·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!