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
tekilochka [14]
2 years ago
7

at first the average mass some durians was 3.4kg.when 2 durians were added the aevrage mass of the 2 durians was 1.3kg was added

the total avrage of durians became 3.1kg.how many durians were there at first?​
Mathematics
1 answer:
LekaFEV [45]2 years ago
4 0

We conclude that the initial number of durians is 12.

<h3>How many durians were there at first?​</h3>

Let's say that initially, we had N durians, such that these N durians have an average mass of 3.4kg.

When 2 durians  (with an average mass of 1.3kg) more are added, the new average mass is given by:

(N*3.4kg + 2*1.3kg)/(N + 2)

And we know that the above amount is equal to 3.1kg, then we can write:

(N*3.4kg + 2*1.3kg)/(N + 2) = 3.1kg

Now we can solve this equation for N:

(N*3.4kg + 2.6kg) = 3.1kg*(N + 2)

N*(3.4kg - 3.1kg) = 6.2kg - 2.6kg

N*(0.3kg) = 3.6kg

N = (3.6kg)/(0.3kg) = 12

We conclude that the initial number of durians is 12.

If you want to learn more about mass:

brainly.com/question/1354972

#SPJ1

You might be interested in
¿Cuántos litros de agua se precisa para llenar una piscina inflable de 1/4 de metro cúbico?
8_murik_8 [283]

Answer:

250 litters

Step-by-step explanation:

To solve this question, we first need to know the conversion from cubic meter to liter.

1 cubic meter is equal to 1000 liters.

So, if we have 1/4 cubic meter, we can use a rule of three to find how many liters we will need:

1 m3 -> 1000 L

1/4 m3 -> x L

x * 1 = (1/4) * 1000

x = 1000 / 4 = 250 L

So we need 250 liters of water.

6 0
3 years ago
What is the absolute value of 1/2?
harina [27]

The Absolute Value of a number is "the magnitude of a real number without regard to its sign". So the Absoulute Value of 1/2 is |1/2|

7 0
3 years ago
Help please!posted picture of question
Evgen [1.6K]
The region is in the first quadrant, and the axis are continuous lines, then x>=0 and y>=0
The region from x=0 to x=1 is below a dashed line that goes through the points:
P1=(0,2)=(x1,y1)→x1=0, y1=2
P2=(1,3)=(x2,y2)→x2=1, y2=3
We can find the equation of this line using the point-slope equation:
y-y1=m(x-x1)
m=(y2-y1)/(x2-x1)
m=(3-2)/(1-0)
m=1/1
m=1
y-2=1(x-0)
y-2=1(x)
y-2=x
y-2+2=x+2
y=x+2
The region is below this line, and the line is dashed, then the region from x=0 to x=1 is:
y<x+2 (Options A or B)

The region from x=2 to x=4 is below the line that goes through the points:
P2=(1,3)=(x2,y2)→x2=1, y2=3
P3=(4,0)=(x3,y3)→x3=4, y3=0
We can find the equation of this line using the point-slope equation:
y-y3=m(x-x3)
m=(y3-y2)/(x3-x2)
m=(0-3)/(4-1)
m=(-3)/3
m=-1
y-0=-1(x-4)
y=-x+4
The region is below this line, and the line is continuos, then the region from x=1 to x=4 is:
y<=-x+2 (Option B)

Answer: The system of inequalities would produce the region indicated on the graph is Option B

8 0
3 years ago
Helppp plssss this is due soooon
leva [86]
76;(/:14 volume of 6
7 0
3 years ago
Read 2 more answers
I want some Mathematics questions about ratio and proportion​
Nat2105 [25]

Answer:

Mel fills his gas tank up with 6 gallons of premium unleaded gas for a cost of $26.58. How much would it cost to full an 18 gallon tank?

or

Jacob ran 10 miles in 80 minutes. At that rate how far would he run in 2.5 hours?

6 0
3 years ago
Read 2 more answers
Other questions:
  • Who can help me ! <br> .... thanks
    12·1 answer
  • Can anyone help me with this.
    9·1 answer
  • Why is it impossible to determine whether the equation 5x+10=25 is true / false ? Explain
    13·2 answers
  • What is the sum of the interior <br>angles of a quadrilateral?
    5·2 answers
  • I don’t understand how to do this
    10·1 answer
  • At Ole's Waffle Shop there are 81 dirty coffee mugs and 9 clean coffee mugs. What percentage of the coffee mugs at the waffle sh
    10·1 answer
  • Brainliest to right answer any trolling will get you reported
    10·1 answer
  • ANSWER CORRECT AND FIRST PERSON I WILL GIVE BRAINLY TO YOU!
    10·1 answer
  • знайдіть розв'язок системи лінійних рівнянь 10x-6y = 18 9x+6y=39
    9·1 answer
  • I Need Help Finding The Answer To m
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!