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
olga55 [171]
3 years ago
9

The sum of three numbers is 87. The third number is 2 times the second. The first number is 7 more that the second. What are the

numbers?
Mathematics
1 answer:
Marysya12 [62]3 years ago
3 0
<span>19 + 57 + 9 = 85 
Do you need farther explaining</span>
You might be interested in
You and a friend are playing a game by tossing two coins. If both coins land
Novosadov [1.4K]

c. No. You have a probability of winning, while your friend has a
probability of winning.
Or it’s A
3 0
3 years ago
Read 2 more answers
If J is between H and K and HJ = 3(x + 2), JK = 3x -4 and KH = 44. What is the value of HJ?
Ira Lisetskai [31]
KH = 3(x + 2) + <span>3x - 4
KH = 3x + 6 + 3x - 4
KH = 6x + 2 = 44
6x = 42
x = 7
HJ = 3(x + 2)
HJ = 3(7 + 2)
HJ = 27</span>
7 0
3 years ago
) The density of oil in a circular oil slick on the surface of the ocean at a distance of r meters from the center of the slick
Feliz [49]

Answer:

Therefore the mass of the of the oil is 409.59 kg.

Step-by-step explanation:

Let us consider a circular disk. The inner radius of the disk be r and the outer diameter of the disk be (r+Δr).

The area of the disk

=The area of the outer circle - The area of the inner circle

= \pi (r+\triangle r)^2- \pi r^2

=\pi [r^2+2r\triangle r+(\triangle r)^2-r^2]

=\pi [2r\triangle r+(\triangle r)^2]

Since (Δr)² is very small, So it is ignorable.

∴A=2\pi r\triangle r

The density \delta (r)= \frac{40}{1+r^2}

We know,

Mass= Area× density

        =(2r \pi \triangle r)(\frac{40}{1+r^2}})

Total mass M=\sum_{i=1}^n \frac{80r_i\pi }{1+r^2}\triangle r_i

Therefore

\sum_{i=1}^n \frac{80r_i\pi }{1+r^2}\triangle r_i=\int_0^5 \frac{80r\pi }{1+r^2}dr

                      =40\pi[ln(1+r^2)]_0^5

                      =40\pi [ln(1+5^2)-ln(1+0^2)]

                     =40\pi ln(26)

                     = 409.59 kg (approx)

Therefore the mass of the of the oil is 409.59 kg.

3 0
3 years ago
1 nnnnnnnneeeeeeeeeeeed help
zavuch27 [327]
Answer is 84.86 cm^2
8 0
3 years ago
283838383838382828 + 83838383888282ab
natta225 [31]

2.8392222e+17

Step-by-step explanation:

283838383838382828 + 83838383888282=2.8392222e+17

5 0
3 years ago
Other questions:
  • when 20 is added to 7 times the number x, the result is -1. What number results when 2 times x is subtracted from 5?
    5·2 answers
  • The area of a rectangle is 4.9 square units. The length is 2.5 units and the width is y units. What is the value of y? y=1.96 y=
    13·1 answer
  • Calculate the average speed in (km/hr) of charlie who runs to the store 4km away in 30 minutes? How much will Charlie run in two
    14·1 answer
  • What is the value of the digit in the tenths place of 0.77
    9·1 answer
  • you took a 20 question test and received a 65% on the test. how many question did you answer correctly
    14·1 answer
  • At noon a train leaves Washington, D.C., headed for Miami, Florida, a distance of 1100 miles. The train travels at a speed of 60
    11·1 answer
  • Helps help!!!
    9·1 answer
  • Please help me. I have been stuck for 45 minutes
    13·1 answer
  • 4x+2\5 less than equal to 2
    9·1 answer
  • What are the coordinates of the point that is one half the distance between A(-1, -2) and B(6, 12)?
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!