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
natta225 [31]
2 years ago
13

What is TR(39)? pls help this is going to be on my exam...

Mathematics
1 answer:
musickatia [10]2 years ago
3 0

Answer:

780

Step-by-step explanation:

So when you're adding consecutive numbers like this. 1+2+3...+39. You add 39 and 1. This is 40. 2+38 is 40. This is a pattern. Now, we do 40 multiplied by 39 and this will give you the number 1620. After this you would have to divide this product by 2. The answer will soon be 780.

You might be interested in
michelle lives with 2 brothers, 3 sisters, her mother, and her father. including Mitchell, 3/4 of her family likes to go swimmin
ruslelena [56]
Michelle(1)+bros(2)+sisters(3)+mom(1)+Pop(1)=8
3/4 of 8 = 6
So, 6 people in Michelle's family like to go swimming
8 0
3 years ago
Read 2 more answers
The answer and steps for this question
melamori03 [73]
I will solve your system by substitution.<span><span>x=<span><span>3y</span>−1</span></span>;<span><span><span>5x</span>−<span>7y</span></span>=19</span></span>Step: Solve<span>x=<span><span>3y</span>−1</span></span>for x:Step: Substitute<span><span>3y</span>−1</span>forxin<span><span><span><span>5x</span>−<span>7y</span></span>=19</span>:</span><span><span><span>5x</span>−<span>7y</span></span>=19</span><span><span><span>5<span>(<span><span>3y</span>−1</span>)</span></span>−<span>7y</span></span>=19</span><span><span><span>8y</span>−5</span>=19</span>(Simplify both sides of the equation)<span><span><span><span>8y</span>−5</span>+5</span>=<span>19+5</span></span><span>(Add 5 to both sides)

</span><span><span>8y</span>=24</span><span><span><span>8y</span>8</span>=<span>248</span></span>(Divide both sides by 8)<span>y=3</span>Step: Substitute3foryin<span><span>x=<span><span>3y</span>−1</span></span>:</span><span>x=<span><span>3y</span>−1</span></span><span>x=<span><span><span>(3)</span><span>(3)</span></span>−1</span></span><span>x=8</span><span>(Simplify both sides of the equation)</span><span>

x=<span><span>8<span> and </span></span>y</span></span>=3
6 0
3 years ago
Read 2 more answers
Planners of an experiment are evaluating the design of a sphere of radius r that is to be filled with helium (0°c, 1 atm pressur
Vikentia [17]
The solution is:A mole of gas occupies 22.4 L A liter is 1000 cubic centimeters because 1 cubic centimeter = 1 mL
One Helium molecule (essentially one helium atom) has atomic mass 4 g/mol So for every 22400 cubic centimeters of volume, we have 4 grams of helium Density of helium = 4g / 22400 cm^3 = 1g / 5600 cm^3 
Volume of a sphere = (4/3)(pi)r^3 Volume of the outside sphere (the entire sphere) is (4/3)(pi)(R+T)^3 Volume of the inside sphere (the hollow region) is (4/3)(pi)R^3 
The difference for the volume of silver. (4/3)(pi)(R+T)^3 - (4/3)(pi)R^3 = (4/3)(pi)(3R^2T + 3RT^2 + T^3) 
The density of silver is 10.5g/cm^3 
So the mass of the silver is computed by:10.5*(4/3)(pi)(3R^2T + 3RT^2 + T^3) = (14*pi)(3R^2T + 3RT^2 + T^3) = (14pi)T(3R^2 + 3RT + T^2) 

Now for the mass of helium: volume x density = (4/3)(pi)R^3 (1/5600) = (pi/4200)R^3 

Set the two masses equal: (pi/4200)R^3 = (14pi)T(3R^2 + 3RT + T^2) R^3 = 58800*T(3R^2 + 3RT + T^2) R / T = 58800*(3R^2 + 3RT + T^2) / R^2 = 58800*( 3+T/R^2+(T/R)^2) 
then solve for xx = T / R 1/x = 58800*( 3+x/R+x^2) 1/58800 = x (3 + x/R + x^2) 1/58800 = 3x + x^3 x^3 + 3x - 1/58800= 0 x = ~ 5.66893x10^(-6)
6 0
3 years ago
Answer this plz<br> find 7%of£40
posledela
£2.8

7% of £40 is £2.8
4 0
2 years ago
What is the value of x if f(x) = 23
lilavasa [31]

Answer:

in f (x)= x

here x=x so answer is 23

8 0
2 years ago
Other questions:
  • What is the answer for this. <br>simplify -6 ÷ 3​
    7·1 answer
  • X=23y+4 solve for x and graph​
    9·1 answer
  • Solve the following equation.<br><br> <img src="https://tex.z-dn.net/?f=5%3D%5Cfrac%7Bw%7D%7B2.2%7D" id="TexFormula1" title="5=\
    14·2 answers
  • Consider the diagram below. Which of the following is the value of X?
    9·1 answer
  • What is the product of....<br><br> (0.061)•(0.43)=
    14·1 answer
  • If f (x) = 2 x + 5 and three-halves are inverse functions of each other and f (x) = 2x + 5, what is
    13·1 answer
  • Three students sit in the first row. In the second row, 3 students sit behind each of those students, and so on. Write an expres
    10·1 answer
  • Do<br> 5cm 5cm 10cm <br> form a triangle?
    14·2 answers
  • Which of the following shapes contain perpendicular line segments?
    6·2 answers
  • 14. Jabari has read 13 chapters of a 22-chapter book.<br> What percent of the chapters has she read?
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!