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
ratelena [41]
3 years ago
6

① 5J+2S =12.20 ② 5J+ 10S =15.80 elimination method

Mathematics
1 answer:
hram777 [196]3 years ago
4 0

Answer:

<h2>S = 9/20</h2><h2>J = 113/50</h2>

Step-by-step explanation:

5J +2S =12.20 ........(1)\\5J+10S=15.80......(2)\\Multiply \:equation \:(1)\:by\:the\:coefficient\:of\:x\:in equation\:(2)\\\\Multiply\:equation(2)\: by\: the\: coefficient\:of \:x\: in \:equation (1)\\\\5J +2S =12.20 ........(1) \times 5\\5J+10S=15.80......(2)\times 5\\\\25J+10S=61......(3)\\25J+50S = 79......(4)\\Subtract\:equation\:(4)\:from\: equation\: (3)\\-40S =-18\\\frac{-40S}{-40}=\frac{-18}{-40}\\  S = 9/20\\

Substitute \:9/20\:for \:x \:in\:equation\:(1)\:or \:equation\:(2)\\5J+2S = 12.20\\5J +2(9/20) =12.20\\5J +9/10=12.20\\5J=12.20-9/10\\5J=113/10\\Cross-Multiply\\50J = 113\\J = 113/50

You might be interested in
Suppose there were m married couples, but that d of these 2m. people have died, Regard the d deaths as striking the 2m people at
iren2701 [21]

The function that represents surviving people are X = 2m - d

Given that there are m married couples and d of the 2m of these couples have died, the total people that remain is expressed as:

Total people remaining = Total married couple - those that died

Total married couple = 2m

Total people that died = d

Taking the difference to get the remaining people;

Total people remaining = 2m - d

Hence the function that represents surviving people are X = 2m - d

Learn more on difference here: brainly.com/question/2605546

6 0
2 years ago
Find the area of this composite figure.
Margaret [11]

Answer: ≈ 196.53 m²

All work is shown in the picture.

6 0
3 years ago
The bases of a trapezoid are 24 feet and 16 feet. The height of the trapezoid is 12 feet. What is the area of the trapezoid?
stepan [7]
The formula to use is A=(b1+b2)h if one base is 24 and the other one is 16 which equals to 40 when you add then you still have H which is 12 so you could either divide 12 by two to get half or multiply by 12 and then divide it
40•12=480
480 divided by 2= 240
Your final answer should be 240ft
4 0
3 years ago
HELP ME PLEASE :( I’m confused
Maksim231197 [3]

Answer:

11) I haven't done these yet don't go by my answers wait for more responses.

So if TR looks exactly half way from the middle and it says its 11, and if PS is basically two of TR then it would be 22. It looks to me that TR is 11 which is exactly half way I think, and PS looks double of TR so 2 x 11 = 22. Please go by the way you learned i don't know if I'm right.

12) If MK is exactly straight and its 10, half of 10 would be 5. I did half of 10 because L to M looks as if it is 10 already but since its L to the point in the middle that would be half way of the total line from L to M. So L to the point must be 5, MK is already given which is 10 so now we add 5 since L to the point in the middle is half way of 10 which is 5.

10(MK) + 5(L to the point in the middle of the circle) = 15

I don't want to be the one who brings your grades down so do by the way you learned.

8 0
3 years ago
What is 13^2*10<br><br> A.1690<br> B.1700<br> C.1800<br> D.169000
shutvik [7]

A. 1690.


You can get this answer by doing 13 to the power of 2 and then multiplying that answer by 10.

5 0
3 years ago
Read 2 more answers
Other questions:
  • The difference of twice a number and 8 is greater than 28.
    6·1 answer
  • PLEASE HELP<br> Type in expanded form. Use parentheses to indicate multiplication.<br><br> (2r)³
    9·2 answers
  • Help me plz I don’t know how to do this
    7·1 answer
  • W=Y(b+A) , for b <br> Solve the equation for the specified variable which is b
    11·2 answers
  • What is the sum if the first 22 terms of the following series? 86 + 79 + 72 + 65 +58+...
    13·1 answer
  • Quick anyone know the answer to this problem? Will give brainiest
    15·2 answers
  • Can someone help me plslsssssss
    11·1 answer
  • Evaluate 5h when h = 7 Help
    7·1 answer
  • Give the coordinates of the image. ​
    13·1 answer
  • Cual es el factor de 10?
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!