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
Effectus [21]
3 years ago
9

Find the solution of this system of equations 4x + y = 3 4x - y = -5

Mathematics
2 answers:
Blababa [14]3 years ago
6 0
-1/4 is the answer.
laiz [17]3 years ago
4 0

Answer:

y = 7/2

x = -1/8

Step-by-step explanation:

4x + y = 3-----------eqn 1

4x - y = -5----------eqn 2

Let's pick eqn 1

4x + y = 3

Let's make y the subject of the formula

y = 3 -4x

Since y = 3 - 4x, substitute the value of y into eqn 2

4x - ( 3 - 4x) = -5

Using the - to open the bracket

4x - 3 + 4x = -5

16x - 3 = -5

16x = -5 + 3

16x = -2

Divide through by 16 to get the value of x

16x/ 16 = -2/16

x = -1/8

Since we've gotten the value for x, find y using eqn 1

4x + y = 3

4(-1/8) + y = 3

-4/8 + y = 3

y = 3 + 4/8

LCM is 8

y = 24 + 4 / 8

y = 28/8 ( using 4 to divide)

y = 7/2

x = -1/8

y = 7/2

You might be interested in
You bought books from an online book store that charges a flat fee for shipping each order. There was no sales tax on this purch
Alla [95]

Answer:

$28.00

Step-by-step explanation:

The y-intercept of the graph corresponds to the flat fee for shipping.  In this case, $3.50.

You paid a total of $31.50 for both the books and the shipping.  The cost of the books is therefore $31.50 − $3.50 = $28.00.

7 0
3 years ago
How to solve 2.43 * 13 in a algorithm.
bogdanovich [222]

Answer:

31.59

Step-by-step explanation:

Attached below!

(Btw: I dont know  wht algorithm is but i tink its wht i just did.... so hope its right! )  

5 0
3 years ago
Read 2 more answers
A red die, a blue die, and a yellow die (all six sided) are rolled. we are interested in the probability that the number appeari
NISA [10]

5/54 or approximately 0.092592593  
There are 6^3 = 216 possible outcomes of rolling these 3 dice. Let's count the number of possible rolls that meet the criteria b < y < r, manually.
 r = 1 or 2 is obviously impossible. So let's look at r = 3 through 6.
 r = 3, y = 2, b = 1 is the only possibility for r=3. So n = 1
 r = 4, y = 3, b = {1,2}, so n = 1 + 2 = 3
 r = 4, y = 2, b = 1, so n = 3 + 1 = 4
 r = 5, y = 4, b = {1,2,3}, so n = 4 + 3 = 7
 r = 5, y = 3, b = {1,2}, so n = 7 + 2 = 9
 r = 5, y = 2, b = 1, so n = 9 + 1 = 10
 
 And I see a pattern, for the most restrictive r, there is 1 possibility. For the next most restrictive, there's 2+1 = 3 possibilities. Then the next one is 3+2+1
= 6 possibilities. So for r = 6, there should be 4+3+2+1 = 10 possibilities.
Let's see
 r = 6, y = 5, b = {4,3,2,1}, so n = 10 + 4 = 14
 r = 6, y = 4, b = {3,2,1}, so n = 14 + 3 = 17
 r = 6, y = 3, b = {2,1}, so n = 17 + 2 = 19
 r = 6, y = 2, b = 1, so n = 19 + 1 = 20 
 And the pattern holds. So there are 20 possible rolls that meet the desired criteria out of 216 possible rolls. So 20/216 = 5/54.
6 0
2 years ago
What is the rate of change between (2,2) and (17,7)
choli [55]

Answer:

1/3

Step-by-step explanation:

(7-2)/(17-2)=5/15=1/3

5 0
3 years ago
The density of a certain material is such that it weighs 5 ounces per fluid ounce of volume. Express this density in pounds per
pav-90 [236]

Answer:

Don't lisen to that the anwer is 0.3125

Step-by-step explanation:

3 0
3 years ago
Other questions:
  • B squared - 4ac. A=-3 b=1 c= 3
    14·1 answer
  • Need help with number 2 ASAP! Try to show work! Thank you!!!
    8·1 answer
  • Find the surface area of the pyramid
    5·1 answer
  • In 2012 Obama receiver 65,899,660 votes and Romney received 60,932,152 votes. In this election, if a voter for either Obama or R
    10·2 answers
  • Solve for e<br><br> 7(2e-1)-11=6+6e
    10·1 answer
  • What do you call (0,0)?
    14·1 answer
  • What number should be placed in the box to help complete the division calculation?
    12·1 answer
  • With sales tax, it costs $707 to buy a $700 dining room table. What is the sales tax
    9·1 answer
  • Describe the relationship between the two quantities. volume of a cylinder; height
    8·1 answer
  • Find the surface area of this composite solid.
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!