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Vinil7 [7]
3 years ago
13

Where do the graphs Of linear equations 2x+3y=4 and 5x+6y=7 intersect

Mathematics
1 answer:
UNO [17]3 years ago
4 0
5x + 6y = 7                         SUBSTITUTION METHOD
2x + 2y = 4 


         5x + 6y = 7                      Solve for either x or y in 1 of the 2 equations.
               - 6y - 6y
     -----------------------
         5x = -6y + 7 
        -----  ------  ----
          5       5      5

          x = -6/5y + 7/5



2(-6/5y + 7/5) + 2y = 4             Substitute the expression you got for x or y into 
-12/5y + 14/5 + 2y = 4              the other equation.
-2/5y + 14/5 = 4 
          - 14/5  - 14/5 
------------------------------
-2/5y = 6/5 
--------  --------
- 2/5y  - 2/5y

y = -3 



5x + 6(-3) = 7                             Plug in the value you got for y in step 2 into the 
5x - 18 = 7                                  equation that you didn't use.
    + 18 + 18
------------------
5x = 25 
---    -----
5       5

x = 5 


(x,y) ⇒ coordinate
(5,-3) ⇒ final answer

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5.818, 5 9/25, 53/10, 5.81 from least to greatest. THanKs :)
Nastasia [14]

Answer:

53/10, 5 9/25 ; 5.81 ; 5.818

Step-by-step explanation:

To find the solution we need to make some calculations:  

53/10 = 5.3

5 9/25 = 5.36

So we have that the solution is:

53/10, 5 9/25 ; 5.81 ; 5.818

4 0
3 years ago
Read 2 more answers
PLEASEEEE.. MY TEACHER IS ASKING FOR THE ANSWER ​
VARVARA [1.3K]

See attached graph: v is on the y-axis and t is on the x-axis

3 0
3 years ago
3) y +24r + 45 = 0<br> What is the greatest common factor
Bond [772]

Answer:

The greatest common factor 24 and 45

The GCF of 24 and 45 is 3.

Step-by-step explanation:

I googled it

5 0
3 years ago
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Suppose that y varies directly as the square root of x, and that y=21 when x=361. What is y when x=247? (Round off your answer t
igomit [66]

Answer:

17.37

Step-by-step explanation:

y varies inversely as the square root of x

Mathematically:

y = k.root x

We first find k here

To find k, we were made to know that y is 21 and x = 361

k = y/root.x

k = 21/root. 361

k = 21/19

now what is y when x = 247

From y = k.root x

y = 21/19 * root 247

y= 21/19 * 15.72

y = 17.37

8 0
3 years ago
Sin (3pi/4) =_____ please help!!!
Jlenok [28]

Answer:

That is asking you to find the sine of (3/4) PI radians.

If you look at the attached graphic, you will see that (3/4) PI radians = 135 degrees

Going to this calculator, we see that the sine of 135 degrees is 0.70711

https://www.1728.org/trigcalc.htm

Step-by-step explanation:


5 0
3 years ago
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