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Rasek [7]
3 years ago
11

A system of equations is shown below:

Mathematics
2 answers:
Stolb23 [73]3 years ago
8 0
(-2.-1). You can just plug in the numbers. -1=-6+5 is -1=-1. -1-2(-2)=3 is -1--4=3 is 3=3.
Elina [12.6K]3 years ago
6 0

Answer:

-2,-1

Step-by-step explanation:

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Substitute this equation x+3y=18 & -x-4y=-25
sveticcg [70]

Answer:

 {x,y} = {3/7,-43/7}

Step-by-step explanation:

System of Linear Equations entered :

  [1]    x + 3y = -18

  [2]    -x + 4y = -25

Graphic Representation of the Equations :

   3y + x = -18        4y - x = -25  

 

 

Solve by Substitution :

// Solve equation [1] for the variable  x  

 

 [1]    x = -3y - 18

// Plug this in for variable  x  in equation [2]

  [2]    -(-3y-18) + 4y = -25

  [2]    7y = -43

// Solve equation [2] for the variable  y  

  [2]    7y = - 43  

  [2]    y = - 43/7  

// By now we know this much :

   x = -3y-18

   y = -43/7

// Use the  y  value to solve for  x  

   x = -3(-43/7)-18 = 3/7  

Solution :

{x,y} = {3/7,-43/7}

5 0
2 years ago
**The following scenario is for #12, #13, and #14 on this test.** A school chorus has 90 sixth grade students and 75 seventh gra
givi [52]

Answer:

The music director can make 15 groups of performers with 6 sixth grade students and 5 seventh grade students in each group.

Step-by-step explanation:

A school chorus has 90 sixth-grade students and 75 seventh-grade students.

Factor these two numbers:

Find GCF(90,75):

Now,

Therefore, the music director can make 15 groups of performers with 6 sixth grade students and 5 seventh grade students in each group.

6 0
2 years ago
What expressions are equivalent to q+p+q+p+q
Kipish [7]
You can resolve all of them.
so the first one would be 3q+2p
that second 2p+3q
the third 2p+2q+q which equals 2p+3q

they all end up as the same thing so both are equivalent
6 0
3 years ago
Pls help ASAP ILL GIVE BRAINLYEST
docker41 [41]
Xavier

he charges $10 per hour

good luck :)
6 0
3 years ago
95 POINTS FOR AWNSER
kari74 [83]

Answer:

yes \: he \: is \: correct \\   \underline{\boxed{(\triangle{ \delta}) = 8}}

Step-by-step explanation:

change \: in \: temp. \: ( \triangle{ \delta}) = t_2 - t_1 \\ hence \to \\( \triangle{ \delta}) =  (- 2) - (- 10) \\ (\triangle{ \delta}) =  - 2 + 10 \\ (\triangle{ \delta}) = 10 - 2 \\ (\triangle{ \delta}) = 8

7 0
2 years ago
Read 2 more answers
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