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exis [7]
3 years ago
8

Solve for the following system of equations. -7x+6y=9 -2x-5y+16 x=? y=?

Mathematics
2 answers:
CaHeK987 [17]3 years ago
4 0

Answer:

x=-3\\\\y=-2

Step-by-step explanation:

Given the system of equations \left \{ {{-7x+6y=9} \atop {-2x-5y=16}} \right., you can use the Elimination Method to solve it.

You can multiply the first equation by -2 and the second equation by 7, then add both equations and solve for the variable "y":

\left \{ {{14x-12y=-18} \atop {-14x-35y=112}} \right.\\...........................\\-47y=94\\\\y=\frac{94}{-47}\\\\y=-2

Substitute the value of "y" into any original equations and solve for the variable "x". Then:

-7x+6y=9\\\\-7x+6(-2)=9\\\\-7x-12=9\\\\-7x=9+12\\\\x=\frac{21}{-7}\\\\x=-3

Alex17521 [72]3 years ago
3 0

Answer:

x = -3 and y = -2

Step-by-step explanation:

It is given that,

-7x + 6y = 9     ----(1)

-2x - 5y = 16    -------(2)

<u>To find the solution of given equations</u>

eq(1) * 2 ⇒

-14x + 12y = 18 ------(3)

eq(2) * 7 ⇒

-14x - 35y = 112   ---(4)

eq (3) - eq(4) ⇒

-14x + 12y = 18 ------(3)

<u>-14x - 35y = 112 </u>  ---(4)

    0   4y = -94

y = 94/(-47) = -2

Substitute the value of y in eq (2)

-2x - 5y = 16    -------(2)

-2x - 5*-2 = 16

-2x +10 = 16

-2x = 6

x = 6/-2 = -3

Therefore x = -3 and y = -2

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Answer:

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5 0
2 years ago
Sarah enjoys cutting lawns and charges $20 for each small lawn and $30 for each large lawn. Sarah earned $140 for mowing 6 yards
saul85 [17]

x+y=6 and 20x+30y=140 can be used to determine the number of each type of lawn mowed by Sarah.

Step-by-step explanation:

Given,

Charges for cutting small lawns =$20

Charges for cutting large lawns = $30

Total yards mowed = 6

Total amount earned = $140

According to given statement;

x+y=6    Eqn 1

20x+30y=140    Eqn 2

x+y=6 and 20x+30y=140 can be used to determine the number of each type of lawn mowed by Sarah.

Keywords: linear equation, addition

Learn more about linear equations at:

  • brainly.com/question/1597065
  • brainly.com/question/1598227

#LearnwithBrainly

7 0
3 years ago
Julie walks the track every morning for 1 hour. It takes her 1/5 hour to walk 1 mile. How many miles does she walk every morning
frutty [35]
1/5 hour = 1 mile
Multiply each side by 5
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5 0
3 years ago
225.286 rounded to hundredths on a numberline
Schach [20]
Well if rounding it to the tenths is 230 then you would round back down to 200
3 0
3 years ago
Read 2 more answers
3. Multiply the following binomials:<br> (2 Points)<br> (x - 3) (6x - 2) What’s is the answer?
aleksklad [387]

Answer:

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Step-by-step explanation:

1. multiply each number

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