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Alchen [17]
3 years ago
12

Solve the following system of equations and select the correct answer below:

Mathematics
1 answer:
Sauron [17]3 years ago
5 0
3x + 3y + 2z = -5 ⇒ 3x + 3y + 2z = -5 ⇒ 3x + 3y + 2z =   -5
1x + 1y + 3z = -4 ⇒ 1x + 1y + 3z = -4 ⇒ 3x + 3y + 9z = -12
3x -  1y + 5z = -8                                                    -7z = 7
                                                                                -7    -7
                                                                                  z = -1
3x + 3y + 2z = -5                                                      
1x + 1y + 3z = -4 ⇒ 1x + 1y + 3z = -4
3x -  1y + 5z = -8 ⇒ 3x -  1y + 5z = -8
                                        4x + 8z = -12     

     4x + 8z = -12
 4x + 8(-1) = -12
       4x - 8 = -12
           + 8    + 8
            4x = -4
             4      4
              x = -1

        3x + 3y + 2z = -5
3(-1) + 3y + 2(-1) = -5
           -3 + 3y - 2 = -5
             3y - 3 - 2 = -5
                  3y - 5 = -5
                      + 5  + 5
                       3y = 0
                        3     3
               (x, y, z) = (-1, 0, -1)
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Please I need help asap!!
Solnce55 [7]

Answer:

B

Step-by-step explanation:

Hi there!

We're given the measure of <AOC (the big angle) as 90°

and the measure of <BOC as 14° and the measure of <AOB as (3x+46)°

we want to find the value of what x is

because of angle addition postulate, m<AOC=m<BOC+m<AOB

so we can substitute our known values into that equation

90°=14°+3x°+46°

our goal is to isolate the variable of x onto one side

add 14 and 46 together

90°=3x°+60°

subtract 60° from both sides

30°=3x°

divide both sides by 3

10°=x

therefore B is your answer

Hope this helps!

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