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Aleksandr-060686 [28]
3 years ago
14

What are the measures of angles 1 and 2? m∠1 = °

Mathematics
1 answer:
nikdorinn [45]3 years ago
7 0
Where’s the whole page
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use the matrix tool to solve the system of equations enter the answer as an ordered pair. 8x+5y=9 -x+y=7
Dimas [21]

Answer:

x = -44/13

y = -65/13

Step-by-step explanation:

Using matrix form means using the crammers rule

The matrix form of the expression is written as;

\left[\begin{array}{ccc}8&5\\-1&1\\\end{array}\right] \left[\begin{array}{ccc}x\\y\\\end{array}\right] = \left[\begin{array}{ccc}9\\7\\\end{array}\right]

AX = B

taking the determinant of A;

|A| = 8(1) - 5(-1)

|A| = 8 + 5

|A| = 13

After replacing the first row with the column matrix;

A_x =\left[\begin{array}{ccc}9&5\\7&-1\\\end{array}\right]

|Ax| = 9(-1)-5(7)

||Ax| = -9 - 35

|Ax| = -44

x = |Ax|/|A|

x = -44/13

similarly for y

A_x =\left[\begin{array}{ccc}8&9\\-1&7\\\end{array}\right]

|Ay| = 8(7)+9

|Ay| = 56+9

|Ay| = 65

y = |Ay|/|A|

y = -65/13

6 0
3 years ago
Graph y=-3x+7 Plz help me
Annette [7]

Answer:

y=MX+b

Step-by-step explanation:

b is your y intercept

m is your slope

7 0
3 years ago
Read 2 more answers
HELP ME PLEASE (im doin other stuff for other classes and my mom keeps bothering me to finish this so help)
Lady_Fox [76]

Answer:

x=12

Step-by-step explanation:

each CD is 12$

7 0
2 years ago
An acid is prepared by mixing 400 mL of water and 100 mL of pure sulfuric acid. What is the
Natasha2012 [34]
C. 25
——-
Divide 400/100=4
——-
Than divide 4/100
—-
8 0
3 years ago
What is the correct substitution? evaluate. 3m when m = -9 and n = -2
Vinvika [58]

Hi my name is Vanessa i'm Boribaby. I just wanted to let you know that answers A and C are the exact same thing.


I think I know your answer.... if any of your answers say 3(-9)(-2) then that is your answer.


Please know that the percentage of my answer is 50/50. I hope this help!!!! Good luck!!!!

8 0
3 years ago
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