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lubasha [3.4K]
3 years ago
9

Which matrix can be used to solve the system?

Mathematics
1 answer:
Brut [27]3 years ago
4 0
It's the last choice.  In the top row you have the 1's that are the coefficients on the x and the y, and the solution for that equation is 21; in the second row you have the 5 from the x and the 4 from the y and the solution for that equation which is 20.  I'm more used to writing them down instead of across, but there you have it anyways
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Mr. Abernathy purchased a selection of wrenches for his shop. The total cost was $78. He bought the same number of $1.50 and $2.
Over [174]
78 = 1.50x + 2.50x + 4(x/2)) + 3((x/2) + 1))
78 = 4x + 4(x/2) + 3((x/2)+1)
78 = 4x + 2x + (3(x/2) + 3)
78 = 6x + 1.5x + 3
75 = 7.5x
10 = x
Mr. Abernathy bought 10 wrenches at $1.50, 10 wrenches at $2.50, 5 wrenches at $4, and 6 wrenches at $3.
6 0
3 years ago
PLEASE HELP FAST!! <br>1. Find x. Show your work.​
Taya2010 [7]

Answer:

X is right there

Step-by-step explanation:

See?

7 0
3 years ago
I need to find X and Y to make this shape a parallelogram. Can someone help me? (geometry student)
aliya0001 [1]

Answer:

x=52

Step-by-step explanation:

One of the properties of parallelograms is that angle A = Angle C

5y-54 = 3x eq1

Another property of parallelograms is that angle A + angle B = 180 degrees

5y-54+2y-60 = 180

7y = 180+114 = 294

y = 42

Putting this value in eq1

3x = 5*42-54 = 210-54 = 156

x = 52

8 0
2 years ago
1) 15^2=4^2+2(32)x<br><br> 2) 105=45+5x
forsale [732]

① 15² = 4² + 2(32) x
225 = 16 + 64x
-64x = 16 - 225
-64x = -209
x = 209/64

② 105 = 45 + 5x
-5x = 45 - 105
-5x = -60
x = 60/5
x = 12

8 0
3 years ago
Which function is not linear?
Umnica [9.8K]

Answer: y=x^2+2

Step-by-step explanation:

y=x^2+2 (answer choice 3) is parabolic and not linear

that is the answer

8 0
3 years ago
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