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3 years ago

HELP ME WILL MARK YOU AS BRAINLIEST IF CORRECT

Mathematics

1 answer:

Verdich [7]3 years ago

6 0

Answer:

C. (-3, 2, -1)

Step-by-step explanation:

There are two types of matrices. One is REF and the other is what makes REF simpler--RREF. We use RREF to solve for REF because it makes the solution easy to find. RREF is displayed in your problem... it means that it's already solved, so the answers are already given on the right side, which is -3,2,-1. This only works with the combination provided (with the 0s and 1s). Otherwise, you'd have to solve.

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Determine if the given ordered pairs are solution of x+ 4y = 7.

const2013 [10]

Answer:

(3, 1 ) is a solution

Step-by-step explanation:

To determine if the given points are solutions, substitute the x and y values into the left side of the equation and if equal to the right side then they are solutions.

(3, 1 )

3 + 4(1) = 3 + 4 = 7 = right side , then a solution

(2, 1 )

2 + 4(1) = 2 + 4 = 6 ≠ 7 ← not a solution

6 0

2 years ago

Please help, will mark brainiest. 20+ POINTS

professor190 [17]

Answer:

2.5•2 = 5

Step-by-step explanation:

The resulting two-dimensional cross-section is the area of a square.

Area of a square is equal to:

$A=bh$

Having

$b = 2.5\ in\\h = 2\ in$

<u>substitute</u>

$A=2.5*2=5\ in^{2}$

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2 years ago

Seth measured a hotel and made a scale drawing the the scale he used was 1 inch : 3 feet the actual of the hotel is 18 feet how

sertanlavr [38]

Answer:

Step-by-step explanation:

Width of the room in the drawing = x

1 : 3 :: x : 18

Product of means = Product of extremes

3 * x = 18 *1

x = 18 ÷ 3

x = 6

Width of the room in the drawing = 6 inches

7 0

2 years ago

PLZZ help with this!!!!

murzikaleks [220]

Answer:

2x² + 15x + 27

Step-by-step explanation:

(2x + 9)(x+3)

2x² + 6x + 9x+ 27

2x² + 15x + 27

6 0

3 years ago

Read 2 more answers

Evaluate the expression.

goblinko [34]

Answer:

-17

The answer is -17

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3 years ago

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