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2 years ago

What is the solution of the matrix equation?

Mathematics

1 answer:

katrin [286]2 years ago

6 0

Hello from MrBillDoesMath!

Answer:

The first choice ( -12, 20)

Discussion:

Using matrix multiplication we find the equations:

1x + 1y = 8 (A)

2x + 3y = 36 (B)

Next, compute

2(A) - B =>

(2x + 2y) - (2x + 3y) = 2*8 - 36 =>

(2x - 2x) + ( 2y-3y) = 16 - 36 =>

-y = -20 =>

y = 20

Substituting this y value in (A) gives

x + 20 = 8 =>

x = 8 - 20 =>

x = -12

The answer is the first choice ( -12, 20)

Thank you,

MrB

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A new movie opened in a local theater. On opening day, 985 people saw the movie. Each day after opening day, the number of peopl

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Answer:

About 3891 people saw that movie.

Step-by-step explanation:

Day 1: 985 people

Day 2: (985*8)/10 (20% gone) = 788

Day 3: (788*8)/10 (20% gone) = 630.4

Day 4: (630.4*8)/10 (20% gone) = 504.32

Day 5: (504.32*8)/10 (20% gone) = 403.456

Day 6: (403.456*8)/10 (20% gone) = 322.7648

Day 7: (322.7648*8)/10 (20% gone) = 258.21184

Adding this up:

985+788+630.4+504.32+403.456+322.7648+258.21184=

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3 years ago

Write a rule to describe the function shown.

GREYUIT [131]

Y = 2/3x
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2 years ago

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How many whole sandwiches can be made with 2 pounds of cheese if each sandwich has 3 ounces of cheese on it

mariarad [96]

10 whole sandwiches can be made with 2 pounds of cheese if each sandwhich has 3 ounces of cheese on it.

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3 years ago

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Sviatoslav solved the quadratic equation x^2-x-1=0 by completing the square. In the process, he came up with the equivalent equa

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Answer:

$x=\frac{1+\sqrt5}{2}$ and $x=\frac{1-\sqrt5}{2}$

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Step-by-step explanation:

We are given that a quadratic equation

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We have to solve the equation by completing square and find the value of b.

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2 years ago

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Answer:

<h2><em><u>t = 15.2 is the answer</u></em></h2>

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<h2><em><u>1. Make an equation</u></em></h2>

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19.8 + 2t = 50.2

-19.8 - 19.8

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<h2><u><em>4. Check:</em></u></h2>

12 + 7.8 + t + t = 50.2

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<h2><em><u>50.2 = 50.2</u></em> Correct!</h2><h2 />

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