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3 years ago

Help please this is a very important question to me!! Will be very grateful for help!!

Mathematics

2 answers:

Aleonysh [2.5K]3 years ago

6 0

Answer:

Step-by-step explanation:

what do you think it is?

kirill115 [55]3 years ago

6 0

Step-by-step explanation

i think its b

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the smaller rectangle is a 1/4 scale drawing of the original figure. Use the drop-down menus to show the missing dimensions of t

mihalych1998 [28]

Answer:the answer is 363

Step-by-step explanation:

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4 years ago

Daija and Malia are dog groomers. Daija’s workday is 10 hours and Malia’s workday is 8 hours. Daija and Malia each work 40 hours

AlekseyPX

Answer:

They will have a 89.25 difference in their weekly earnings.

Step-by-step explanation:

Dalia:40/10=4

15*12.75=191.25

Malia:40/8=5

8*12.75=102

191.25-102=89.25

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3 years ago

-4²-5·-4+2<br> please!!! i really need to know if it is 6

tangare [24]

Answer:

The answer is 6!

Step-by-step explanation:

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4 years ago

Read 2 more answers

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VashaNatasha [74]

Answer:

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Step-by-step explanation:

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5 0

2 years ago

Read 2 more answers

g Given the system of equations: 15 c1 – 5 c2 – c3 = 2400 - 5 c1 + 18 c2 – 6 c3 = 3500 - 4 c1 - c2 + 12 c3 = 4000 (a) Calculate

denpristay [2]

Answer

(a)

$A^{-1} = \frac{1}{3493} \begin{pmatrix} 210 && -59 && -12 \\ 84 && 176 && 95 \\ 77 && -5 && 295 \end{pmatrix}$

(b)

$A^{-1} b = \begin{pmatrix} \frac{500}{7} \\\\ \frac{2400}{7} \\\\ \frac{2700}{7} \end{pmatrix}$

Step-by-step explanation:

Remember that when you want to solve a problem like this, you express the equation as following

$Ax = b$

So, if you know the inverse of $A$ then

$x = A^{-1} b$

For this case

$A = \begin{pmatrix} 15 && 5 && -1 \\ -5 && 18 && -6 \\ -4 && -1 && 12 \end{pmatrix}$

Now for this case the inverse of A would be

$A^{-1} = \frac{1}{3493} \begin{pmatrix} 210 && -59 && -12 \\ 84 && 176 && 95 \\ 77 && -5 && 295 \end{pmatrix}$

Then when you multiply with the vector solution

$A^{-1} b = \frac{1}{3493} \begin{pmatrix} 210 && -59 && -12 \\ 84 && 176 && 95 \\ 77 && -5 && 295 \end{pmatrix} * \begin{pmatrix} 2400 \\ 3500 \\ 4000 \end{pmatrix} = \frac{1}{3493} \begin{pmatrix} 249500 \\ 1197600 \\ 1347300 \end{pmatrix}\\\\\\= \begin{pmatrix} \frac{500}{7} \\\\ \frac{2400}{7} \\\\ \frac{2700}{7} \end{pmatrix}$

So from that information you can conclude that the solution to the system of equations is x = 500/7 y = 2400/7 and z = 2700/7

7 0

3 years ago