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soldi70 [24.7K]

4 years ago

5

Use a graphing calculator or spreadsheet software to solve 4x + y + z = 1 8x – 4y – 7z = 2 5y + 9z = 3 using matrices.

1 answer:

creativ13 [48]4 years ago

4 0

Put the three equation in the matrice for as I do then take it to a reduced row echelon form, then you will see if he solution is trival, infinitly manay solution ot if it has a definite solution.

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A house cost $112,000 in 2010. By the year 2015, the house had a value of $132,000. What was the growth rate as a percent for th

Olenka [21]

Answer:

I believe its 6.48%

7 0

3 years ago

What are the steps to this problem (and the answer?)

Svetradugi [14.3K]

Answer:

$(25 {x}^{2} + 20xy + 16 {x}^{2} )(5x - 4y) = \\ 125 {x}^{3} + 100 {x}^{2} y + 80x {y}^{2} - 100 {x}^{2} y \\ - 80x {y}^{2} - 64 {y}^{3} = \\ 125 {x}^{3} - 64 {y}^{3} \\ please \: give \: brainliest$

5 0

3 years ago

A cyclist rides her bike at a rate of 12 meters per second. What is this rate in kilometers per hour? How many kilometers will t

IgorLugansk [536]

Answer:

Part 1) The rate is $43.2\frac{km}{h}$

Part 2) $129.6\ km$

Step-by-step explanation:

Part 1)

we know that

A cyclist rides her bike at a rate of 12 meters per second

Remember that

1 hour=3,600 seconds

1 kilometer=1,000 meters

therefore

$12\frac{m}{sec} =\frac{(12/1,000)}{(1/3,600)}=\frac{12*3,600}{1,000}=43.2\frac{km}{h}$

Part 2) How many kilometers will the cyclist travel in 3 hours?

using proportion

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3 0

3 years ago

Does any one know how to do 2r+4<8 it’s aggravating me

Maru [420]

Answer:

Step-by-step explanation:

2r+4<8

subtract 4 from both sides

2r<4

divide by two

no need to reverse the sign since you are not dividing by a negative number

r<2

7 0

3 years ago

[WILL GIVE BRAINLY IF CORRECT] While on vacation in Lanberry, Grace went out for a dinner that cost $108.63. If sales tax in Lan

irinina [24]

Answer:

$132.25

Step-by-step explanation:

108.63 * 0.0375 ≈ 4.07

108.63 * 0.18 ≈ 19.55

19.55 + 4.07+ 108.63 = 132.25

Have a good day :)

5 0

3 years ago

Read 2 more answers