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4 years ago

HELP ASAP!!! SOMEONE SMART DO THESE 5 QUESTIONS FOR ME PLEASE. IM GIVING BRAINLIESTI

Mathematics

1 answer:

drek231 [11]4 years ago

8 0

Answer:

1) (7 + 4) x 2 = 22 cm

2) 8 x 4 = 32 cm

3) (15+8) x 2 = 46 cm

4) 2.5 x 4 = 10 cm

5) (9 + 7) x 2 = 32 cm

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After a new $28,000 car is driven off the lot, it begins to depreciate at a rate of 18.9% annually.

REY [17]

Answer:

C(t) = $28,000(0.811)^t (Answer A)

Step-by-step explanation:

The value of the car is decreasing. Thus, by the end of the first year of ownership, the car will have the value $28,000(1 -0.189)^1, where the "-0.189" represents DECAY instead of GROWTH.

Please use " ^ " to indicate exponentiation.

Then the desired formula is C(t) = $28,000(0.811)^t (Answer A)

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3 years ago

Franklin's office just started a new recycling program this year. They aim to recycle 7 kilograms of paper each week. Write an e

Sati [7]

Answer:

7x=y

Step-by-step explanation:

3 0

3 years ago

Read 2 more answers

Factor the trinomial 6y squared + 19y + 15

Musya8 [376]

Answer:

1.y = -5/3 = -1.667

2. y = -3/2 = -1.500

Step-by-step explanation:

90 + -1 = -91

-45 + -2 = -47

-30 + -3 = -33

-18 + -5 = -23

-15 + -6 = -21

-10 + -9 = -19

-9 + -10 = -19

-6 + -15 = -21

-5 + -18 = -23

-3 + -30 = -33

-2 + -45 = -47

-1 + -90 = -91

1 + 90 = 91

2 + 45 = 47

3 + 30 = 33

5 + 18 = 23

6 + 15 = 21

9 + 10 = 19

6 0

3 years ago

La medida del vector se llama:

Doss [256]

Step-by-step explanation:

suususisissiaisisjsjx

8 0

3 years ago

Solve the system by finding the reduced row-echelon form of the augmented matrix.

Alex

Answer:

The reduced row-echelon form is

$\left[ \begin{array}{cccc} 1 & 0 & 6 & -10 \\\\ 0 & 1 & 2 & -3 \\\\ 0 & 0 & 0 & 0 \end{array} \right]$

The solutions to the system of equations are:

$y=-2z-3,\:x=-6z-10$

Step-by-step explanation:

To solve this system of linear equations,

$x-4y-2z=2\\2x-11y-10z=13\\-x+6y+6z=-8$

you must:

Step 1: Transform the augmented matrix to the reduced row echelon form.

In an augmented matrix, each row represents one equation in the system and each column represents a variable or the constant terms.

This is the augmented matrix that represents the system.

$\left[ \begin{array}{cccc} 1 & -4 & -2 & 2 \\\\ 2 & -11 & -10 & 13 \\\\ -1 & 6 & 6 & -8 \end{array} \right]$

It can be transformed by a sequence of elementary row operations to the matrix.

There are three kinds of elementary matrix operations.

Interchange two rows (or columns).
Multiply each element in a row (or column) by a non-zero number.
Multiply a row (or column) by a non-zero number and add the result to another row (or column).

Using elementary matrix operations, we get that

Row Operation 1: add -2 times the 1st row to the 2nd row

Row Operation 2: add 1 times the 1st row to the 3rd row

Row Operation 3: multiply the 2nd row by -1/3

Row Operation 4: add -2 times the 2nd row to the 3rd row

Row Operation 5: add 4 times the 2nd row to the 1st row

$\left[ \begin{array}{cccc} 1 & 0 & 6 & -10 \\\\ 0 & 1 & 2 & -3 \\\\ 0 & 0 & 0 & 0 \end{array} \right]$

Step 2: Interpret the reduced row echelon form

The reduced row echelon form of the augmented matrix is

$\left[ \begin{array}{cccc} 1 & 0 & 6 & -10 \\\\ 0 & 1 & 2 & -3 \\\\ 0 & 0 & 0 & 0 \end{array} \right]$

which corresponds to the system

$x+6z=-10\\y+2z=-3\\0=0$

The system has infinitely many solutions.

$y=-2z-3,\:x=-6z-10$

4 0

4 years ago