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dexar [7]
2 years ago
7

Which expression is equivalent to 9x2-2y+3x2-3y?

Mathematics
2 answers:
serious [3.7K]2 years ago
6 0

Answer:

the third option is the answer if you simplify

Harman [31]2 years ago
6 0
Answer:

Third option

Step-by-step explanation:

9x^2 - 2y + 3x^2 - 3y

Combine like terms

9x^2 + 3x^2 = 12x^2
•••••••••••••••••••••••••••
12x^2 - 2y - 3y or 12x^2 - 5y
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celina measured the height of a window frame as 5.55 feet, but the actual height was 6 feet. What is the percentage of error in
skad [1K]
(6/5.55) * 100 = 108.11 %

The percent error is 108.11 %
6 0
3 years ago
PLEASE HELP ASAP 100 POINTS AND BRAINIEST<br> please solve 7y + 13 -4z when =5 and z =9.
Molodets [167]

Answer:

35+13-36

Step-by-step explanation:

35+13=48

48-36=12

8 0
3 years ago
Read 2 more answers
Helppppp with this. What do I have to do?
vaieri [72.5K]

You need to use the grids to draw rectangles which meet the requirements to help you put the answers in on the right.


1) Short side of 7 and long side of 9.

2) Short side of 9 and long side of 10.

3) Short side of 3 and long side of 8.

4) Short side of 4 and long side of 9.

5) Short side of 3 and long side of 5.

6) Short side of 6 and long side of 8.

7) Short side of 1 and long side of 2

8) Both sides 10 (this is technically a square).

9) Short side of 6 and long side of 9.

10) Short side of 7 and long side of 8.

11) Short side of 2 and long side of 3.

12) Short side of 6 and long side of 9.


You can draw these a few different ways to still get a correct result, so above are just one way of doing it.

5 0
3 years ago
Diego is building a patio deck. The length of the deck is (x + 8) feet. The width of the deck is (x + 3) feet. What is the simpl
antoniya [11.8K]

Answer:

(4x + 22) feet

Step-by-step explanation:

Diego is building a patio deck. The length of the deck is (x + 8) feet. The width of the deck is (x + 3) feet. What is the simplest form expression for the perimeter of the deck?

A patio deck = Rectangular in shape

Hence:

The formula for the Perimeter of a rectangle = 2L + 2W

Where

L = Length

W = Width

The length of the deck is (x + 8) feet. The width of the deck is (x + 3) feet.

The perimeter of the deck =

2(x + 8)feet + 2(x + 3)feet

= (2x + 16) feet +( 2x + 6)feet

= (2x + 2x + 16 + 6) feet

= (4x + 22) feet

Therefore, the perimeter of the deck = (4x + 22) feet

6 0
3 years ago
Two computer disks and three notebooks cost $17. However,
zhuklara [117]

Answer:

Computer disks are $4 each

Notebooks are $3 each

Step-by-step explanation:

For the first equation

<em>$4 x 2 disks = $8</em>

<em>$3 x 3 notebooks = $9</em>

<em>$9 + $8 = </em>$17

For the second equation

<em>$4 x 5 disks = $20</em>

<em>$3 x 4 notebooks = $12</em>

<em>$20 + $12 = </em>$32

3 0
3 years ago
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