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Kay [80]
3 years ago
13

Osvaldo’s teacher asked him to write an equivalent equation for length, l, in terms of perimeter, p, and width, w. He wrote: p =

2 l + 2 w His steps to solve were:1. Subtract 2 w. p minus 2 w = 2 l. 2. Multiply by 2. 2 (p minus 2 w) = l. His equivalent equation was l = 2 (p minus 2 w). Analyze Osvaldo’s work to determine where he made an error and what his error was. In step 1, he had to add 2w to both sides. In step 1, he had to divide both sides by 2w . In step 2, he had to divide both sides by 2. In step 2, he had to subtract 2 from both sides.
Mathematics
3 answers:
Sunny_sXe [5.5K]3 years ago
7 0

Answer: In step 2, he had to divide both sides by 2

Step-by-step explanation:

enot [183]3 years ago
5 0

Answer:

c.

Step-by-step explanation:

Naetoosmart3 years ago
0 1

the answer is (B) NOT C

shmexyElla
2 years ago
no, its c guys
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Pleaseeee i will mark brainlesttttt<br> solve this system of equations <br> 12x−15y=14 8x−15y=6
Sphinxa [80]

Answer:

x = 2 and  y = \frac{2}{3}

Step-by-step explanation:

To solve this system of equation, we will follow the steps below;

We will use both elimination and substitution method to solve this system of equations

12x−15y=14 ------------------------------------------------------------------------(1)

8x−15y=6 --------------------------------------------------------------------------(2)

subtract equation (2) from equation (1)

(By doing that the y  variable will be eliminated)

4x = 8

Divide both-side of the equation by 4

4x/4 = 8/4

x = 2

Substitute x =2 into equation (2) and then solve for y

8x−15y=6

8(2)−15y=6

16 - 15y = 6

subtract 16 from both-side of the equation

16 - 16- 15y = 6-16

-15y = -10

Divide both-side of the equation by -15

-15y/-15  = -10/-15

y = \frac{2}{3}

x = 2 and  y = \frac{2}{3}

3 0
3 years ago
Ms. Johnson was grading Drake's test. Drake got 27 out of 30 questions correct. What percent is equivalent to the fraction of th
andreev551 [17]
27/30 as a percentage is 90%
5 0
3 years ago
Una botella pesa 1090kg cuando esta llena y 250g cuando esta vacía. ¿Cuanta masa de aceite contiene la botella?
Hitman42 [59]

Respuesta:

1089,75 kg

Explicación paso a paso:

Dado que :

Masa de embotellado lleno = 1090 kg

Masa de la botella vacía = 250 g

Masa de aceite que contiene la botella:

Expresando la masa de la botella cuando se llena en gramos:

1000 g = 1 kg

1090 kg = (1090 * 1000) = 1090000 g

La masa de aceite que contiene la botella es así:

Masa de la botella cuando está llena - masa de la botella cuando está vacía

1090000 g - 250 g = 1089750 g

Por tanto, la masa de aceite es 1089750 g

O 1089750/1000 = 1089,75 kg

7 0
3 years ago
Rewrite in simplest terms: (-x+8y)+(-10x-6y)(−x+8y)+(−10x−6y)
Nina [5.8K]

Answer:

10x² - 48y² - 11x + 2y - 74xy

Step-by-step explanation:

(-x+8y)+(-10x-6y)(−x+8y)+(−10x−6y)

Rearranging,

=> - x - 10 x + 8y - 6y + (-10x-6y)(−x+8y)

=> - 11x + 2y + 10x² - 48y² + 6xy - 80xy

=> 10x² - 48y² - 11x + 2y - 74xy

7 0
3 years ago
You start at (4,5). You move down 3 units. Where do you end?
shtirl [24]

Answer:

(4,2)

Step-by-step explanation:

If you move from left to right your X will change if you move up or down your Y will change.

( can I have brainiest? )

5 0
2 years ago
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