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ivann1987 [24]
2 years ago
11

Which ordered pale is a solution to the system of equations?

Mathematics
1 answer:
Softa [21]2 years ago
5 0

Answer:

c) (-2, 1)

Step-by-step explanation:

3x - 3y = -9

2x + y = -3

2x + y = -3

-2x       -2x

y = -2x - 3

3x - 3y = -9

y = -2x - 3

3x - 3(-2x - 3) = -9

3x + 6x + 9 = -9

9x + 9 = -9

    - 9    -9

9x = -18

/9     /9

x = -2

y = -2x - 3

y = -2(-2) -3

y = 4 - 3

y = 1

(x, y) --> (-2,1)

Check your answer:

y = -2x - 3

1 = -2(-2) - 3

1 = 4 - 3

1 = 1

This statement is true

Hope this helps!

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Please help :) is it linear, if so model the data with and equation.
Yuki888 [10]

Answer:

The relationship is linear: y -5 = 2 (x+7)

Step-by-step explanation:

While the difference between -7 and -5 / -5 and -3 / -3 and -1 is always 2 teh difference between 5 and 9 / 9 and 13 / 13 and 17 is always 4.

y-5 = -1/2 (x +7)

for x= -7 and y = 5 this is true

for x=-5 and y = 9 this is not true

y + 7 = 1/2 (x-5)

for x= -7 and y = 5 this is not true

y -5 = 2 (x+7)

for x= -7 and y = 5 this is true

for x = -5 and y = 9 this is true

for x = -3 and y = 13 this is true

for x = -1 and y = 17 this is true

8 0
3 years ago
The area of a pentagon with a perimeter of 50 inches is 172.05 square inches . true or false
frez [133]

False

hopefully it will help

7 0
3 years ago
I need help with this please and thank you!
Vlad [161]

Answer:  2x^2      -16t

               25t         -20

Step-by-step explanation:

Multiply the corresponding terms to find out which answer belongs in each box. For the top left box you would multiply  5t x 4t = 20t^2. For the top right multiply -4 x 4t = -16t. For bottom left box multiply 5t x 5 = 25t and for the bottom right box multiple -4 x 5 = -20.

6 0
2 years ago
1. Which of the following is the standard form of y = (x – 3)(x – 7)?
Andrej [43]

9514 1404 393

Answer:

  b.  y = (x - 5)² - 4

Step-by-step explanation:

Here, we take "standard form" to mean "vertex form."

In the US, "standard form" would be ...

  y = x² -10x +21

Vertex form is ...

  y = (x -5)² -4 . . . . matches B

4 0
2 years ago
A sample of 1500 computer chips revealed that 55% of the chips do not fail in the first 1000 hours of their use. The company's p
Anvisha [2.4K]

Answer:

1.28

Step-by-step explanation:

Given that a sample of 1500 computer chips revealed that 55% of the chips do not fail in the first 1000 hours of their use. The company's promotional literature states that 53% of the chips do not fail in the first 1000 hours of their use.

H_0: p = 0.53\\\\H_a: p \neq 0.53

(Two tailed test for testing sample proportion with population proportion)

Std error of proportion assuming p = 0.53 is

\sqrt{0.53*0.47/1000} \\=0.0157

p difference = 0.02

Z= test statistic = p diff/std error = 1.2775~1.28

8 0
3 years ago
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