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Which ordered pair is a solution of the equation y = 3x?

(1 point)
Responses

(–2, –9)
(–2, –9)
(–8, –18)
(–8, –18)
(–8, –3)
(–8, –3)
(–10, –30)
(–10, –30)

25 answers

None of the given ordered pairs is a solution of the equation y = 3x.
Which ordered pair is a solution of the equation y = –7x + 2?
(1 point)
Responses

(1, 2)
(1, 2)
(8, –54)
(8, –54)
(5, –35)
(5, –35)
(1, –7)
The ordered pair (1, -7) is a solution of the equation y = -7x + 2.
–4 = g + 1
To solve the equation -4 = g + 1, we can isolate the variable g by subtracting 1 from both sides:

-4 - 1 = g + 1 - 1

-5 = g

Therefore, g = -5.
w – 2 = –3
To solve the equation w - 2 = -3, we can isolate the variable w by adding 2 to both sides:

w - 2 + 2 = -3 + 2

w = -1

Therefore, w = -1.
6.4 = 4x
To solve the equation 6.4 = 4x, we need to isolate the variable x. We can do this by dividing both sides of the equation by 4:

6.4/4 = 4x/4

1.6 = x

Therefore, x = 1.6.
-8=z/3
To solve the equation -8 = z/3, we can isolate the variable z by multiplying both sides of the equation by 3:

-8 * 3 = z/3 * 3

-24 = z

Therefore, z = -24.
-9=5/17n
To solve the equation -9 = 5/17n, we can isolate the variable n by multiplying both sides of the equation by 17/5:

(-9)(17/5) = (5/17n)(17/5)

-153/5 = n

Therefore, n = -153/5 or -30.6.
Which equation is an identity?
(1 point)
Responses

11 – (2v + 3) = –2v – 8
11 – (2 v + 3) = –2 v – 8
5w + 8 – w = 6w – 2(w – 4)
5 w + 8 – w = 6 w – 2( w – 4)
7m – 2 = 8m + 4 – m
7 m – 2 = 8 m + 4 – m
8y + 9 = 8y – 3
The equation 8y + 9 = 8y - 3 is an identity.
7m – 2 = 8m + 4 – m
The equation 7m - 2 = 8m + 4 - m is not an identity, as it can be simplified further.

Let's solve the equation:

7m - 2 = 8m + 4 - m

Combine like terms:

7m - 2 = 7m + 4

Subtract 7m from both sides:

-2 = 4

This is a contradiction, as -2 cannot equal 4. Therefore, the equation is not an identity.
5v + 3 = 5v – 5
The equation 5v + 3 = 5v - 5 is an identity.
2x – 4 = 2x + 7 – x
The equation 2x - 4 = 2x + 7 - x is not an identity, as it can be simplified further.

Let's solve the equation:

2x - 4 = 2x + 7 - x

Combine like terms:

2x - 4 = x + 7

Subtract x from both sides:

x - 4 = 7

Add 4 to both sides:

x = 11

Therefore, the equation has a specific solution x = 11, and it is not an identity.
3(x – 7) – x = 2x – 21
The equation 3(x - 7) - x = 2x - 21 is an identity.
4 + 2y = 9 + 2y
The equation 4 + 2y = 9 + 2y is an identity.