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Assoli18 [71]
3 years ago
10

Given: c(x) = 2x – 6 Find c(x) = 18

Mathematics
2 answers:
Alex3 years ago
4 0
18 = 2x -6 (Subtract 18 on both sides then subtract 2)
-2x = -6 -18
-6 -18 is = -24 (you add negative numbers together)
-2x = -24 (divide both numbers by -2)

X = 12
Ivanshal [37]3 years ago
4 0

Answer:

18

X = ---- , y = 12

c

Step-by-step explanation:

Solve for x, y

X = 18

__

c

Y = 12, c ≠ 0

Consider the first equation. Subtract 2y from both sides.

cx - 2y = -6

To solve a pair of equations using substitution, first solve one of the equations for one of the variables. Then substitute the result for that variable in the other equation.

cx = 18, cx - 2y = -6

Pick one of the two equations which is more simple to solve for x by isolating x on the left hand side of the equal sign.

cx = 18

Divide both sides by c.

18

X = __

c

Substitute 18/c for x in the other equation,

c x - 2y = - 6.

18

c x ( ---- ) - 2y = - 6

c

18

Multiply c times ----

c

18 - 2y = - 24

Subtract 18 from both sides of the equation.

- 2y = - 24

Divide both sides by -2.

y = 12

The system is now solved.

18

X = ---- , y = 12

C

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dimaraw [331]
Add 3.6 to both sides
-0.8≥1.6x
divide both sides by 1.6
-0.5≥x
x≤-0.5
so from -0.5, go to the left

that's the first graph
8 0
3 years ago
The given table of values represents a linear equation. What is the slope?
Mrac [35]

Answer:

C. 3

Step-by-step explanation:

Formula for slope is given as m = {y_2 - y_1}{x_2 - x_1}

The coordinates of any two points can be used in this formula. Let's use, (1, 5) and (2, 8).

Let,

(1, 5) = (x_1, y_1)

(2, 8) = (x_2, y_2)

Plug the values into the formula:

m = {8 - 5}{2 - 1}

m = {3}{1}

m = 3

4 0
4 years ago
Find the equation of the line going through the points (2,-1) and (5,2) 3x 2y
anastassius [24]

Answer:

The equation of the line is:

y = x - 3

Step-by-step explanation:

The general equation of a straight line is given by:

y = ax + b

Being given two points, we can replace x and y, solve the system and find the values for a and b.

Solution:

The line goes through the point (2,-1). It means that when x = 2, y = -1. Replacing in the equation:

y = ax + b

-1 = 2a + b

2a + b = -1

The line also goes through the point (5,2). It means that when x = 5 y = 2. Replacing in the equation:

y = ax + b

2 = 5a + b

5a + b = 2

Now we have to solve the following system of equations:

1) 2a + b = -1

2) 5a + b = 2

From 1), we have:

b = -1 - 2a

Replacing in 2)

5a - 1 - 2a = 2

3a = 3

a = \frac{3}{3}

a = 1

b = -1 - 2a = -1 - 2 = -3

The equation of the line is:

y = x - 3

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Lorico [155]
Answer: D
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5 0
3 years ago
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Evgesh-ka [11]

Answer:

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Step-by-step explanation:

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