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Nezavi [6.7K]
4 years ago
14

Step 1: Subtract 3 from both sides of the inequality. Step 2: __________ Step 3: Divide both sides of the inequality by the coef

ficient of x. What is the missing step in solving the inequality 5 – 8x < 2x + 3?
Mathematics
2 answers:
Dominik [7]4 years ago
5 0
I don't exactly know how to explain step 2 but the working is:
5 - 8x < 2x + 3
5 - 3 < 2x + 8x
2 < 10x
5 < x

(I'm sorry if it's wrong)
sukhopar [10]4 years ago
5 0

Answer:

Given inequality:  5-8x

Step 1. Subtract 3 from both sides of the inequality:

5-8x-3 or

2-8x

Step 2: Add 8x both sides of the inequality:

2-8x+8x or

2

Step 3: Divide both sides of the inequality by the coefficient of x (i.e, 10).

\frac{2}{10}< \frac{10x}{10}

Simplify:

\frac{1}{5}

Therefore, the missing steps is: Add 8x both sides of the inequality



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EXPLAIN THE ERROR Cody was given two points (1/2,4) and (2/3,1), on a line and asked to create a linear equation in standard for
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Answer:

Cody made a mistake when calculating the slope of the line and this affected every other steps after than.

She divided -3 by 6 instead of -3 by 1/6

Step-by-step explanation:

Given

(x_1,y_1) = (\frac{1}{2},4)

(x_2,y_2) = (\frac{2}{3},1)

<em>See attached for steps</em>

Required

Explain Cody's error

<em>Cody made a mistake when calculating the slope of the line and this affected every other steps after than.</em>

See Proof

Slope (m) is calculated as thus:

m =\frac{y_2 - y_1}{x_2 - x_1}

m =\frac{1 - 4}{\frac{2}{3} - \frac{1}{2}}

m =-\frac{ 3}{\frac{1}{6}}

m = -3/\frac{1}{6}

m = -3 * 6

m = -18

This is in contrast to m = -\frac{1}{2}, calculated by Cody

Solving further to determine the equation.

y - y_1 = m(x - x_1)

Where

(x_1,y_1) = (\frac{1}{2},4)

m = -18

y - 4 = -18(x - \frac{1}{2})

y - 4 = -18x + 9

Collect Like Terms

y + 18x = 9 + 4

y + 18x = 13

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Step-by-step explanation:

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