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Vedmedyk [2.9K]
3 years ago
11

Jordan solved the equation −7x + 25 = 48; his work is shown below. Identify the error and where it was made. −7x + 25 = 48 Step

1: −7x + 25 − 25 = 48 − 25 Step 2: −7x = 23 Step 3: negative seven times x over seven = twenty-three over seven Step 4: x = twenty-three over seven Step 1: He should have added 25 to each side. Step 1: He should have divided both sides by −7. Step 3: He should have divided both sides by −7. Step 3: He should have multiplied both sides by −7.
Mathematics
1 answer:
almond37 [142]3 years ago
6 0

Answer:

Step 4 : he should have divided both sides by negative seven

Step-by-step explanation:

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<h2>Answers:</h2>

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Question 2: Option B (y = 2x + 1)

<h2>Explanations:</h2><h3>For Question 1:</h3>

Both equations are written in slope intercept form.

y = mx+b\\\\\text{m - slope}\\\text{b - y-intercept}

The equations we have are:

\left \{ {{y=2x} \atop {y=2x-7}} \right.

Both equations share the same slope of 2. However, they have different y-intercepts.

y = 2x can be written as y = 2x + 0.

Usually if you only have the slope in your equation then the y-intercept is the origin, or (0, 0).

The second equation's y-intercept is -7. It takes 'b's place.

<h3>For Question 2: </h3>

We are given a graph and we need to find a equation.

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Since y = 2x + 1 is the only option with 1 as the y - intercept, it should be the correct answer.

I'll do the slope as well to verify our answer.

I will use the points (-1, -1) and (1, 3).

m=\frac{3-(-1)}{1-(-1)}=\frac{4}{2} =\boxed{2}

The correct answer should be y = 2x+1.

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Step-by-step explanation:

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