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scoundrel [369]
3 years ago
9

Write the slope-intercept form of the equation of each line

Mathematics
1 answer:
lesya692 [45]3 years ago
4 0

Answer:

1.) y= \frac{1}{6} x + \frac{13}{6}

2.) y = \frac{4}{5} x - 3

3.) y = 3x - 2

4.) y = \frac{13}{7} x - 8

5.) y = \frac{1}{4} x + 4

6.) y = 9x - 1

7.) y = -\frac{1}{2} x - 4

8.) y = -\frac{10}{3} x + 2

9.) y = \frac{7}{8}x - 1

10.) y = -5

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Answer:

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In the image below, DE || BC. Find the measure of EC. Set up a proportion and solve for the measure. Show your work and label yo
mixer [17]

The missing figure is attached down

Answer:

The measure of EC is 1 foot

Step-by-step explanation:

Let us revise the cases of similarity

  • AAA similarity : two triangles are similar if all three angles in the first triangle equal the corresponding angle in the second triangle
  • AA similarity : If two angles of one triangle are equal to the  corresponding angles of the other triangle, then the two triangles  are similar.
  • SSS similarity : If the corresponding sides of the two triangles are  proportional, then the two triangles are similar.
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From the attached figure

∵ DE // BC

∴ ∠ADE ≅ ABC ⇒ corresponding angles

∴ ∠AED ≅ ACB ⇒ corresponding angles

In Δs ADE and ABC

∵ ∠ADE ≅ ABC ⇒ proved

∵ ∠AED ≅ ACB ⇒ proved

∵ ∠A is a common angle in the two triangles

∴ Δ ADE is similar to triangle ABC by AAA postulate

From the results of similarity the corresponding sides of the triangles are proportion

∴ \frac{AD}{AB}=\frac{DE}{BC}=\frac{AE}{AC}

∵ AD = 8 feet

∵ DB = 2 feet

∴ AB = AD + DB

∴ AB = 8 + 2 = 10 feet

∵ AE = 4 feet

By using the proportion statement above  \frac{AD}{AB}=\frac{AE}{AC}

∴ \frac{8}{10}=\frac{4}{AC}

By using cross multiplication

∴ 8 × AC = 10 × 4

∴ 8 AC = 40

Divide both sides by 8

∴ AC = 5 feet

∵ AC = AE + EC

∴ 5 = 4 + EC

Subtract 4 from both sides

∴ 1 = EC

∴ The measure of EC is 1 foot

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3 years ago
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