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GaryK [48]
2 years ago
13

If mZDEC = (12x - 3), mZBCE =

Mathematics
1 answer:
kati45 [8]2 years ago
3 0

Answer:

Step-by-step explanation:

12x - 3 = 180 - (7x - 26) supplementary angles

19x = 209

   x = 11

m∠DEC = 12(11) - 3 = 129°

m∠BCE = 7(11) - 26 = 51°

M∠ADE = 129 - 72 = 57°  exterior angle rule

m∠EDB = 180 - 57 = 123° supplementary angles

m∠DBC = 57° corresponding angle to ADE

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I found the corresponding image. Pls. see attachment.

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8 0
3 years ago
A train travels 56 kilometers in 4 hours, and then 90 kilometers in 2 hours. what is its average speed?
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6 0
3 years ago
1) Which is the slope in the following linear equation?
erik [133]

Answer:

C. 7

General Formulas and Concepts:

<u>Algebra I</u>

Slope-Intercept Form: y = mx + b

  • m - slope
  • b - y-intercept

Step-by-step explanation:

<u>Step 1: Define</u>

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<u>Step 2: Break Function</u>

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8 0
3 years ago
Given that 10% of the nails made using a certain manufacturing process have a length less than 2.48 inches, while 5% have a leng
zvonat [6]

Answer:

The mean, μ is 2.5063 and

The standard deviation, σ = 2.0499 × 10⁻²

Step-by-step explanation:

Here we have

z = \frac{x- \mu}{\sigma}

z \sigma ={x- \mu}{} and

10% have length < 2.48 in while

5% have length > 2.54 in

and

From the z score table

Critical z at 10% to the left = -1.282

Critical z at 5% to the right = 1.645

Therefore, the equations become

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Solving the above equations gives

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The standard deviation, σ = 2.0499 × 10⁻².

7 0
3 years ago
Who is correct chris or sam
Advocard [28]
Lacey, because you have to do the opposite when you want to get rid of a number. She subtracted 20 because it was originally positive 20. Chris messed up and did not do the opposite, subtraction, and instead he added 20
4 0
3 years ago
Read 2 more answers
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