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ohaa [14]
3 years ago
14

Use substitution to solvey=2x+1 y=x-5

Mathematics
1 answer:
nirvana33 [79]3 years ago
7 0
2x+1 = x-5
-x -x
X+1 = -5
-1 -1

X = -6

2(-6) +1= y
-12+1= y

-11 = y

-11 = -12+1
-11 = -6-5
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Step-by-step explanation:

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In ΔNOP, o = 130 cm, ∠O=61° and ∠P=40°. Find the length of n, to the nearest 10th of a centimeter.
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A fleet of vehicles is comprised of 60 vans, 20 limos, and X sedans. If 10% of all vehicles are limos, how many sedans are in th
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Erika worked 14 hours last week and 20 hours this week. If she earns $9 per hour, how much did she earn these two weeks?
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Hello Brainly Teacher Brainly Moderators and trusted helpers!​
tatyana61 [14]

Answer:

  • P(x < 84) = 0.3085 or approximately 31%

============

<em>Hello to you from Brainly team!</em>

<h3>Given</h3>

  • Mean grade μ = 86,
  • Standard deviation σ = 4,
  • Grade limit x = 84.

<h3>To find </h3>

  • Probability of that a randomly selected grade is less than 84 or P(x < 84).

<h3>Solution</h3>

Find z-score using relevant equation:

  • z = (x - μ)/σ

Substitute values and calculate:

  • z = (84 - 86)/4 = - 0.5

Using the z-score table find the corresponding P- value.

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4 0
1 year ago
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