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Juli2301 [7.4K]
3 years ago
11

Weights of cars passing over Bridge part 3​

Mathematics
1 answer:
marin [14]3 years ago
8 0

Answer:

  d. 30.42%

Step-by-step explanation:

A suitable calculator pegs the probability of exceeding 0.51724 standard deviations above the mean as about 0.3025 = 30.25%. The closest answer is choice D.

  Z = (X -μ)/σ = (4000 -3550)/870 = 450/870 ≈ 0.51724

_____

<em>Comment on the answer choices</em>

30.42% is the probability of exceeding 3995 pounds, not 4000.

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Translate each verbal expression into an algebraic expression.
Semmy [17]

Answer:

10. 7 + 4a

11. 7a + 4

12. 12a - 4

13. 14(a - 4)

14. 2a + b

15. 2(a + b)

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17. 3x/8

18. ab / a+b

Step-by-step explanation:

Let x be the number.

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goblinko [34]

Answer:

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Step-by-step explanation:

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3 years ago
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Use the x-intercept method to find all real solutions of the equation.
elixir [45]

Answer:

I believe it would be D.

Step-by-step explanation:

3 0
3 years ago
a straight line has a equation 4x + 3y = 12 . find the gradient of the line and the coordinates of the point where this line cro
Komok [63]
4x + 3y = 12
3y = -4x + 12
y = -4/3x + 4........so the slope (or gradient) is -4/3...because in y = mx + b form, the slope(gradient) is in the m position and the y int is in the b position....so if u wanted to know the y axis, it would be (0,4)

the x intercept (where the line crosses the x axis) can be found by subbing in 0 for y in the original equation or the slope intercept equation, and solving for x.
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4 0
3 years ago
Give the domain and range.
alexgriva [62]

Answer:

c. domain: {-2, 0, 2}, range: {-1, 1, 3}

Step-by-step explanation:

Given:

There are three points on the graph.

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The points are (-2,-1),(0,1),\textrm{ and }(2,3)

Domain is the set of all possible x values. Here, the x values are -2, 0 and 2.

So, domain is: {-2, 0, 2}.

Range is set of all possible y values. Here, the y values are -1, 1 and 3.

So, range is: {-1, 1, 3}

7 0
3 years ago
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