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Reptile [31]
3 years ago
9

Can Someone please help me with this I don't know it?!?! I have a test on Friday!!! Thank You!

Mathematics
2 answers:
yuradex [85]3 years ago
6 0
The guy on top of me is right
aleksklad [387]3 years ago
3 0

Answer: a = 3.5

Step-by-step explanation:

14=4a

divide both sides by 4

14/4 = 3.5

4a/4 =1a or a

so a= 3.5

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7 0
3 years ago
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The mass of a species of mouse commonly found in houses is normally distributed with a mean of 20.2 grams with a standard deviat
Sophie [7]

Answer:

12.1%

Step-by-step explanation:

Given that:

Mean (μ) = 20.2 grams and standard deviation (σ) = 0.18 grams.

The z score is a score used to determine the number of standard deviations by which the raw score is above or below the mean. A positive z score means  that the raw score is above the mean and a negative z score means that the raw score is below the mean. It is given by:

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a) For x < 19.99 g:

z=\frac{x-\mu}{\sigma}\\\\z=\frac{19.99-20.2}{0.18} \\\\z=-1.17

From the normal distribution table, P(x < 19.99) = P(z < -1.17) = 0.1210 = 12.1%

The probability that a randomly chosen mouse has a mass of less than 19.99 grams is 12.1%

6 0
3 years ago
Using the graph, determine the coordinates of the roots of the parabola​
Nimfa-mama [501]

Answer:

(-1, 4)

Step-by-step explanation:

Use of the coordinate plane.

The vertex of the parabola is 1 to the left and up 4.

Think of the vertex as where the curve starts.

6 0
3 years ago
What is 9/4 + 2/3 please help me
Reptile [31]

Answer:

2 11/12 or 35/12

Step-by-step explanation:

8 0
3 years ago
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(6x2 -5x + 10) - (2x2 -x +13)
Sidana [21]

Answer:

-4x + 5 ?

sorry if wrong

6 0
3 years ago
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