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lisabon 2012 [21]
3 years ago
15

Pls help this is an ixl question and it really is hard

Mathematics
1 answer:
valentina_108 [34]3 years ago
7 0

Answer:

It would be the first one... 10:25

Step-by-step explanation:

10/4=2.5

2.5*10=25

2.5*4=10

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Bengus the expert blacksmith forged 16 swords from copper, 25 swords from iron, and 20 swords from mythril.
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almond37 [142]

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2 years ago
Data collected over a long period of time show that the length of time x to complete a particular college entrance test is norma
Finger [1]

Using the z-table, the probability that a student taking this test will finish in 100 minutes or less is 0.0824 or 8.24%.

For a normally distributed set of data, given the mean and standard deviation, the probability can be determined by solving the z-score and using the z-table.

First, solve for the z-score using the formula below.

z-score = (x – μ) / σ

where x = individual data value = 100

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σ = standard deviation = 18

z-score = (100 – 125) / 18

z-score = (-25) / 18

z-score = -1.39

Find the probability that corresponds to the z-score in the z-table. (see attached images)

-1.39 - (-1.3) : -1.4 - (-1.3) = x - 0.0968 : 0.0808 - 0.0968

-0.09 : -0.1 = x - 0.0968 : -0.016

x - 0.0968 = -0.09(-0.016)/-0.1

x = -0.0144 + 0.0968

x = 0.0824

x = 0.0824

Hence, the probability that a student taking this test will finish in 100 minutes or less is 0.0824 or 8.24%.

Learn more about probability here: brainly.com/question/26822684

#SPJ4

7 0
1 year ago
9 less than one-fifth of c
quester [9]

Answer: The equation in math form is \frac{1}{5}c - 9.

Step-by-step explanation:

So the givens are:

9 less than one-fifth of c

Let's put this equation in math form:

\frac{1}{5}c - 9

Hence your answer!

7 0
3 years ago
5x + 3 = 23 5. 4 = 3a – 14 6. 2y + 5 = 19 i need help with this equation
mrs_skeptik [129]

Answer:

Step-by-step explanation:

    5x + 3 = 23 x=4

5. 4 = 3a – 14 a=6

6. 2y + 5 = 19 y=7

6 0
3 years ago
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