3 years ago

Need some help on my math

Mathematics

1 answer:

SashulF [63]3 years ago

7 0

Answer:

2 and 9/10

Step-by-step explanation:

3 1/2 as an improper fraction is 7/2

7/2-3/5=2 9/10

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A group of 50 New York psychology students got a mean score of 530 on the psychology GRE with a standard deviation of 80. These

lesantik [10]

Answer: No, New York students are not truly more nerdy than the California students.

Step-by-step explanation:

Since we have given that

Number of students in a group = 50

Mean score of New York psychology = 530

Mean score of California psychology = 515

Standard deviation = 80

So, we will find t-distribution first.

$t=\dfrac{x-\mu}{\dfrac{\sigma}{\sqrt{n}}}\\\\t=\dfrac{530-515}{\dfrac{80}{\sqrt{50}}}\\\\t=1.32$

Let α = 5% = 0.05

So, $t_{\alpha,2}=2.920$

Since t < t(critical value)

No, New York students are not truly more nerdy than the California students.

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4 years ago

What is the equivalent fraction to -2_3

krok68 [10]

$-\dfrac{2}{3}=-\dfrac{2\cdot2}{3\cdot2}=-\dfrac{4}{6}=-\dfrac{2\cdot3}{3\cdot3}=-\dfrac{6}{9}=-\dfrac{2\cdot4}{3\cdot4}=-\dfrac{8}{12}=...$

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3 years ago

2x−(3x−4)=3x−5. pls solve

leva [86]

Answer:

x=9/4

Step-by-step explanation:

Performing the indicated multiplication, we get

2x - 3x + 4 = 3x - 5

Combining the x terms, we get -4x = -9, so that x = 9/4.

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3 years ago

And also this one too Thank you I'll name this first person brainliest

Advocard [28]

Answer:

Rectangular prism

Step-by-step explanation:

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3 years ago

When fully loaded 747 airplane flies at 475 .13 miles per hour. How far can a loaded 747 travel in 5.25 hours? round your answer

wlad13 [49]

Simply multiply the 475.13 miles to the 5.25 hours to get 2,494.43

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4 years ago