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morpeh [17]
3 years ago
14

how do i solve this. show all steps plz. this due very soon. help asap no idea what to do. ➡️MAKE SURE TO SHOW ALL STEPS!!!⬅️

Mathematics
1 answer:
Dmitry [639]3 years ago
5 0
Add the length and width of rectangle A and set equal to the sum of the length and width of rectangle B.
Then solve for d.
Once you know d, substitute it in each length and width to find the actual lengths and widths.

0.7d + 1 + 1.5d - 2 = 2.5 + d + 4 - 1.3d

2.2d - 1 = -0.3d + 6.5

2.5d = 7.5

d = 3

Rectangle A:
Length: 0.7d + 1 = 0.7(3) + 1 = 2.1 + 1 = 3.1
Width: 1.5d - 2 = 1.5(3) - 2 = 4.5 - 2 = 2.5

Rectangle B:
Length: 2.5 + d = 2.5 + 3 = 5.5
Width: 4 - 1.3d = 4 - 1.3(3) = 4 - 3.9 = 0.1
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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.

3 0
3 years ago
PLEASE HELP THIS IS SERIOUS DUE IN 5 MINS
Blizzard [7]

Answer:

You didn't add a specific time frame so I can you a correct answer.

Explanation:

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5 0
3 years ago
Read 2 more answers
If it's 11:51 right now. what time will not be in 11 hours and 37 minutes ?
AfilCa [17]

Answer:

11:52...

Step-by-step explanation:

11:52. It could be any time except the time 11:37 from now, since its NOT going to be.

Hope this helps!

6 0
3 years ago
Read 2 more answers
Simplify 6/sqr3+2<br> NEED HELP PLZ!!
mote1985 [20]

Answer:

1.61

Step-by-step explanation:

6/((sqrt3)+2) in a calculator

5 0
2 years ago
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A bathtub contains 20 gallons of water. After the drain is opened, there are 14 gallons of water remaining after 30 seconds. Usi
leva [86]

Answer

a decrease of 0.2 gallons per second

Explanation

The drain was open for 30 seconds.

The water that ran out for 30 seconds = 20 - 14

= 6 gallons

Rate of decrease = (change in gallons)/(time taken)

= 6/30

= 0.2

The rate of change in the amount of water remaining in the tub per second will be the same as the one that ran out since the outlet is the same.

So the correct answer from the choices is "a decrease of 0.2 gallons per second".

7 0
3 years ago
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