MATHEMATICS HIGH SCHOOL

PLZ HELP  MEWhich pair of fractions is equivalent to this pair: 3/5 and 2/7 ?

A.
21/35 and 10/35

B.
10/35 and 7/35

C.
7/35 and 5/35

D.
24/35 and 12/35

Answers

Answer 1
Answer: To find equivalent fractions, multiply both sides of the fraction by the same number.
3*7=21. 5*7=35.

2*5=10. 7*5=35.

So the answer is A.

:) 

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PLSSSSSSSSSSS HEEEEEELP????The mean of a set of normally distributed data is 600 with a standard deviation of 20. What percent of the data is between 580 and 620?

Answers

Answer:

The percentage of the data between 580 and 620 is 68.26 %

Step-by-step explanation:

Given,

Mean, \mu = 600,

Standard deviation, \sigma = 20,

Using the equation,

z-score=(x-\mu)/(\sigma)

Z-score for the data 580 = (580-600)/(20)

=(-20)/(20)

=-1

While, the z-score for the data 620 = (620-600)/(20)

=(20)/(20)

=1

Using normal distribution table,

P(580 < z) = 0.1587

Also, P(620 > z) = 0.8413

Hence, the percent of the data is between 580 and 620 = P(620 > z)  - P(580 < z)

= 0.8413  - 0.1587

= 0.6826

= 68.26 %
z = (X-Mean)/SD 
z1 = (580-600)/20 = - 1 
z2 = (620-600)/20 = + 1 
According to the Empirical Rule 68-95-99.7 
Mean +/- 1*SD covers 68% of the values 
Therefore, required percent is 68%
hopes this help :) :D :)

What are the coordinates of the midpoint of the line segment with endpoints R(4,−7) and S(−3,5)?

Answers

the coordinates of the midpoint is (7/2,6)

Can someon plz help me solve this PLzzzzzzzzzzzzzzzzzzzz!!!!!!!!!!!!!!!!!!!!!!!!!!!!32-6x+7x=-15+28

Answers

=>32 - 6x + 7x = -15 + 28
=>32 - 6x + 7x + 15 -28 =0
=>32 -28 + 15 -6x + 7x =0
=>19 + x =0
=>x = -19 

Hope it helps !!!
If you go to mathway . com you can put ANY problem in and it will tell you.

The figure shows eight congruent triangles made by dividing a square that has an area of 64 cm2. What is the area of ABH? A. 20 cm2

B. 16 cm2

C. 8 cm2

D. 6 cm2

E. 4 cm2

Answers

The answer is C) 8 cm squared.

That is because 64/8 = 8 cm squared. Hope this helps!!!

Answer:

C. 8 cm2

Step-by-step explanation:

If the big square is 64 cm2, then each side is 8 cm (8cm x 8cm = 64 cm2)

Each of the small squares then has both sides of half the side of the big one, then, each small square has 4cm x 4cm = 16 cm2

Ihen, each small triangle's area (such as ABH) is (b.h)/2, being the base and the height equal to the sides of the small square. Each small triangle is (4cm x 4cm)/2=8cm2

Line ZR bisects ∠QTS. Which is true? A. m∠QTR = m∠RTS B. m∠ZTS = m∠RTS C. m∠ZTQ = m∠QTR D. m∠STR < m∠QTR

Answers

Is the choice A:    m∠QTR = m∠RTS]

PLS HELP ME OUT REWARD GUARANTEE!!!!!!!!!!!!!The fat content for seven different sandwiches at a restaurant is 42, 61, 13, 9, 12, 42, and 62. Find the mean, median and mode of the fat contents.

Answers

Mean: subtract the smallest number from the biggest number...62-9=?Median: the middle number, order the numbers from smallest to biggest....Mode: the number that is repeated the most...This should help you. I do not want to give you the answers. I want you to do them yourself with the instructions I gave you and then come back and post them when you are done so I may check them. Okay?
Mean: \bar{x} = (x_(1) + x_(2) + x_(3) + x_(4) + x_(5) + x_(6) + x_(7))/(n)
           \bar{x} = (42 + 61 + 13 + 9 + 12 + 42 + 62)/(7)
           \bar{x} = (241)/(7)
           \bar{x} = 34(3)/(7)

Median: 9, 12, 13, 42, 42, 61, 62
                              42

Mode: 42
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