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Burka [1]
3 years ago
12

Solve for: 3/8 + (-7/8)=

Mathematics
2 answers:
Andrei [34K]3 years ago
7 0

Answer:

all work is pictured and shown

timofeeve [1]3 years ago
3 0

Answer:

-1/2

3/8 - 7/8

-4/8 = -1/2

Step-by-step explanation:

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There would be 19.2 cups. At least from what I am thinking of. So you would get 19 cups and about a fourth of another cup. I hope this helps! :)
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Why are tenths, fifths, and fourths easy to convert to percent's?
meriva
Because they all go into 100 easily. for example 10*10=100 5*20=100
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The value of a new car decreases by about 15% in the first year. How much will a car be worth after one year if its initial valu
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Answer:

$12,750

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3 years ago
Assume that different groups of couples use a particular method of gender selection and each couple gives birth to one baby. Thi
Dovator [93]

Complete question:

Assume that different groups of couples use a particular method of gender selection and each couple gives birth to one baby this mention is designed to increase the likelihood that each baby will be a girl, but assume that the method has no effect so the probability of a girl is 0.5. Assume that the group consists of 36 couples.

A) Find the mean and standard deviation for the number of girls in groups of 36 births.

B) Use the range rule of thumb to find the values separating results that are significantly low and significantly high.

C) Is the result of 33 girls significantly high? A result of 33 girls would suggest the method is effective or is not effective?

Answer:

a) mean = 18

Standard deviation =3

b) low range = 12

High range = 24

c) The result of 33 girls is significantly high. Yes, the method is effective.

Step-by-step explanation:

Given:

p = 0.5

n = 36

a) The mean is the product of n and p

Mean u = np

u = 36 * 0.5 = 18

The standard deviation is the square root of the product of n and p&q.

S.d ó = \sqrt{npq}

= \sqrt{np(1-p)}

= \sqrt{36(0.5)(1-0.5)} = \sqrt{9} = 3

b) To find the range rule of thumb:

• For low range

Low range = u - 2ó

= 18 - (2 * 3)

= 12

• High range

= u + 2ó

= 18 + (2*3)

= 24

c) The result is significantly high, because 33 is greater than 24 girls.

A result of 33 girls would prove the method as effective.

8 0
3 years ago
Marcia buys toys for $22.75 on sale. She gives the salesperson two $10 bills and one $5 dollar bill. How much change will Marcia
goldenfox [79]

Answer:

$2.25

Step-by-step explanation:

Marica pays with 2 $10 bills and 1 $5 bill, 10+10+5=25. Since she paid $22.75, her change would be 25-22.75=2.25.

5 0
2 years ago
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