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Soloha48 [4]
3 years ago
11

A, B and C are integers. If B is greater than A, then the sum of A and B will always produce a solution C with the same sign as

B. True or false?
Mathematics
1 answer:
Misha Larkins [42]3 years ago
5 0
This would be false because it will depend on the actual values of both a and b, including if they are positive or negative.

This is true.

For example :

B = -6
A = -9

A + B = C = -6 + -9 = -15.

The value is C has the same sign as B.

B = 2
A = -5

A + B = -5 + 2 = -3.

Here The sign for C does not match the sign for B, which is positive.

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Sam has twice as many books as Jim. If Sam gives 12 books to Jim, they will have the same number of books. How many books do the
Neko [114]

Alright, lets get started.

Suppose number of books Jim have = x

Sam has twice as many books as Jim. So,

Number of books Sam have = 2x

If Sam gives 12 books to Jim, they will have the same number of books.

When Sam gives 12 books, his remaining books will be = 2x - 12

When Jim gets 12 books from Sam, his books will be = x + 12

And as per given question, they both now have equal books, so

2x - 12 = x + 12

Adding 12 in both sides

2x - 12 + 12 = x + 12 + 12

2x = x + 24

Subtracting x from both sides

2x - x = x + 24 - x

x = 24

It means Jim has number of books = 24

So, Sam has numberof books = 24 * 2 = 48

So, they have number of books together = 24 + 48 = 72 : Answer

Hope it will help :)


5 0
3 years ago
Read 2 more answers
The mean hours of sleep that students get per night is 7 hours, the standard deviation of hours of sleep is 1.7 hours, and the d
densk [106]

Answer:

c. 3.6 and 10.4 hrs

Step-by-step explanation:

The Empirical Rule states that, for a normally distributed random variable:

68% of the measures are within 1 standard deviation of the mean.

95% of the measures are within 2 standard deviations of the mean.

99.7% of the measures are within 3 standard deviations of the mean.

In this problem, we have that:

Mean 7, standard deviation 1.7.

For about 95% of students, nightly amount of sleep is between

7 - 2*1.7 = 7 - 3.4 = 3.6 hours

7 + 2*1.7 = 7 + 3.4 = 10.4 hours

So the correct answer is:

c. 3.6 and 10.4 hrs

5 0
3 years ago
2/3 (x-7) = -2 please please help!!
Maslowich

Answer:

x = 4.

Step-by-step explanation:

Distribute, isolate and solve.

3 0
3 years ago
What is the slope for y = 4 + 3x? *<br> Your answer
Leto [7]

Answer:

3

Step-by-step explanation:

5 0
2 years ago
What is the range of the function y= 2e^x -1 ?
PtichkaEL [24]

The range is all real number greater than - 1

6 0
3 years ago
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