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3 years ago

The sum of two integers is -13. Their difference is 7. What are the two integers?

Mathematics

1 answer:

Darya [45]3 years ago

7 0

The two integers are -3 and -10

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Archy [21]

17 books in total, and 8 new. To find the number of used books, we subtract 8 from 17.

17-8= 9 used books

Now we have 8 new books and 9 used books.

All books: 17
Used books: 9
New books: 8

(a) all books: used books
17: 9

(b) new books: used books
8: 9

7 0

3 years ago

Read 2 more answers

The sum of two integers is 8 and their product is -20. What are the integers?

emmasim [6.3K]

Answer:

The answer to your question is

x = -2 and y = 10 or x = 10 and y = -2

Step-by-step explanation:

x + y = 8 (1) from (1) x = 8 - y

xy = - 20 (2)

Solve them by substitution

(8 - y) y = - 20

8y - y² = -20

y² - 8y - 20 = 0

( y - 10) (y + 2) = 0

y - 10 = 0 and y + 2 = 0

y1 = 10 y2 = -2

x1 = 8 - 10 x2 = 8 - -2

x1 = -2 x2 = 10

8 0

3 years ago

Ater a blizzard the amount of snow on the ground melted by 3 inches one day and then another 8 inches the next day. Write an exp

Hoochie [10]

Answer:

11 inches

Step-by-step explanation:

Let the level of ground level be g

On first day, amount of snow melted by 3 inches

So, level of ground melted= (g- 3) inches

Next day, amount of snow melted by 8 inches

So, level of ground level melted = (g- 3-8 )inches

Hence, total change in the ground level = ( g- 11) inches

Hence, amount of snow on ground level melted by 11 inches

Hence, the correct answer is 11 inches

6 0

3 years ago

Jo's mother, Anne, is four times as old as Jo. In four years time, Anne will be three times as old as Jo. How old is Jo? (this i

pentagon [3]

Answer:

Jo's age = x = 8 years

Step-by-step explanation:

Let

Jo's age = x

Jo's mother, Anne's age = 4x

In four years time, Anne will be three times as old as Jo.

Jo's age =3( x + 4)

Jo's mother, Anne's age = 4x + 4

How old is Jo?

Equate Jo's age and his mother's age

3(x + 4) = 4x + 4

3x + 12 = 4x + 4

3x - 4x = 4 - 12

-x = - 8

Divide both sides by -1

x = 8

Therefore,

Jo's age = x = 8 years

8 0

3 years ago

Read 2 more answers

0.0833 to a fraction

choli [55]

Answer:

833/10000 fraction 83.3 percentage

Step-by-step explanation:

4 0

3 years ago