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Verdich [7]
2 years ago
9

On Friday, Debby borrowed $10 from her sister. The next day, she paid back $5 to her sister. On Monday, she borrowed $4 more. Wh

ich number sentence describes the amount Debby owes her sister?​
Mathematics
2 answers:
GalinKa [24]2 years ago
8 0

9

Step-by-step explanation:

Hey there mate ;)

As per question,

Debby borrowed $10, $4 and paid back $5

→10 + 4 - 5

→14 - 5

→9

So, the answer is <u>9</u>

boyakko [2]2 years ago
6 0

The amount of money Debby owes her sister is $9.

<h3>How much does Debby owe her sister? </h3>

When Debby borrows money, the amount of her debt increases and when she pays back her debt decreases. So, when she borrows, the amount she borrows is added and when she pays back, the amount is subtracted.

$10 - $5 + 4 = $9

To learn more about addition, please check: brainly.com/question/19628082

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Marla bought 12 books at a garage sale. Some of them were hardback and the rest were paperback. She paid $0.50 for each paperbac
olga nikolaevna [1]

Answer: The number of books bought were 9 paperbacks and 3 hardbacks

Step-by-step explanation: We shall start by assigning letters to the unknown variables, hence let the hardback be called h, while the paperback shall be called p.

If Marla bought 12 books at the garage sale, that means she bought

h + p  = 12 ------(1)

Then she paid 0.5 dollars for paperback and 0.75 dollars for hardback and the total spent was 6.75 dollars for all of them, then we can express these as follows;

0.5p + 0.75h = 6.75 ------(2)

We now have a pair of simultaneous equations which are

h + p = 12 ------(1)

0.5p + 0.75h = 6.75 ------(2)

From equation (1), make h the subject of the equation,

h = 12- p

Substitute for h into equation (2)

0.5p + 0.75(12 - p) = 6.75

0.5p + 9 - 0.75p = 6.75

0.5p - 0.75p = 6.75 - 9

-0.25p = -2.25

Divide both sides of the equation by -0.25

p = 9

Now, substitute for p into equation (1)

h + p = 12

h + 9 = 12

Subtract 9 from both sides of the equation

h = 3

Therefore Marla bought 9 paperbacks and 3 hardbacks

6 0
3 years ago
Read 2 more answers
Q.1. Base and height if a parallelogram 12 cm and 8 cm respectively. Find its area.​
irakobra [83]

Answer:

Area of the parallelogram is 96 cm^{2}.

Step-by-step explanation:

A parallelogram is a quadrilateral with parallel and equal length of opposite sides. The diagonals are perpendicular to each other.

Area of a parallelogram is given as,

Area = base x height

Thus for the given parallelogram with base 12 cm and height 8 cm, the area would be;

Area = base x height

        = 12 x 8

        = 96

Area = 96 cm^{2}

The area of the parallelogram is 96 cm^{2}.

3 0
3 years ago
Breakdown -3r+9= -4r+5
spayn [35]

Answer:

r=.57

Step-by-step explanation:

8 0
3 years ago
:D <br> I’m kinda confused with this need help
yan [13]

Answer: 2n + 1 = n + 11

3 0
3 years ago
Dentify the pattern for the following sequence. find the next three terms in the sequence. 5, 2, -1, -4, ____, ____, ____,...
kvasek [131]
Every time you are -3, the next terms would be -7, -10, -13
7 0
3 years ago
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