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NISA [10]
3 years ago
5

4. Molly had $21 to spend on two notebooks. After buying them he had $13. How much did each notebook cost? 

Mathematics
2 answers:
otez555 [7]3 years ago
8 0
21-13=8
8/2=4
Each notebook costs $4
Hope this helps :)
blagie [28]3 years ago
3 0
First you do 21 - 13 and you get 8

8 divided by 2 notebooks = 4

Each notebook was $4.00

Hope this helps!
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Simplify the expression (9 + 21)(9 – 21).
Serhud [2]

Answer:

-360

Step-by-step explanation:

1. Add 9 + 21 and subtract 9 - 21

2. That would be (30)(-12)

3. Then multiply 30 x -12

4. You get -360

8 0
4 years ago
What is the area of this square?<br><br> 4 km<br><br> ____ square kilometers
KIM [24]

Answer:

4 kilometers.

Step-by-step explanation:

7 0
3 years ago
Find the coordinates of point G
LiRa [457]

Answer:

  G = (2, 9)

Step-by-step explanation:

The midpoint is the average of the endpoints, so we have ...

  M = (G+H)/2

Solving for G gives ...

  G = 2M -H = 2(5, 9) -(8, 9) = (10-8, 18-9)

  G = (2, 9)

3 0
3 years ago
The question is in the picture. The answer is 14 but I don't know how to get that.
andrezito [222]
Let's convert the problem into Arithmetic progression:
It would be: 5, 9, 13, .... 

Here, a = 5, d = 9 - 5 = 4
We know, S(n) = n/2 [ 2a + (n-1)d ]

Substitute the known values, 
434 = n/2 [ 2(5) + (n - 1)4 ]
434 * 2 = n [ 10 + 4n - 4 ]
868 = 10n + 4n² - 4n
= 4n² + 6n - 868 = 0

d = b² - 4ac
d = 6² - 4(4)(-868)
d = 36+13888
d = 13924

Now, roots = -b +- √d / 2a
= (-6 + √13924) / 2(4)   OR  (-6 - √13924) / 2(4)
= (-6 + 118) / 8   OR  (-6 - 118) / 8
= 112/8  OR  -124/8
= 14 OR -15.5

As number of sticks can't be in negative/decimal or fraction form, -15.5 would be fully rejected.

In short, Your Answer would be 14 [ Remaining root ]

Hope this helps!
7 0
3 years ago
Read 2 more answers
The ratio of the change in dimension at right angles to the applied force to the initial dimension is known as.
Elan Coil [88]

The ratio of the change in dimension at right angles to the applied force to the initial dimension is known as Lateral strain.

Here,

We have to find, The ratio of the change in dimension at right angles to the applied force to the initial dimension .

What is Lateral strain?

Whenever the bar is subjected to the axial load ,there will be decrease in the dimensions of the bar in the perpendicular direction of loading. Therefore lateral strain is defined as ratio of decrease in the length of the bar in the perpendicular direction of applied load to that of the original length (gauge length).

⇒ e = dB/B or dD/D

where, e= lateral strain

Now,

The ratio of the change in dimension at right angles to the applied force to the initial dimension is known as Lateral strain.

Learn more about the strain visit:

brainly.com/question/17046234

#SPJ4

7 0
2 years ago
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