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Ne4ueva [31]
3 years ago
14

Help really need answer. Thanks

Mathematics
1 answer:
bazaltina [42]3 years ago
3 0

Answer:

The answer is 28

Step-by-step explanation:

28×15=420 pages

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If the area of a rectangle is 12cm2 what could its length be and its width?
lawyer [7]
Hello, 

We know that th formula for the area of a rectangle is: A=b*h
Now, the problem in this excercise is that there is no restriction on the values that b and h can take, so, they can take any value provided that it meets:  b*h=12 cm^{2}
for example:
lenght=  \frac{12}{3}cm \,\,\,\,\,\,and\,\,\,\,width= 3 cm \\  \\ A=\frac{12}{3}cm*3cm \\ A=12 cm^{2}

But if they can only take intenger values, what we have to do is to descompose 12, and then we can analyze the possible solutions.

12   |  2
  6   |  2
  3   |  3
  1

12= 2 *2*3

first option:
12=4*3

Answer: lenght= 4cm   and   width= 3cm  or vice versa

second option:
12=2*6

Answer: lenght= 6cm   and   width= 2cm  <span>or vice versa</span>
7 0
3 years ago
In a science test. Devi scores 16 marks more than Ali. lf
sergeinik [125]

Let the marks of Devi be x and Ali be y.

So, the equations:

2y = x <em>and</em> y + 16 = x

So,

2y = y + 16. [ because we know equals are equal to equals]

=> 2y - y = 16

=> y = 16

Check

Ali's marks are half of Devi's marks.

Devi's marks are 16 more than alis.

So, Devi's marks will be 16×2 = 32 and 32 is 16 greater than 16 (16+16=32).

3 0
3 years ago
Which expression is equivalent to 5(d+1)
timurjin [86]

the answer you are looking for is 5d+5

5 0
4 years ago
Read 2 more answers
Please help!!! it will mean alot :/
ASHA 777 [7]

Answer:

Answwe is 44

Step-by-step explanation:

that the answer

8 0
2 years ago
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HELP MEEEEEEEEEEEEEEEEEE
const2013 [10]

Answer:

- 8 {x}^{2}  - x - 4

Step-by-step explanation:

Let's subtract:

( - 8 {x}^{2}  - 8) - (x - 4)

- 8 {x}^{2}  - 8 - x + 4

- 8 {x}^{2}  - x - 4

6 0
2 years ago
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