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Reika [66]
3 years ago
11

Explain why you can use subtraction to solve a division problem

Mathematics
1 answer:
rusak2 [61]3 years ago
7 0
If I understand your question clearly, the reason why you can use subtraction in a division problem is that, in order for you to find out what a remainder or mixed number is, you need to subtract. 

Example: Tamira has 60 bags of cookies to give out at her local community center, each person receives 5 cookies in a bag, how many people got a bag of cookies? Is there a remainder left?

So, after reading that problem, you already know you need to divide.


 5 )‾‾60‾‾‾‾   

How many times can 5 go into 6? 1 time. So, you put the 1 over the 6.

      1
5 )‾60‾‾‾‾‾‾
   -  5 
↓ 
 ______
     1 0

How many times can 5 go into 10? 2 times.

     12
5)‾‾60‾‾‾
     -5↓
_________
      10
     -10
  _______
        0

So, Tamira gave 12 people cookies with no remainder. And for when you need to find out the mixed number, it's the same process, but you go in the order of: quotient, remainder, dividend.

I hope I helped :)
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P(7) = \frac{1}{8}

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P(7) = \frac{1}{8}


4 0
3 years ago
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A B C D and F are questions about the picture please help!!
Lyrx [107]
I'm going to separate this into sections so it makes more sense for you to read. For the problems with π where you have to round, ask your teacher where to round, unless your textbook specifies it:

A – 100 cm^2

To calculate area of squares, you multiply l • w. It's a square, so all sides are equal, and since we know that one side = 10 cm, the area is 10 • 10 = 100

B – πr^2         (not sure if the r shows up very well, so I'm retyping it in words - pi • radius squared)

C – 25π cm^2 or an approximate round like 78.54 cm^2 (ask your teacher about this – it could be to the nearest tenth, hundredth, etc.)

To find the area of a circle, you must follow the formula πr^2. In this case, the diameter is 10. The radius is half the diameter, so to substitute the values you must find 10 ÷ 2 = 5. So the radius is 5 cm. From there you can substitute r for 5, ending up with π • 5^2.    5^2 = 25, so the area is 25π, or about 78.54, depending on where the question wants you to round.

D – An approximate round (to the nearest hundredth it is 21.46 cm^2)

To find the area of the shaded region, just subtract the circle's area from the square's area, or 100 – 25π ≈ 21.46. Again, though, ask your teacher about where to round, unless your textbook specifies it.

E – dπ      (diameter • pi)

F – 10π cm^2 or an approximate round like 31.42 cm^2

The diameter is 10. 10π ≈ 31.42

Hope this helps!
5 0
3 years ago
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2. 3 times the sum of a number x and 13
torisob [31]

Answer:

(x+13)2.3                 if simplifying.    

Step-by-step explanation:

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3 years ago
1. Find the slope of the line passing through the points (-3,7) and (7,7)
tatiyna

Answer:

1.=0

2.=undefined

Step-by-step explanation:

7-7/7--3

0/10

0

-5-3/-4-(-4)

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undefined

7 0
2 years ago
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Evaluate the expression with the given variable replacements.<br> 2x3 (if x = 3)
MArishka [77]

Answer:

if the expression is 2x^3 then answer is 54

Step-by-step explanation:

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substitute in x=3

2* (3)^3

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