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NISA [10]
3 years ago
15

Find 51 • 49 using mental math. 2491 2499 2009 2509

Mathematics
2 answers:
Brut [27]3 years ago
7 0

Answer:

  51

  49

x____

459

2040<--- add zero place holder

+______

2499 is your answer

irga5000 [103]3 years ago
6 0

Answer:

2499

Step-by-step explanation:

Here's one mental approach:

51*49

(50+1)(50-1)

(a+b)(a-b)=a²-b²

(50+1)(50-1)=50²-1²

2500-1

2499

Or you could say (51*50)-51 = 2550-51 = 2499

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NemiM [27]

Answer:

4

45×4=180

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3 0
3 years ago
What is 6 1/4 - 3 1/3
Anettt [7]
Hey There!

Remember, first find the gcf of 4,3 in this problem it is 12.

Steps to solve

1.6\frac{1}{4} - 3\frac{1}{3}

2.6\frac{1}{4} - 3 \frac{1}{3} = 2\frac{11}{12}

So, The answer is <span>2\frac{11}{12}</span>

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6 0
3 years ago
Read 2 more answers
Find the least number by which 1470 must be divided to get a number which is the perfect square?
Nutka1998 [239]
1470|2\\.735|5\\.147|3\\.\ 49|7\\.\ \ \ 7|7\\.\ \ 1|\\\\1470=2\times5\times3\times7^2=30\times49\\\\Solution:this\ a\ number\ equal\ 30,\ because\ 1470:30=49=7^2
8 0
3 years ago
Find the missing value when given the modulus.
kolbaska11 [484]

Solving the complex number, we get the value of the missing value that is ‘a’ = -6

We  have been given the expression as

          |a – i| = √37          (1)

Which is an expression of complex number. The general expression of complex number is given as

    z = x + iy

 where x is the real part and iy is the imaginary part

To find the modulus value, the formula is given by,

  |z| = |x + iy|

   |z| = √[(real part)2 + (imaginary part)2]

 |z| = √(x2 + y2)

According to the question, |z| = √37         (2)

Equating equation (1) and (2), we get

√(a2 + 1) = √37

(a2 + 1) = 37

a2 = 37 – 1

a2 = 36

a = √36

a = ±6

Now value of a can be 6 or -6. We have been given that the modulus is in third quadrant.

Hence the value will be negative. Therefore, the missing value will be -6.

Learn more about complex number here : brainly.com/question/5564133

#SPJ9

3 0
2 years ago
Can someone help plsss asap
Bad White [126]

Answer:

6/18 x 4/6

Step-by-step explanation:

4 0
3 years ago
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