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laila [671]
3 years ago
5

Let s be the sum of all digits used in writing all numbers from 1 to 1010.find s

Mathematics
1 answer:
Sophie [7]3 years ago
6 0
We know, s = n/2 [a + l ]
Here, n = 1010
a = 1
l = 1010

Substitute their values, 
s = 1010/2 [1 + 1010]
s = 505 [ 1011]
s = 510555

In short, Your Answer would be 5,10,555

Hope this helps!
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7a-4b=2b-5a solve for a
uysha [10]

Step-by-step explanation:

7a - 4b = 2b - 5a

7a + 5a = 2b + 4b

12a = 6b

a = 6b/12

a = b/2

5 0
3 years ago
I'm sry pls help! im bad at math:(((​
Basile [38]
Choice B: I’m good a math and

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3 years ago
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QveST [7]

Answer:

<em>The age of the oldest child id 7.</em>

Step-by-step explanation:

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1st Child: 7 Years Old

2nd Child: 6 Years Old

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Hope this helped! :-)

3 0
3 years ago
Explain how finding 7x20 is similar to finding 7 x 2,000. Then find each product
Sphinxa [80]
7×20 and 7×2000 are similar. The amount of zeros are the dependent factor.

7×20= 140
7×2000= 14000

The base equation is 7×2=14
Any additions of zeroes in this formula will be added at the end result.

Ex.
7×2=14
7×20=140
7×200=1400
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5 0
3 years ago
PLEASE HELP ADSAPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPP!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
Rasek [7]

Answer:

Part A: (0.25+0.30+0.75) - 0.20

Part B:

Step-by-step explanation:

The jar contains 0.25 of apple juice and 0.30 liter of grape juice. Then, another 0.75 litter is added. Melissa drank 0.20 of that, making the value lower (Hint: subtraction).

So we have to add 0.25, 0.30, and 0.75. Subtract it by 0.20. My equation would look like:

(0.25+0.30+0.75) - 0.20

The simplified equation will be:

1.3 - 0.20

= 1.1

I used the associative property to simplify the parenthesed part of the equation, and subtracted it by 1.1. Even though it has been simplified, the result has no changed and it is still the same value as it would have been in the previous equation.

Best of luck, and have a blessed day! For any question or comments, please say so!

4 0
3 years ago
Read 2 more answers
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