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Talja [164]
3 years ago
13

9 times (30+7=(9 times _)+(9 times 7)

imes%20" id="TexFormula1" title="9 \times (30 + 7) = (9 \times " alt="9 \times (30 + 7) = (9 \times " align="absmiddle" class="latex-formula">
Mathematics
2 answers:
Arada [10]3 years ago
8 0

9(30+7) = (9*30)+(9*7)

This is the distributive property

x(y+z) = xy + xz

Let the dash = x

9(30+7) = (9*x)+(9*7)

9(37) = 9x + 63

333 = 9x + 63

Substract 63 from both sides

333 - 63 = 9x +63-63

270 = 9x

Divide both sides by 9

270/9 = 9x/9

30 = x

Or x = 30

frez [133]3 years ago
6 0

Answer:

9(30+7) = (9*30)+(9*7)

Step-by-step explanation:

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Which is another way to check the sum of 104+34+228+877?
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The answer is digit sum method.

Digit sum method is method used to check the sum of sum numbers. If the sum of all of the digits of numbers is equal to the sum of all of the digits of the total sum, then the arithmetic process was correct.

We need to check the sum of <span>104+34+228+877:
</span>104 + 34 + 228 + 877 = 1243

Let's first summarize the digits of individual numbers:
104 *** 1 + 0 + 4 = 5
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228 *** 2 + 2 + 8 = 12 *** 1 + 2 = 3
877 *** 8 + 7 + 7 = 22 *** 2 + 2 = 4

Now, let's sum these sums:
5 + 7 + 3 + 4 = 19 *** 1 + 9 = 10 *** 1 + 0 = <u><em>1</em></u>

Then, let's summarize the digits of the total sum:
1243 *** 1 + 2 + 4 + 3 = 10 *** 1 + 0 = <u><em>1</em></u>

Since the sums of the digits on the both sides of equation is 1, than the arithmetic process was correct and the sum of <span>104 + 34 + 228 + 877 is really 1243.</span>

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4 years ago
Hary purchased a coat. It was priced at 82$ he had a coupon for a 20% discount. What was the price of the coat after the discoun
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Answer:

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Step-by-step explanation:

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The answer is

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