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2 years ago

Explain how does knowing 1 + 7 helps you find the sum for 7 +1

Mathematics

2 answers:

AURORKA [14]2 years ago

5 0

Explanation: For this, we take two different numbers.

Let the first number be $x$ and the second number be $y$

We use the commutative property, which says that the sum will remain same in whatever way the numbers are written.

Mathematically,

$x+y=y+x$

From the question,

x = 1

y = 7

Putting this in the commutative property equation, we get:

$1+7=7+1$

Hence, the sum of both the umber will be same.

astra-53 [7]2 years ago

3 0

Well 1+7 =8
And 7+1 are the same digits so 1+7=7+1=8

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Answer:

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3 years ago

For the given term, find the binomial raised to the power , whose expansion it came from: 10a ^ 3 * b ^ 2 .

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2 years ago

Solve the system of equations x+y=-8 and -9x-6y=60 by combining the equations

TiliK225 [7]

Answer:

x = - 4 y = - 4

Step-by-step explanation:

x+y= - 8

-9x-6y=60

First, solve for x in the first equation:

x+y = - 8 Subtract y from both sides

x + y - y = -8 - y y cancels on the left

x = - 8 - y

Now plug in what you found for x into the 2nd equation and solve for y.

- 9x - 6y = 60

-9(- 8 - y) - 6y = 60 Multiply out

72 + 9y - 6y = 60

72 + 3y = 60 Subtract 72 from both sides

72 - 72 + 3y = 60 - 72 72 cancels on the left

3y = - 12 Divie both sides by 3

3y/3 = -12/3 3 cancels on the left because 3/3 = 1

y = -4

Now plug your answer for y back into the first equation to get x.

x + y = -8

x + (-4) = - 8 Add 4 to each side

x - 4 + 4 = - 8 + 4 4 cancels on the left

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2 years ago

There are 60 inches in 5feet. How many inches are in 8 feet ?

Murljashka [212]

Answer:

Step-by-step explanation:

Feet have 12 inches each to find the amount in x amount of inches let this equation help you

X=amount of inches

y= amount of feet

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2 years ago

3/4 x 3 2/5 - 5/5(find the value of each of the following)

Triss [41]

The value of the given expression is $\frac{-13}{20}.$

Solution:

Given expression is $\frac{3}{4} \times3\frac{2}{5}-\frac{5}{5}$ .

Let us first convert mixed fraction into improper fraction.

$3\frac{2}{5}=\frac{(3\times5)+2}{5}=\frac{17}{5}$

Substitute this in the given expression.

$\frac{3}{4} \times3\frac{2}{5}-\frac{5}{5}=\frac{3}{4} \times\frac{7}{15}-\frac{5}{5}$

$=\frac{21}{60}-\frac{5}{5}$

To simplify the above expression, 21 and 60 are cancelled by 3.

$=\frac{7}{20}-\frac{1}{1}$

Do cross multiplication to make the denominator same.

$=\frac{7}{20}-\frac{20}{20}$

$=\frac{7-20}{20}$

$=\frac{-13}{20}$

The value of the given expression is $\frac{-13}{20}.$

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2 years ago