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s344n2d4d5 [400]
3 years ago
14

What is the property of 21 times 9 = 9 times 21

Mathematics
2 answers:
zaharov [31]3 years ago
6 0
21 x 9 = 9 x 21 is the commutative property.
pantera1 [17]3 years ago
6 0

Answer:

communitive? I learned this years ago but I think this is correct

Step-by-step explanation:

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Step-by-step explanation:

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Find the equation of the line which passes through the point (7,2) and is perpendicular to y=5x-2
MariettaO [177]

Answer:

\displaystyle y=-\frac{1}{5}x+\frac{17}{5}

Step-by-step explanation:

<u>Equation of a line</u>

A line can be represented by an equation of the form

y=mx+b

Where x is the independent variable, m is the slope of the line, b is the y-intercept and y is the dependent variable.

We need to find the equation of the line passing through the point (7,2) and is perpendicular to the line y=5x-2.

Two lines with slopes m1 and m2 are perpendicular if:

m_1.m_2=-1

The given line has a slope m1=5, thus the slope of our required line is:

\displaystyle m_2=-\frac{1}{m_1}=-\frac{1}{5}

The equation of the line now can be expressed as:

\displaystyle y=-\frac{1}{5}x+b

We need to find the value of b, which can be done by using the point (7,2):

\displaystyle 2=-\frac{1}{5}*7+b

Operating:

\displaystyle 2=-\frac{7}{5}+b

Multiplying by 5:

10=-7+5b

Operating:

10+7=5b

Solving for b:

\displaystyle b=\frac{17}{5}

The equation of the line is:

\boxed{\displaystyle y=-\frac{1}{5}x+\frac{17}{5}}

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Answer: i cant see it

Step-by-step explanation:

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Please help me out. What is 421 divided by 27
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Answer:

15.5925925926

Step-by-step explanation:

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