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Harrizon [31]
3 years ago
5

An equivalent expression for n x a using only addition

Mathematics
2 answers:
Rina8888 [55]3 years ago
6 0
<u /><u /><u />n\times a\quad =\quad (a+a+a+a+a+.....+a)

Bogdan [553]3 years ago
5 0

n x a = a _{1}  + a  _{2} + a  _{3} +  ... + a _{n}
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Step-by-step explanation:

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ad-work [718]

Answer:

a) 2

b) -\frac{1}{2}

c) y = 2x + 1

Step-by-step explanation:

a)

First put the equation into slope intersept form (y=mx+b) by...

  • Move the variable to the right-hand side and change its sign : -y = -4 -2x
  • Change the signs on both sides of the equation: y = 4 + 2x
  • Use the commutative property to reorder the terms : y = 2x + 4

Slope intersept form : y = 2x + 4

Parallel lines have the same slope so.... a parallel slope is 2

b)

First put the equation into slope intersept form (y=mx+b) by...

  • Move the variable to the right-hand side and change its sign : -y = -4 -2x
  • Change the signs on both sides of the equation: y = 4 + 2x
  • Use the commutative property to reorder the terms : y = 2x + 4

Slope intersept form : y = 2x + 4

To find a perpendicular slope flip the slope and change the sign : -\frac{1}{2}

c)

First put the equation into slope intersept form (y=mx+b) by...

  • Move the variable to the right-hand side and change its sign : -y = -4 -2x
  • Change the signs on both sides of the equation: y = 4 + 2x
  • Use the commutative property to reorder the terms : y = 2x + 4

Slope intersept form : y = 2x + 4, parellel slope : 2

  • Substitute the x and y values with the given ordered pair: 3 = 2(1) + b
  • Calculate the product: 3 = 2 + b
  • Move the variable to the left-hand side and change its sign: -x = 2 - 3
  • Calculate the difference and change the signs : b = 1

Use the slope and y-intersept (b) to write the new line : y = 2x + 4

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