3 years ago

Identify the expression as a numerical expression or variable expression I•8

Mathematics

1 answer:

user100 [1]3 years ago

6 0

A is the answer because the number 8 is a constant. and the multiplication sign is the operator.

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The heights of 200 adults were recorded and divided into two categories.

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The answer is the first chart which would be A

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\frac{3}{10} = \frac{x}{x + 2}103=x+2x

a_sh-v [17]

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larisa [96]

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Solve using the elimination method:<br> X-3y=7<br> 3x + 3y=9

sergij07 [2.7K]

Answer:

$x=4\\\\y=-1$

Step-by-step explanation:

Given Equation:

$x-3y=7$ Equation:1

$3x + 3y=9$ Equation:2

Dividing Equation:2 by '3' both the sides:

$x+y=3$

or $x=3-y$ Equation:3

Putting the vale of 'x' in Equation:1

$x-3y=7$

$(3-y)-3y=7\\\\3-y-3y=7\\\\3-4y=7\\\\$

Subtracting '3' both sides

$-4y=7-3\\\\-4y=4$

$y=\frac{4}{-4}$

$y=-1$

Putting value of 'y' in Equation:3

$x=3-y$

$x=3-(-1)\\\\x=3+1\\\\x=4$

The solution of the equations is :

$x=4\\\\y=-1$

7 0

3 years ago

Plz help me you know why idk

il63 [147K]

____________________

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