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How many quadrants x-axis and y-axis divide the coordinate plane into?
There are four quadrants (hence the name "quad"). Draw a crossing vertical line (Y axis) and horizontal line (X axis). The areas to the "top right", "bottom right", "bottom left" and "top left" are the four quadrants. Which quadrant any given co-ordinate lies in depends upon the sign of the X & Y values. eg (+X,+Y) (+X,-Y) (-X,-Y) or (-X,+Y) respectively.
When adding integers with the same sign add their absolute values and write the common sign?
That sounds sound.
Where is the equal sign on ti-84?
The equal sign is the same as the enter button
When solving an equation why is it necessary to perform the same operation on each side of the equals sign?
If two things are equal (as implied by the equals sign), then if you do something to one of those things (one side of the equal sign), unless you do the same to the other thing (the other side of the equals sign), then the two things will no longer be equal. Thus when solving, if you do not so the same to both sides, the sides will no longer be equal to each other and you will not solve the problem correctly.
What rule allows us to change the sign of an exponent?
1 divided by a number with an exponent is the same as the number to the exponent of opposite sign. For example 1 divided by 2 to the third power is the same as 2 to the minus 3 power
