2x - 9 = x + 3
me i’ve been having trouble to understand so if you can explain it, it would a lot.

First you must combine (aka sum) like terms.

Like terms are numbers that have matching variables OR are numbers with out variables. In this case the like terms are 2x and x (they both have the variable x); -9 and 3 (both numbers without variables)

Now you may be asking, how will x get to the left side of the equation, and how will -9 get to the right side of the equation? Let's first focus on getting x to the left side of the equation:

To bring x to the left side by subtracting x to both sides (what you do on one side you must do to the other). Since x is being added on the right side, subtraction (the opposite of addition) will cancel it out (make it zero) from the right side and bring it over to the left side.

2x - x - 9 = x - x + 3

x - 9 = 0 + 3

x - 9 = 3

Now lets bring -9 to the right side:

To do this add 9 to both sides (what you do on one side you must do to the other).  Since 9 is negative on the left side, addition (the opposite of subtraction/negative) will cancel it out (make it zero) from the left side and bring it over to the right side.

x - 9 + 9 = 3 + 9

x + 0 = 12

x = 12

Hope this helped!

~Just a girl in love with Shawn Mendes

3.4 pizzas

step-by-step explanation:

given is a scatter plot showing number of pizzas sold during weeks for different issues of coupon

y represents number of pizzas sold and x number of coupons issued

y is marked verticaly and x horizontally

the trend line is given as

y =3.4x+43

this says that even when no coupon is issued pizzas sold will be 43

and rate of change of pizza sold for 1 unit of coupon = slope = 3.4

i.e. when x increases by 1 unit y increases by 3.4 units

hence for each additional coupon issued 3.4 pizzas more will be sold

start with a line segment pq that we will copy. mark a point r that will be one endpoint of the new line segment. set the compasses' point on the point p of the line segment to be copied. adjust the compasses' width to the point q. the compasses' width is now equal to the length of the line segment pq.

step-by-step explanation: