Answer:
The exact same as subtracting.
Example
5 + (-2) = 3
Answer:
Step-by-step explanation:
(Let the point where the altitude from intersects be called as point .) First, let's find the area of parallelogram . The area of a parallelogram is simply , where is the parallelogram's base and is the parallelogram's height. If we let and be the base and height respectively, since we are already given their lengths, we know that the area of parallelogram will be .
Now, how does this information matter, you might ask? Well, we can take either <em>or </em> to be the base and either or to be the height. In this case, let's take the latter two options, as we are looking to find the length of .
Therefore, we know that the area of parallelogram can also be found by calculating . Since we know the values of the area and , we can write the following equation to solve for :
(Substitute and into the equation)
(Divide both sides of the equation by to get rid of 's coefficient)
(Simplify)
(Symmetric Property of Equality)
Hope this helps!
2.40
5.40-2.40= 3 (price of 2 sodas)
8.70 - 7.20 = 1.5 (price of 1 soda)
The soda prices match up so a hamburger is 2.40
Y = mx + b
m is your slope AKA rate of change
b is the y intercept.
from the graph we can see that the y intercept (b) is 15. (look at the y axis and see what point the line crosses on the y, here it is 15, in-between 10 and 20)
slope is rate of change. to figure this out remember slope = rise over run:
so pick two points. how much does one point rise after the other point you picked? In the graph it rises 1 square so rise = 1
Now looking at the same two points, how far away from each other are they on the x axis? Looking at the graph they are 2 squares away from each other. so run = 2
Now plug these numbers into the rise over run formula:
Now we have everything we need to put into our formula for a line:
For number 16 you should get:
after you do the same steps again yourself