Answer:
Step-by-step explanation:
Both of these questions involve proportions. You can set up an equation using equivalent fractions. You want to express to ratio of cm to km in Part A. Given the scale factor 5 cm = 2 km, then we can let c = the number of cm that represent an actual distance of 5 km. The following equation can be formed:
5/2 = c/5
Both of these fractions are a ratio of cm to km. To solve, we can cross-multiply.
2c = 25
c = 12.5 cm
You can use a similar process for Part B.
Answer:
y = - 1/4 x
Step-by-step explanation:
Look for the slope of this graph.
Take for an example of a point. Let's take (-4,1) and (0,0)
Now let's see how many downs and rights needed to go from (-4,1) to the origin (0,0).
As you can see, it goes 1 down and 4 rights.
So now you know the slope of the line which mean you can choose one of the choices now.
1 down, means negative one (-1), will be a numerator of the slope fraction and 4 right, meaning positive four (4), will be a denominator of the slope fraction.
<em>Note: This method is only available when you see two easy points to determine. In most cases you have to do the math using the slope formula.</em>
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Hope this helps
Answer:
IM DOING STUFF LIKE THAT
Step-by-step explanation:
Answer:
9+(5÷5)+2
Step-by-step explanation:
