Amy gets paid by the hour. Her little sister helps. As shown below, Amy gives her sister part of her earnings. Which equation represents Amy's pay when her sister's pay is $13?

13 =

Step-by-step explanation:

The first thing we need to do in this scenario is create an equation that represents the Amy's pay. We first need to find the portion of pay that Amy is giving her sister. We do this by dividing Amy's pay from her Sisters using the data attached below.

2 / 10 = 0.20 or 1/5

4 / 20 = 0.20 or 1/5

Therefore, we can see that her sisters earnings are 1/5 of Amy's pay. Therefore, we can simply multiply 1/5 to Amy's pay every time to get her sister's earnings (y). Which would give us the following formula...

y = x ... we can simplify this into...

y =

Finally, we can substitute y for the $13 that her sister earned to get the final equation for this exact scenario.

13 =

on friday there were 15 birds

exa:

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3+11

14

step-by-step explanation:

from this example, we can see that subtracting with integers is the same as adding the opposite. we can solve using a number line or by using the saying "keep, change, change" to us solve. it is important to remember that we can subtract a negative and end up with a larger number than we started with.