In the triangle below, what is the length of EF?

EF

Step-by-step explanation:

This triangle is symmetric with respect to a vertical line drawn through the upper vertex.  Thus, the length of EF is 12.

d i think

step-by-step explanation:

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.