He need 7 blankets because if you take away 3 7 times from the 21 u get 0
In this problem, you are just being asked the distance between the numbers on the number line.
Example:
X=5, A= - 5
Count the spaces in between the 2 numbers... 5 is on the positive side, any number on the right of a number line is a positive number, and any number on the left of a number line is a negative.
so if you count down from positive 5 to 0, you have jest then moved 5 spaces backwards... now move back 5 again into the negative side, now you should have moved a total of 10 spaces coming from positive to negative.
Answer: All of the trianges in this problem set are congruent
Answer:
option B , I saw this question on a math website thats why its B
