She can use 68 + 20 = 88 to help by noticing that the 20 is ahead of 19 by 1. She can easily mentally turn the 20 into a 19 and realized that the 88 would become 87.
Answer:
x=2
Step-by-step explanation:
2x+8=8x-4
2x+12=8x
12=6x
2=x
x=2
Answer:
P'(4, 9)
Step-by-step explanation:
Add the translation vector to the point:
P' = P +(6, 5) = (-2, 4) +(6, 5) = (-2+6, 4+5)
P' = (4, 9)
Answer:
4 minus a number times three
