It’s D, when lines are perpendicular, the slopes of the lines are opposite reciprocals.
Answer:
34
Step-by-step explanation:
Answer:
One time
Step-by-step explanation:
In both the numbers 72 and 78, the place value of 7 is 70.
Hence, 7 in 72 represents one time the value of the 7 in 78.
89 squared minus 39 squared and the answer you get is what you put into the radical
