Answer:
He is 13 years old
Step-by-step explanation:
32-45=-13
the opposite of -13 is positive 13
Answer:
-21
Step-by-step explanation:
Since these are both right triangles, the answer must be ∠ABC=90°. Hope this helps!
The easiest way I know is to multiply the divisor by different numbers to see how many times it will go into the dividend. multiplying 486 by 2 or three and seeing which one gets closest.