Answer: c
Step-by-step explanation:
105 x 4 = 420
63 x 7 = 441
420 + 441 = 861
There is no formula for finding prime numbers. The rule is just if a number is prime then it is divisible by 1 and itself
I didn't do anything but yay
The answer for number one is d because 7 multiply by5 is 35
The answer for number two is a
180, is the answer because when I had a question like that you have to add
