Answer:
20
Step-by-step explanation:
Answer:
100/5-4
Step-by-step explanation:
He spend 100 total, and he spend $5 on each book. So 100/5 would give him how many books total that he bought. If he bought 4 extra you need to subtract that to find out how many books he originally wanted to buy.
Answer:
84x+10
Step-by-step explanation:
Ok, since 51x, x, and 33x all have x in it, you add them all together. From that, you should get 84x. We can not add 10 with anything, the expression in simplest form is 84x+10.
Answer:
If a number is a multiple of 2, it may NOT be a multiple of 4. An example would be the number 6.
, but
.
However, if a number is multiple of 4, it is guaranteed to be a multiple of 2, since 4 itself is a multiple of 2.
Example:

This is simply
.
It is a multiple of 2 twice.
Ans: about 5000 feet
Explanation: 10000 divided by 2 = 5000 feet (estimate)