Let g be the number of grandchildren, and d be the number of dogs. They both have only one head, so the number of heads is

Grandchildren have 2 legs, while dogs have 4. So, the total number of legs is

From the first equation (the one for the heads) we can derive

Substitute this into the second to get

So, there are 9 dogs and (from the first equation

1.) 5
2.) 9
3.) 1/2
4.) 0.5
5.) 1
6.) -8
Answer:
200 are on screen 1
125 are on screen 2
175 went to screen 3
Step-by-step explanation:
10% is 50 so 50 x 4 =200
25% of 500 is 12, divide 500 by 4
35% is 25% + 10% = 125 + 50 = 175
Answer:
25.
Step-by-step explanation:
50% = 1/2 and 1/2 of 50 is 25. so 50% is 25.