The average would be the total amount divided by the 2 groups, so the answer would be 37.5 years old.
5 x 7 = 35 5 rows with 7 items in each row. You can put this down on paper and count each dot or just memorize 5 x 7 =35
Since the x value can be changed to anything other than 4 (because then you would be dividing by 0 in x-4), the answer is: All real numbers except 4.
Answer: x=7
Step-by-step explanation: First you distribute the 12 to (10-x). That then gives you 15x+120-12x=141. Now you combine like terms. So you do 15x-12x=3x. Your new equation now is 3x+120=141. Subtract 120 from 141 and mark it out. That leaves you with 3x=21. Divide both sides by 3. Your final answer is x=7.
I believe the answer is y= -3
