Cual conclusión es correcta en relaciones con la ecuaciones 2x-4y=8.​

Astore sells two types of radios. one type sells $87 and the other for $119. if 25 were sold and the sales were $2495, how many of the $87 radios were sold a) 5 b) 20 c) 15 d)10

How many 3-digit numbers can you write using only digits 1 and 7? (of course, digits can repeat.) how many 3-digit numbers can you write using only digits 1 and 7? (of course, digits can repeat.)

If each bricks costs and he can only buy one brick how much will it cost him to get the material to put around the outside of his garden?