Hola, soy nueva aquí. Alguien podría ayudarme a resolver ésto, o explicarme como resolverlo, no le entiendo nada.
Mil gracias.​

Anyone know? is appreciated! will mark brainliest if correct!

Someone this asap for a group of students attends a basketball game. * the group buys x hot dogs at the concession stand for $2 each. * the group buys y drinks at the concession stand for $3 each. the group buys 29 items at the concession stand for a total of $70. how many hot dogs did the group buy?

For what values of the variable x is the expression square root of 7x+14+ square root of 7-x a real number?