_como hallar la razon de una progresion aritmetica que de 3 a 12
_ calcular el noveno termino de la progresion geometrica 3;12;48...
_El septimo termino de una progresion geometrica es 1458 y la razon es 3 calcular el primer termino
_El primer termino de una progresion geometrica es 2 y el ultimo termino es 1/32 si la razon es 1/2 calcular el numero de terminos
PORFAVOR es para hoy ayudenme :c

/is used for a fraction 1) if x = 2/3 and y = 3/4, what is the value of (x + y) (x/y) expressed as a common fraction? 2) what is the least positive integer greater than 1 that leaves a remainder of 1 when divided by each of 2, 3, 4, 5, 6, 7, 8, and 9? 3) the ponde family's powerjet pumps 420 gallons of water per hour. at this rate, how many gallons of water will it pump in 45 minutes? 4) kim's insurance company pays 80% of the cost of all prescription medication she purchases in a year beyond the first $250 worth of prescriptions. her prescriptions for this year cost a total of $570. how many dollars of this amounts will kim's insurance company pay?

Satchi found a used bookstore that sells pre-owned dvds and cds. dvds cost $9 each, and cds cost $7 each. satchi can spend no more than $45.

Afamily has five members. a mom, a dad, two sisters, & a brother. the family lines up single file. what is the probabillity that the mom is at the front of the line