En un examen tipo test de 30 preguntas se obtienen 0.75 puntos por cada respuesta correcta y se
restan 0.25 por cada error. Si un alumno ha sacado
10.5 puntos. ¿Cuántos aciertos y cuántos errores
ha cometido?

Asystem of equations has 1 solution. if 4x-y=5 is one of the equations , which could be the other equation ?

Suppose that the price p, in dollars, and the number of sales, x, of a certain item follow the equation 4 p plus 4 x plus 2 pxequals56. suppose also that p and x are both functions of time, measured in days. find the rate at which x is changing when xequals2, pequals6, and startfraction dp over dt endfraction equals1.5.

Acar loses a quarter of its value every year. it is originally worth $35,000. to the nearest dollar, how much will the car be worth in 8 years?