Can someone show me the work for this?

suppose y = sqrt (2x + 1) where x and y are functions of t.?

suppose y = sqrt (2x + 1) ,where x and y are functions of t.

(a) if dx/dt = 3, find dy/dt when x = 4.
dy / dt = ?

(b) if dy/dt = 5, find dx/dt when x = 12.
dx/dt= ?

Si la base de un triángulo isósceles mide 70 m y el ángulo opuesto a ésta mide 58°; entonces ¿cuánto mide la altura de dicho triángulo? a) 21.87 m. b) 40.01 m. c) 43.74 m. d) 63.14 m.

Which of the following represents the factorization of the trinomial below? x^2+7x-30

The ivring berlin learning center would like a possible net profit of $650,000 on its new resource manual it sells to schools. the fixed costs for producing the manual are $780,000 and the variable cost per package is $19.85. if the estimated unit sales are 1,250,000 units, what selling price unit should the ivring berlin learning center try?