7. rubí por el dia de su cumpleaños recibe s/. 200 de
propina, gasta el 30 % en un polo y luego gasta el
50 % de lo que le queda en un pantalón, ¿cuánto
dinero aún le queda?
a) s/. 70
d) 20
b) 60
e) 120 c) 40
ayudame es para hoy día por favor

Find the volume of the described solid.the solid lies between planes perpendicular to the x-axis at x = 0 and x=7. the cross sectionsperpendicular to the x-axis between these planes are squares whose bases run from the parabolay=-31x to the parabola y = 30/x.a) 441b) 147c) 864d) 882

Answer asap evaluate 4-0.25g+0.5h4−0.25g+0.5h when g=10g=10 and h=5h=5.

White shapes and black shapes are used in a game. some of the shapes are circles. while the rest are squares. the ratio of the number of white shapes to the number of black shapes is 5: 11. the ratio of the number of white cicrles to the number of white squares is 3: 7. the ratio of the number of black circles to the number of black squres is 3: 8. work out what fraction of all the shapes are circles.