Which equation has the same solution as 2x^2+16x-10=0

a: (x+4)^2=-3
b: (x+4)^2=-11
c: (x+4)^2=13
d: (x+4)^2=21

Which expression is equivalent to7_/x^2 ÷ 5_/y^3? assume y# 0

Julie buys 2kg of apples and 7kg of pears ? 12.70. the pears cost ? 1.30 per kilogram what is the price per kilogram of the apples? show your working out

Aclassroom is made up of 11 boys and 14 girls. the teacher has four main classroom responsibilities that she wants to hand out to four different students (one for each of the four students). if the teacher chooses 4 of the students at random, then what is the probability that the four students chosen to complete the responsibilities will be all boys?