There are 95 girls and 87 boys in year 13 at a school. one girl is going to be chosen for the role of head girl. a different girl is going to be chosen for the role of deputy head girl. one boy is going to be chosen for the role of head boy. a different boy is going to be chosen for the rule of deputy head boy. work out how many different ways this can be done.

Name the quadrilaterals that have four equal sides.

Give me the equations of two lines that have the same slope but are not parallel.

Ahypothesis is: a the average squared deviations about the mean of a distribution of values b) an empirically testable statement that is an unproven supposition developed in order to explain phenomena a statement that asserts the status quo; that is, any change from what has been c) thought to be true is due to random sampling order da statement that is the opposite of the null hypothesis e) the error made by rejecting the null hypothesis when it is true