When you begin watching a football game, the ball is on the 40-yard line. The team rushes for 20 yards loses 30 yards, then completes a 20 yard pass. Write an expression that represents the change in yards.
What yard line are they on now? How far do they have to go? Explain your thinking.

Some boys and girls were asked if they had a pet. one third of the group were boys. there were 20 boys. 20% of the girls had a pet. boys with a pet : girls with a pet = 1 : 5 i need to know how many girls there are.

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

Find the value of x in each case. give reasons to justify your solutions! d q ∈ pr