10 pts
a computer randomly picks a number from the group 75, 76, 77, 78, 79.

what is the probability the number selected is larger than 78 or even?

enter your answer in the box as a decimal.

Express the following as a function of a single angle. cos(60) cos(-20) - sin(60) sin(-20)

For what values of the variable x is the expression square root of 7x+14+ square root of 7-x a real number?

Luke started a weight-loss program. the first week, he lost x pounds. the second week, he lost pounds less than times the pounds he lost the first week. the third week, he lost 1 pound more than of the pounds he lost the first week. liam started a weight-loss program when luke did. the first week, he lost 1 pound less than times the pounds luke lost the first week. the second week, he lost 4 pounds less than times the pounds luke lost the first week. the third week, he lost pound more than times the pounds luke lost the first week.