Prove the identity (a+b) (a-b) = a^2-b^2 For each step list the property or definition that justifies the step.

Jeff is playing cards with a friend all he needs to win is a 5 they each have 7 cards if his opponent doesn't have a 5 and Jeff has two fives whatbis the probability that the card Jeff draws is a 5

Enter the absolute value of the number as a mixed number in simplest form. -6 7/19

What is 1.9 simplified?

In problem 6.57, if the sample size was 20 with the same statistics, determine the confi - dence intervals on the mean of the weight of buttercups for the given confidence levels.

What is 858 divided by 6?

500 is how many tens

What is the solution to the following system of equations? y = - x2 - 5x - 4 y = - x2 + 9x - 18

A girl threw a marble 15 m vertically up in the air which later fell and settled at the bottom of a lake 7 m deep. Find the total distance travelled by the marble while falling down?

Joe sold 15 T-shirts for a total of $82.50. What is the unit price?

For the first 18 days of the month, buffet dinner generate $11,800 in sales. The buffet sale target for the month is $18,650. Given that there are 31 days in march, what daily sales goals must you set to meet your buffet sales target for the month