how many unique arrangments can you make using the letters HALLOWEEN if the E's must be apart ?

Which of the following is required in order to draw a box & whisker plot? mean 

number of data elements 

frequency 

median 

Jenna estimates that she has an 85% chance of finishing her Math homework and a 70% chance of finishing her science homework. What is the probability that she won't finish either homework?

what is the aroc of  $f\left(X\right)=x^2-4x+7$ƒ (X)=x²−4x+7 on the interval 1 $\le$≤  $x$x  $\le$≤ 3

In the game backgammon, when you roll doubles with two dice you can double the total on the dice. what is the probability of rolling doubles

a bag has 3 red tiles, 1 yellow tile and 2 green tiles 

b) how does the value change if the first tile is not replaced? 

A child has some LEGO bricks to play with . They have 19 identically shaped bricks in these colours.  4red 6 yellow 5 white 3 blue 1green , how many different combinations of bricks can they choose to build something with if they have to use at least 1 brick

The teacher in your classroom surveys her 30 students in an attempt to help them understand Venn Diagrams in the most complex form, when there are 3 counting options. She asks all the people wearing red shirts to stand up, 8 people stand. She asks them to sit down. Then she asks all those wearing blue pants to stand, 24 stand up. She asks them to sit. Then she asks all the people wearing black shoes to stand, and 10 stand up. She asks them to sit. While asking these questions, she notices 3 people have stood up for all questions, 4 are wearing both red shirts and blue pants, 7 are wearing both blue pants and black shoes and finally, 5 are wearing both red shirts and black shoes. Draw a 3 circle VENN diagram, label what each area represents and CALCULATE numbers for each area (show all your calculations using proper mathematical and statistical form for full marks).

A home computer costs $9/year in electricity costs. If a new computer costs $2000 to purchase and lasts for 5 years find the total annual cost for this computer

Factor x^{3 +} 2x² - 5x - 6 fully.