Here's what I've done:
Represent the set of 5 items by {a,b,c,d,e}. Assume that these items have already been arranged in ascending order.
The middle item, c, has the value 12.
Since "mode" means "most frequently appearing item," let's assume that d and e are both 15.
If the range is 9, we could then write 15-9 = 6, meaning that a = 6.
Then we have {6,b,12,15,15}
To find b, sum up {6,b,12,15,15}, equate the result to 11, and solve for b.
Assuming his house payment is $468.21
you just add them all together
468.21+1231+1087= $2786.21
then rounded to the nearest dollar
$2786
180 degrees in a triangle therefore you will subtract 54 and 79 from 180 which then gives you the answer --47--
do you understand how to do it now ?
You are seriously all it take is cross multiplying
