+ 15 because you solve negative inside but when you get it out it becomes positive
Okay the points given are -4,-5 and -2, 1
we know the formula
y2 - y1/x2 - x1
label -4 as x1 and -5 x2
-2 as y1 and 1 as y2
1 - -2 turns into 3
-5 - -4 turns into -1
sp its - 3/ 1
There are 2 ways to do this...
19,500(1.06) = 20,670
or
19,500 + 0.06(19,500) = 19,500 + 1170 = 20670
4/5 as a decimal would be 0.8. This is because 5 x 20 = 100, so then if you multiply 5 by 20, then you need to do the same for 4. 4 x 20 = 80. the new fraction is 80/100. Then, that simplifies to 8/10, which is equivalent to eight tenths, which is written as 0.8.