2. Write the sum using summation notation, assuming the suggested pattern continues. -9 - 4 + 1 + 6 + ... + 66

Step-by-step explanation:

a=-9

d=-4-(-9)=-4+9=5

l=66

l=a+(n-1)d

66=-9+(n-1)5

66+9=(n-1)5

n-1=75/5=15

n=15+1=16

Sn=n/2 {-18+(n-1)5}

=n/2{5n-23}

so reqd. sum is ∑[n/2{5n-23}] where n from 1→16

javeir earned 56 dollors more than kyle so kyle and javier had 14w but javier made 56 dollors more so 14w plus 56 equals 70w so kyle has 14w

step-by-step explanation: hope i plz give me brainliest with the points so this is not constant cause it says last week so its clearly not every week