Aclerk was asked to change a $10 bill. she returned nine more dimes than nickels, and twenty one more quarters than dimes. how many coins of each did she return

Let x = number of nickels

x + 9 = dimes               (nine more dimes than nickels

x + 9 + 21 = quarters   (21 more qtrs than dimes

.05(x) + .1(x+9) + .25(x + 9 + 21)  = 10

.4x + 8.4 = 10

.4x = 1.6

x = 4     - nickels

x+ 9 = 13    - dimes

x + 30 = 34   - quarters

Hope this helps

b. 2

step-by-step explanation:

the slope of a line =δy/δx

δy= y₂-y₁

δx= x₂-x₁

therefore, using the points (-2,-3)   and (3,7) we can calculate gradient as follows:

m=(7--3)/(3--2) (a number minus a negative number the sign changes to a plus)

m=(7+10)/(3+2)

=10/5

=2

answer: the correct one is a

step-by-step explanation: