X²-x-12=0
describe the number and types of roots using the discriminant
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2 real roots

Step-by-step explanation:

The discriminant is b^2 -4ac  where ax^2 +bx -c

If b^2 -4ac > 0 we have 2 real roots

b^2 -4ac = 0 we have 1 real root

b^2 -4ac < 0 we have 2 complex roots

x²-x-12=0

a =1 b=-1  c = -12

(-1)^2 - 4(1)*(-12)

1 +48

49 > 0

2 real roots

Find out the what is the total cost of the leash .

To prove

As given

Kirk finds a dog leash with a price tag of $24 at a pet store.

The leash is 10% off the original price.

He must also pay 6% sales tax.

10 % is written in the decimal form.

= 0.1

6% is written in the decimal form.

= 0.06

Than the discount on the original price = 0.1 × 24

                                                                = $2.4

Than the sales price = 0.06 × 24

                                 = $1.44

Total cost of the leash = 24 - 2.4 + 1.44

                                   = $23.04

Therefore  total cost of the leash is $23.04 .

Step-by-step explanation: