Hector spent $25.75 for 2 dvds that cost the same amount. the sales tax on his purchase was $3.15. hector also used a coupon for $1.00 off his purchase. how much did each dvd cost?

The cost of each DVD is $11.8 .

Step-by-step explanation:

Let us assume that the cost of one DVD be x.

As given

Hector spent $25.75 for 2 DVDs that cost the same amount.

The sales tax on his purchase was $3.15.

Hector also used a coupon for $1.00 off his purchase.

Than the equation

Total Hector Spents for two DVDs = 2 × cost of one DVD + Sales tax + Coupon cost .

Putting the value

25.75 = 2x + 3.15 - 1.00

25.75 = 2x +2.15

25.75 - 2.15 = 2x

23.6 = 2x

x = $11.8

Therefore the cost of each DVD is $11.8 .

(- 1, 0 )

step-by-step explanation:

an x- intercept is where the function crosses the x- axis.

to find the x- intercept/s look for the value of x when f(x) = 0

from the given table there are 3 values of x where f(x) = 0

when x = - 1, x = 2, x = 3

the one that is listed is (- 1, 0 )

not only in mathematics, scientific proof also are required in the other field of science. also maths proofs are of particular structure, containing steps and logics. so proving is like doing science, it is science. that's why it is important to prove. 

an inaccurate proof leads to errors, or stating results that are not accurate.  which wil mess the probelm up you dont want this