Ashirt originally cost $40.97, but it is on sale for $30.73. what is the percentage decrease of the price of the shirt? if necessary, round to the nearest percent.

25 percent

Step-by-step explanation:

The percent decrease is found by

percent decrease = (original - new)/original * 100 percent

                               = (40.97- 30.73)/ 40.97 * 100 percent

                               =10.27/40.97 * 100 percent

                               =.24993898 * 100 percent

                                = 24.993898 percent

                                 = 25 percent

the polynomial is a perfect square trinomial of the form a^2-2ab+b^2:

option a. true

step-by-step explanation:

9x^2-12x+4

comparing with the form a^2-2ab+b^2

1.) a^2=9x^2

solving for a: square root both sides of the equation:

sqrt(a^2)=sqrt(9x^2)

a=sqrt(9) sqrt(x^2)

a=3x

2.) b^2=4

solving for b: square root both sides of the equation:

sqrt(b^2)=sqrt(4)

b=2

to be a perfet square trinomial 2ab must be equal to 12x. let's check:

2ab = 2 (3x) (2)

2ab = 12x

correct

45.36 feet per second

step-by-step explanation:

tyrone travels 30 miles in 58.2 minutes.  

1 mile = 5280 feet; this means he travels

30(5280) = 158400 feet in 58.2 minutes.

1 minute = 60 seconds; this means he travels 158400 feet in

58.2(60) = 3492 seconds.

this gives us the unit rate of

158400/3492 = 45.36 feet per second.