Joe’s cell phone costs him $21 per month plus $3 for every 1gb of data downloaded. what is the limit to the number of gbs he can download to stay within his monthly budget of $30.

He must use  3 GB or less

Step-by-step explanation:

Total cost = flat fee + number of GB * charge per GB

We  know he must stay under 30 dollars so change the equals to less than or equal to (the opening facing the 30) and replace the total cost with 30

30≥ flat fee + number of GB * charge per GB

We know the flat fee is 21 and the charge per GB is 3

30≥ 21 + number of GB * 3

Subtract 21 from each side

30-21 ≥ 21-21 + number of GB * 3

9≥number of GB * 3

Divide by 3

9/3 ≥ number of GB * 3/3

3≥  number of GB

He must use  3 GB or less

720

step-by-step explanation:

first i did work 2nd i did work and 3rd i did work

given that triangle abc is transformed two times to get triangle

a"b"c"

first abc is transformed in to a'b'c' as follows:

the coordinates of a are (1,-1) and transformed into a'(-1,1)

similarly b (4,-2) became b'(-4,2) and

c(7,-2) became c'(-7,2)

i.e. (x,y) becomes (-x,-y)

this is nothing but reflection about a point here origin.

thus first transformation is reflection on the origin.

next is exactly shifting 3 units down

source: