Max needs to paint a wall surrounding a door. The dimer
shown below.
Founding a door. The dimensions on his blueprint are
pue 21
25 ft
5 ft
20 ft
20 ft
12 ft
12 ft
10 ft
10 ft
Which expression can he use to find the area of the wall? Select all that apply.
A (20 x 25) - (5 X 12)
B 10 X 12 + 10 X 12 + 8 X 25
Ć 10 x 20 + 10 x 20 + 5 X 8
D (20 X 15) + (20 x 10)

answer:

328 sq. ft. of walls that need to be painted.

Step-by-step explanation:

Measure the total distance (perimeter) around the room. (10 ft. + 15 ft.) x 2 = 50 ft.

Multiply the perimeter by the ceiling height to get the total wall area: 50 ft. x 8 ft. = 400 sq. ft.

Doors are usually 21 square feet (there are two in this example): 21 sq. ft. x 2 = 42 sq. ft.

Windows average 15 square feet (there are two in this example): 15 sq. ft. x 2 = 30 sq. ft.

Take the total wall area and subtract the area for the doors and windows to get the wall surface to be painted: 400 sq. ft. (wall area) – 42 sq. ft. (doors) – 30 sq. ft. (windows) = 328 sq. ft. of walls that need to be painted.

24/56=hx^7

step-by-step explanation:

step-by-step explanation: so we look at the formula un = a + (n-1)d

un is the amount of seats

n is the nth term aka row number

a is the original sequence/row number

d is the difference between each term

so in this a=22 d=6 and n can remain as n because we are simply formjng a rule

lets put these in the equation

un=22+(n-1)(6)

this is your answer to part a

however

lets double check that this is correct, we'll try putting it into the second term

un=a+(n-1)d

u2=22+(2-1)(6)

u2=22+6

u2=28

as the question said the second row has 28 seats so now we know the formula we made is correct.

as for part b

un=a+(n-1)

its asking us to find a row with 100 seats.

remember un was the amount of seata so all we do is substitute this in.

un=100 a=22 d=6

un=a+(n-1)d

100=22+(n-1)(6)

so now we simplify to find n which is the row number.

100-22=22+(n-1)(6)-22

78=(n-1)(6)

78/6=(n-1)(6)/6

13=n-1

13+1=n-1+1

14=n

so now we know that in the 14th row there is 100 seats.

hope this and that you understood! its my first time using the app or anyone out on here : p its also me to revise so a bunch! ask more questions if you dont understand ☺