Assuming the movie screen is rectangular, the answer would be 8 meters tall. Because the perimeter is 2 times width plus 2 times height, you can subtract 36 (18 times 2) from 54. This leaves you with 18, which is 2 times height. Divide both by two and you get 9
If you draw the line and mark -2 and 3 you find that they are 5 apart. By calculation, subtract the lowest from the highest: 3 - -2 = 3+2 = 5
I hope this helps you
length 2w+3
width w
Perimeter=2 (width+length)
30=2 (w+2w+3)
15=3w+3
3w=12
w=4
2w+3=2.4+3=11
Regrouping is only done into lower place values. For example, tens to ones and hundreds to tens.
Use pythagora's theorem to solve it
c^2=a^2+b^2
x^2=(3/4)^2+1^2
x^2=25/16
x= 5/4 = 1 1/4 inch
therefore it is B
