Try this solution (note, this is not the shortest way):
1. if the given length is 'l' and the width is 'w', then according to the condition 4*l=w;
2. according to the condition the perimeter is 30 ft. Formula of the perimeter is P=2(l+w), then 2(l+w)=30;
3. if to substitute '4*l' instead of 'w', the formula of the perimeter (from item no. 2) will be as 2(4*l+l)=30 or 10*l=30 ⇒ l=3 ft. The length is 3 ft.!
4. if l=3 ft., then w=4*3=12 ft. The width is 12 ft.!
5. Area is
A=w*l; A=12*3=<u>36 ft²</u>
For part A Amy's estimate is inaccurate because when adding fractions they must have the same denominators. Amy probably made the mistake of adding 1/4 and 1/3 without changing the denominators first which gave her 1/7. If she were to do it correctly then she would've ended up with 7/12 as her answer.
My work:
1/4=3/12
1/3=4/12
4/12+3/12=7/12
I hope this helps and if I gave any false information I apologize in advance.
Minimum=25
first quartile= 30
Third quartile=45
Maximum=55
Well from what im gathering from your broken english and this ridiculously worded problem, here is how i see it.
15+2x=33
33-15=18, 18/2=9, 15+2(9)=33, 15+18=33, 33=33
x=9
Adults = x
Senior Citizens = y
x + y = 529......1
25x + 15y = 9745...2
Multiply (1) by 15
15x + 15y = 7935....3
25x + 15y = 9745....2
Subtract 3 from 2
10x = 1810
x = 181
Substitute x = 181 in
Eq (1)
x + y = 529
181 + y = 529
y = 529 - 181
y = 348
181 adults and 348 Senior Citizens
Hope this helps.
