First 2 are true and others are false
P=2(l+w) = 9696
-> l+w= 9696/2= 4848
l=6+2w
6+2w+w=4848
6+3w=4848
3w=4842
w=1614
l=6+2w = 6+2x1614= 3234
Answer:
The percentage increase in Jayana's postcard collection is 15%
Step-by-step explanation:
Jayana had 20 postcards last year
With 3 more postcards this year
From the given equation Quantity = Percent x Whole
Here;
Let P = Percent/100%
Quantity = Increment in postcard = 3 postcards
Whole = The total postcards from last year = 20 postcards
Hence,
3 postcards = P x 20 postcards
P = 3/20 = 0.15
Recall P = Percent/100%
∴ Percent = P x 100% = 0.15 x 100% = 15%
The percentage increase in Jayana's postcard collection is 15%
The fourth one 12.5!
It's self-explanatory, hope this helps!