Hello :
the consecutive room numbers are : n , n+1
n(n+1) =420
n²+n -420 = 0
the discriminant delta = b² - 4ac ( a = 1 and b = 1 and c = - 420
delta = (1)²-4(1)(-420) =1681= 41²
n = (-1 -41)/2 ( refused negatif number)
or
n = (-1+41)/2 =20
<span> the room numbers.are : 20 , 21</span>
Answer:
Step-by-step explanation:
Cost at the rate 6 for $15.24:
Cost of 
bottles
Cost of 
bottle
Cost of 
bottles
Cost at the rate 4 for $11.16:
Cost of 
bottles
Cost of bottle
Cost of bottles
Hence 
is less expensive.
Total saving
To find the ratio decimal form, write each ratio as it's corresponding fraction, then divide. Simplify fractions, if possible.
2:3= 2/3= 0.6666666= 0.67 rounded
3:7= 3/7= 0.42857= 0.43 rounded
3:6= 3/6= 1/2= 0.5
3:8= 3/8= 0.375
2:5= 2/5= 0.4
3:7= 3/7= 0.42857= 0.43 rounded
2:4= 2/4= 1/2= 0.5
Hope this helps! :)
50% so 9/18, or 1/2 simplified
Answer:
40%
Step-by-step explanation:
Original price: $25
Discounted price: $15
Amount of discount: $25 - $15 = $10
The boots sold for $10 less than the original price.
To find the percent discount, we need to find what percent of $25 is $10.
percent = part/whole * 100%
percent = 10/25 * 100%
percent = 0.4 * 100%
percent = 40%
