25 % = 18
50% = 36
75 % = 54
100 % = 72
25% x 72 = 18 therefore n = 72
125% x 72 = 90
Therefore 125% of n is 90
Answer:
( - 7 + √17 ) / 2, ( - 7 - √17 ) / 2
Step-by-step explanation:
x^2 = - 7x - 8
x^2 + 7x + 8 = 0
Here,
a = 1
b = 7
c = 8
D = b^2 - 4ac
= 7^2 - 4 ( 1 ) ( 8 )
= 49 - 32
D = 17
x = - b ± √D / 2a
= - 7 ± √17 / 2 ( 1 )
x = ( - 7 + √17 ) / 2, ( - 7 - √17 ) / 2
Answer:
original number: 62
Step-by-step explanation:
number: xy
(x+y) + (10y+x) = 34
2x + 11y = 34 (1)
(10x+y) - (10y+x) = 36
9x - 9y = 36
x - y = 4
x = y + 4
2* (y+4) + 11y = 34 (substitute (1))
13y + 8 = 34
13y = 26
y = 2
x = 6
Number: 62
1/5 pound would be 20% of a pound or 0.2 pounds :)
11. 28*21 = 588 cubic feet
12. 16*9/3 = 48 pi ~150.72 ~ 151 cubic inches
13. 9*9*14/3 = 378 cubic yards
