Answer:
5) the answer is 2 hours
Step-by-step explanation:
1 hour: 35% is destroyed
35% added 2 times (2 hours) equals 70%
Answer:
-13, -3
15, 2.6
Step-by-step explanation:
x, y are the numbers
x = 5y + 2
x×y = 39
(5y + 2)×y = 39
5y² + 2y - 39 = 0
the solution of a quadratic equation :
y = (-b ± sqrt(b² - 4ac))/2a
a = 5
b = 2
c = -39
y = (-2 ± sqrt(2² - 4×5×-39))/2×5 =
= (-2 ± sqrt(4 + 780))/10 =
= (-2 ± sqrt(784))/10 = (-2 ± 28)/10
y1 = (-2 + 28)/10 = 26/10 = 2.6
y2 = (-2 - 28)/10 = -30/10 = -3
x1 = 5×2.6 + 2 = 13 + 2 = 15
x2 = 5×-3 + 2 = -15 + 2 = -13
Answer:
67667.7
Step-by-step explanation:
let the number= Y
the question simply means that 0.15 percent of Y which give 10.5
so, let find Y:
0.15% of Y 10.15
<h3>Stating the mathematical equation</h3>
0.15/100×y = 10.15
0.0015y= 10.15
divide bothsides by 0.0015
0.0015y/0.0015= 10.15/0.0015
y=6766.66
y= 6766.7 approximately
<h3>therefore, 0.15% of 6766.7 is 10.5</h3>
Answer:
2.406%
Step-by-step explanation:
28600*18%=5148
$5148-28600=$23,452
$23452/12 months=$1954.33 a month take home
1954.33/812=2.406%
