Answer:
18
Step-by-step explanation:
Sum of x, y and z = 20 × 3
= 60
x-5+y+4+z-5 = 60-5+4-5
= 54
Mean of x-5, y+4 and z-5
= 54 ÷ 3
= 18
300 mg/tablet
150 tabletsx(300mg/1 tablet)=150x300=45000 mg=45 grams
The ratio in simplest form would be 1:2:2.
Answer:
<h2>the c one</h2>
Step-by-step explanation:
<h2>hope it will help</h2>
To complete the square:
we take the coefficient ox "x" (which in this problem is -20)
we divide it by 2
square that number
then add it to both sides of the equation
-20 / 2 = -10
-10^2 = 100
then we add 100 to both sides of the equation:
x^2 -20x
x^2 -20x +100 = 100
******************************************************
To get the roots of the equation, we take the square root of both sides:
(x -10) * (x-10) = 10
(x-10) = square root (10)
x-10 =
<span>
<span>
<span>
3.1622776602
</span>
</span>
</span>
x1 =
<span>
<span>
<span>
13.1622776602
</span>
and don't forget that square root of 10 also equals </span></span><span><span><span> -3.1622776602
</span>
</span>
</span>
x2 = 10
-<span>
<span>
<span>
3.1622776602
x2 = </span></span></span>
<span>
<span>
<span>
6.8377223398
</span>
</span>
</span>
