Answer:
If 2m is the radius, the diameter is 4 meters.
2*2=4
Volume is 18 in cubed
3x2.25x8 and divide that by 3 gives u 18
To find the unit price of each item you want to divide:
Fresh water:
$1.76 / 16 = $0.11
Spring water:
$2.40 / 20 = $0.12
So the statement that is true is B) Fresh water has a lower unit price of $0.11/ounce.
Hope this Helps!!
Answer:
11
Step-by-step explanation:
The two equations appear to be ...
- 12x +4y = 152
- 32x +12y = 420
These can be solved for y using Cramer's rule:
y = (152(32) -420(12))/(4(32) -12(12)) = -176/-16 = 11
The cost of the vegetarian lunch is 11.
_____
<em>Comment on Cramer's Rule</em>
For equations ...
ax +by =c
dx +ey = f
The solutions are ...
x = (bf -ey)/(bd -ea)
y = (cd -fa)/(bd -ea) . . . . note the denominators are the same expression
Once you memorize the pattern of products, this can be the simplest way to solve a pair of equations--especially if you only need one of the variable values.
Quadratic formula is x=(-b+-sqrt(b^2-4ac))/(2a)
a= 1, b=-4, and c=3
Therefore, x=(-(-4)+-sqrt((-4)^2-4(1)(3))/(2(1))
Solve for both the plus and minus equations; the answers will be the roots to the quadratic equation.
