To find the volume of a cube from its surface area, first use the formula for surface area to find the length of one side of your cube. To do this, plug the surface area you're given into the formula, which is surface area = 6x^2, where x is the length of one side of the cube. Then, solve for x.
Answer:
Step-by-step explanation:
Let X be the amount of money that Laurie has to spend.
Let Y be the amount of money that Laurie's sister has to spend.
Let C be the cost of a box of chocolates.
The following represents how much money Laurie and her sister have after buying the box of chocolates:
X + Y - C
This result is the amount of money that Laurie and her sister have left to buy on flowers.
Let F be the amount of money that Laurie and her sister spend on flowers.
We know that the above result must be greater than or equal to the amount that Laurie and her sister spend on flowers; otherwise they will be spending more than they have.
The following equation then represents how much Laurie and her sister have left to spend on flowers:
X + Y - C
F
Plugging in the values for the above letters will give you your answer.
Answer:
the solution of the system is:
x = 1 and y = 2.
Step-by-step explanation:
I suppose that we want to solve the equation:
-6*x + 6*y = 6
6*x + 3*y = 12
To solve this, we first need to isolate one of the variables in one of the equations.
Let's isolate y in the first equation:
6*y = 6 + 6*x
y = (6 + 6*x)/6
y = 6/6 + (6*x)/6
y = 1 + x
Now we can replace this in the other equation:
6*x + 3*(1 + x) = 12
6*x + 3 + 3*x = 12
9*x + 3 = 12
9*x = 12 - 3 = 9
x = 9/9 = 1
Now that we know that x = 1, we can replace this in the equation "y = 1 + x" to find the value of y.
y = 1 + (1) = 2
Then the solution of the system is:
x = 1 and y = 2.
Answer:
65
Step-by-step explanation:
150-(4^2+4)/2
150-(16+4)/2
150-(20)/2
130/2=65