Answer:
3 oz
Step-by-step explanation:
Let x represent the number of oz. of the medal with 40% gold:
Set up an equation and solve for x:
0.4x + 7(0.9) = 0.75(x + 7)
0.4x + 6.3 = 0.75x + 5.25
6.3 = 0.35x + 5.25
1.05 = 0.35x
3 = x
So, you will need 3 oz. of the metal with 40% gold
X * 1.085 = 19.18
solve for x
Why is this how you figure it out? well... you have the price of the CD cover and the total is the price of the CD cover with tax.
Price of the CD cover would be: x * 1 = price of cd cover
Put that tax on there: x * 1.085 = price of cd cover with tax
why .085? move that decimal over two places to the left from the 8.5%
Answer:
7
Step-by-step explanation:
(a^3 - b^3) / 5
Let a=2 and b = -3
Do the exponents inside the parentheses
(2^3 - (-3)^3) / 5
Then add
(8 - (-27))/5
Subtracting a negative is like adding
(8+27)/5
( 35)/5
7
Answer:
The answer is <u><em>-0.44</em></u>.
Hope that helps. x
