Answer:
i
(or no solution if you haven't learned about imaginary numbers yet)
Step-by-step explanation:
The first thing you want to do is isolate x, or get x alone.
7x²+46=32
=> 7x²+46-46=32-46
=>7x²=-14
=>7x²÷7=-14÷7
=>x²=-2
If you have learned about imaginary numbers read on. If not, you have to realize that squaring any number can't result in a negative number. This means that there is no solution.
If you have learned about imaginary numbers, read on.
Now that you have x^2=-2, you can take the square root of both sides.
x=
Using a property about square roots (I don't know what it's called)
the equation becomes:
x=
And since 
=i, you can substitute in this value in to get x=i.
Answer:
z=
4z−11>1=
Step-by-step explanation:
Answer:
18
Step-by-step explanation:
1) 90 --- 100%
x --- 20%
x = 90*20/100 = 18
2)
20 % = 20/100 = 0.2
20 percent (0.2) of (*) 90 = 0.2*90 = 18
Answer:
Step-by-step explanation:
5
<h3>
Answer:</h3>
- $12,500 — dealer cost
- $20,875 — owner cost
- $5385.75 — owner's selling price
<h3>
Step-by-step explanation:</h3>
The problem statement is missing a lot of information, so we'll make some assumptions:
- the cost of manufacture is the dealer's cost
- the markup percentage uses the dealer's cost as a base
- the car is purchased for the marked price in each case.
1. The dealer's cost is the cost of manufacture: $12,500.
2. The marked-up price is
$12,500 + 0.67×12,500 = $20,875.
3. The book value after 8 years is
$20,875 - 0.57×20,875 = $8976.25
So, the Craigslist price is
0.60×$8976.25 = $5385.75
