Answer:
1. Dave has 23 ($10 coins) and 18 ($20) coins.
2. Dave has 18 ($10 coins) and 16 ($20) coins.
Explanation:
1.
Let x be the number of $10 coins.
Then, the number of $20 coins will be 41-x.
The equation for the sum of money can be written as:
590 = 10x + 20 * (41-x)
590 = 10x + 820 - 20x
590 - 820 = -10x
-230 / -10 = x
x = 23
This means that Dave has 23 $10 coins and (41-23 = 18) 18 $20 coins that sum up to a face value of $590.
2.
Using the same priciple,
let x be the number of $10 coins
let 34-x be the number of $20 coins
Sum of money equation:
500 = 10x + 20 * (34-x)
500 = 10x + 680 - 20x
500 - 680 = -10x
-180 / -10 = x
x = 18
So, Dave has 18 $10 coins and (34-18 = 16) 16 $20 coins that add up to a face value of $500.
Answer:
$50
Explanation:
Jim buys a 5% bond
The amount is $100
The market interest rate increases to 10%
Therefore the price at which the bond cann be sold is calculated as follows
= 5×100
= 500×0.01
= 50
Hence it can be sold for $50
I believe you have to search a URL of a website on the wayback machine search bar.
Then, you can browse the past-present years of how that website used to look like.
Hope this helps.
If for every $10 increase sales drop by 3 units when you increase to $300 you will lose 30 units.
($10)(10) = 100
(10)(3) = 30
60 units - 30 units = 30 units.
($300)(30) = $9,000 is your weekly revenue at a price of $300 per unit.
