Hi again!
2x - y = 80
5y = x
P.S. Are you struggling with Algebra, equations and inequations....my advice to you is to start using Khan Academy. It will help you a lot!
Ok stop talking and let's get to work!
We need to solve 2x - y = 80 for y
2x - y = 80
-y = 80 - 2x
Multiply both sides by -1 because y cannot be negative
-y * -1 = -1(80 - 2x)
y = 2x - 80
Now we can substitute 2x - 80 for y in 5y = x
5y = x
5(2x - 80) = x
Use the distributive property
(5)(2x) + (5)(-80) = x
10x - 400 = x
Add -x on both sides
10x - 400 - x = x - x
9x - 400 = 0
Add 400 on both sides
9x - 400 + 400 = 0 + 400
9x = 400
Divide both sides by 9
9x/9 = 400/9
x = 400/9
To find y, we can substitute 400/9 for x in y = 2x - 80
y = 2x - 80
y = 2(400/9) - 80
y = 800/9 - 80
y = 800/9 - 80/1
y = 800/9 + -720/9
y = (800 - 720)/9
y = 80/9
Thus,
The answers are: y = 80/9 and x = 400/9
As always, it is my pleasure to help students like you
Answer:
Approximately to the nearest cent :
$1856
Step-by-step explanation:
We are told in the above question that:
Suzie's profit increases every month by 30%
We are told that in the first month her profit is $300
Step 1
We are to find the profit for the other weeks:
First week Profit = $300
b) Second week =
$300 × 30/100 = $90
Total amount for the second week= $90 + $300
= $390
c) Third week
$390 × 30/100 = $117
Total amount for the third week = $117 + $390
= $507
d) Fourth week
$507 × 30/100 = $152.1
Total amount for the fourth week = $152.1 + $507
= $659.1
Total Amount of money she would make after 4 weeks =
Profit of the first week + Total Amount for the first week + Total Amount for the second week + Total Amount for the third week + Total Amount for the fourth week
= $300 + $390 + $507 + $659.1
= $1856.10
Approximately to the nearest cent the amount of money will she make in all over 4 weeks is :
$1856
To solve this, we are going to use the compound interest formula:
where
is the final amount after
years
is the initial investment
is the interest rate in decimal form
is the number of times the interest is compounded per year
For the first 4 years we know that:
,
,
, and since the problem is not specifying how often the interest is communed, we are going to assume it is compounded annually; therefore,
. Lest replace those values in our formula:
Now, for the next 6 years the intial investment will be the final amount from our previous step, so
. We also know that:
,
, and
. Lets replace those values in our formula one more time:
We can conclude that Collin will have <span>£3691.41 in his account after 10 years.</span>
Answer:
орборболблооблоблоол
Step-by-step explanation:
Answer:
Whats the question?
Step-by-step explanation:
