Answer:
10. x=3 and y=0
11. Infinitely many solutions.
12. No solutions.
13. x=3/2 and y=-12
14. Infinitely many solutions
15. x=0 and y=−2
Step-by-step explanation:
I just solved them by solving the top part first then the bottom part, I can not put in the actual steps because it takes up way to much space
First, find her rate for the day. Since she runs 10 laps a day, multiply.
400 times 10= 4000
Next, I'll convert kilometers into meters;
12 times 1000=12,000
Divide to find the days:
12,000/4,000=3
It will take 3 days to run a total of 12 kilometers.
<span>Answer:
The multiplication factor of increase should be inverse of the multiplication factor of decrease.
e.g. Say you have a number 100.
You increase it by 25%. The multiplication factor is 5/4 i.e. when you multiply 100 by 5/4, you get 100*5/4 = 125. This is 25% more than 100.
Now you want to decrease it by a certain % such that you get 100 back.
Basically, 100*5/4 * x = 100
So x = 4/5 (inverse of 5/4)
Hence, you decrease by 20% (the multiplication factor of 20% is 4/5)
or
Use this formula: cumulative % change = a + b + ab/100
You want the cumulative change to be 0.
a + b + ab/100 = 0
If you know that you are increasing by 25% and want to find the % by which you should decrease to get the same number,
25 + b + 25b/100 = 0
5b/4 = -25
b = -20
So you need to decrease (hence you get the -ve sign) by 20%.</span>
You know that the y is negative and the x is positive (it's the lower right side of a graph)
Answer:
Net increment = $108
Step-by-step explanation:
Current wage rate for Brian = $45 per day
number of days Brain is working = 24
Total earning in a month = $45 x 24 = $ 1080
Total increment = 10% of $45
= 0.10 x $45 = $4.5
New wage rate for Brain = $45=$4.5= $49.5
No. of working days = 24
New earning per month = $49.4 x 24 = $1188
Total increment in the earning = $1188- $ 1080
= $108
