A rectangular parking lot has a perimeter of 820 ft. The area of the parking lot measures 42,000 ft2. What is the width of the parking lot?
Answers
A rectangle, let length=a and width=b
perimeter: a+a+b+b=820
2a+2b=820 --> a+b = 410
Make a or b the subject: a=410-b
Area: ab=42 000 (area of a rectangle, length x width)
Sub a in.
b(410-b) = 42000
Expand: 410b - b^2 = 42000
Rearrange and use quadratic formula: b^2 -410b + 42000=0
b= 210 (can only be positive because length cannot be negative)
Sub this value back into perimeter or area equation: a + 210 = 410 --> a =200
Therefore, a= 200 and b=210.
Depending what you made the width is, it should be 200ft.
(I may have made some calculation errors as i'm not used to typing it out, but the process should be correct) I hope helps! :)
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Evaluate the expressions 3x-2 and 4x+4 for the following value of x.
What is the decimal form for nine and fifteen thousandths?
I need help fast will give brainiest!!!!
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45 is BA so 50 is BC
Answers
Answer:
False
True
Step-by-step explanation:
Hope this helps
False
There ya go
What is Keith's unit rate of change of dollars with respect to time; that is, how much does Keith save in one year?
Answers
Answer:
Keith's unit rate of change of dollars with respect to time is $1500.
Step-by-step explanation:
It is given that Keith is saving money for a car.
Year 1: 1500
year 2: 3000
year 3: 4500
Let y be the saved amount after x year.
The coordinate pairs according to the given table are (1,1500), (2,3000) and (3,4500).
The formula for rate of change is
Consider any two coordinate pairs.
Let as consider (1,1500) and (2,3000). So, Keith's unit rate of change of dollars with respect to time is
Therefore, Keith's unit rate of change of dollars with respect to time is $1500.
OA. natural
OB.
rational
OC. negative
OD. whole
Answers
Answer:
the answer is b. rational
Answers
To find the median first put the numbers in order from least to greatest.
3, 6, 7, 7, 25
Now cut one number from both sides
6, 7, 7
Once again.
7
So 7 is the Median
Answers
The solution to the given inequality is b > 47/15
How to find the solution of the inequality expression
Given the compound inequality expressed as;
2 3/5< b-8/15
Add 8/15 to both sides of the equation
2 3/5 + 8/15 < b-8/15 + 8/15
Yhe fraction at the right side cancels out to have;
2 3/5 + 8/15 < b
Swap the sides
b > 13/5 + 8/15
Find the LCM
b > 39+8/15
b > 47/15
Hence the solution to the given inequality is b > 47/15
Learn more on compound inequality here:brainly.com/question/24372553
Answer:
D. b > 3 2/15
Step-by-step explanation:
I took the test