1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Lesechka [4]
3 years ago
5

Can someone confirm this? is it correct?

Mathematics
1 answer:
EastWind [94]3 years ago
8 0
<span>60 Sorry, but the value of 150 you entered is incorrect. So let's find the correct value. The first thing to do is determine how large the Jefferson High School parking lot was originally. You could do that by adding up the area of 3 regions. They would be a 75x300 ft rectangle, a 75x165 ft rectangle, and a 75x75 ft square. But I'm lazy and another way to calculate that area is take the area of the (300+75)x(165+75) ft square (the sum of the old parking lot plus the area covered by the school) and subtract 300x165 (the area of the school). So (300+75)x(165+75) - 300x165 = 375x240 - 300x165 = 90000 - 49500 = 40500 So the old parking lot covers 40500 square feet. Since we want to double the area, the area that we'll get from the expansion will also be 40500 square feet. So let's setup an equation for that: (375+x)(240+x)-90000 = 40500 The values of 375, 240, and 90000 were gotten from the length and width of the old area covered and one of the intermediate results we calculated when we figured out the area of the old parking lot. Let's expand the equation: (375+x)(240+x)-90000 = 40500 x^2 + 375x + 240x + 90000 - 90000 = 40500 x^2 + 615x = 40500 x^2 + 615x - 40500 = 0 Now we have a normal quadratic equation. Let's use the quadratic formula to find its roots. They are: -675 and 60. Obviously they didn't shrink the area by 675 feet in both dimensions, so we can toss that root out. And the value of 60 makes sense. So the old parking lot was expanded by 60 feet in both dimensions.</span>
You might be interested in
If three times a number is increased by 4, the result is -8. Determine the number.
Natali [406]

Answer:

Step-by-step explanation:

let the number is x

3x+4=-8

3x=-8-4

3x=-12

x=-4

3 0
3 years ago
Find the radius of a hemisphere with a volume of 106.1 cubic inches. Round to the nearest tenth if necessary.
True [87]

Answer:

Step-by-step explanation:

8 0
3 years ago
How do you find deviation and standard deviation
AveGali [126]

Answer: The standard deviation formula may look confusing, but it will make sense after we break it down. ...

Step 1: Find the mean.

Step 2: For each data point, find the square of its distance to the mean.

Step 3: Sum the values from Step 2.

Step 4: Divide by the number of data points.

Step 5: Take the square root.

Step-by-step explanation:

6 0
2 years ago
HELP ANSWER QUICKLY!!
Dvinal [7]

Answer:

B: 4x10 + 2x3

Step-by-step explanation:

6 0
3 years ago
Read 2 more answers
HELP ME PLEASE!!!
Kisachek [45]
Use photo math the app
6 0
2 years ago
Other questions:
  • You pack sandwiches for a mountain hike with your friends. Each sandwich takes 2 slices of bread, and each hiker eats one sandwi
    8·2 answers
  • Could somebody please answer these four questions with simple yet explanatory answers?
    14·2 answers
  • Find the surface area.
    13·1 answer
  • A box contains 5 plain pencils and 7 pens. A second box contains 4 color pencils and 4
    14·1 answer
  • If one side of a triangle is 70 degrees and the other side is 37 Degress what is the length of the third side
    7·2 answers
  • Please assist me with these problems using the 45-45-90 relationship triangles​
    5·1 answer
  • Which of the following is equal to the rational expression when x does not equal -2 or -6?
    9·1 answer
  • 3-*= x3 + x to the nearest tenth.
    9·1 answer
  • Small 20 caps $180.00
    13·1 answer
  • Solve for x. Round to the nearest tenth, if necessary.
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!