Mathematics High School

Brianna's parents built a swimming pool in the backyard. Brianna says that the distance around the pool is 120 feet.
40 Ft
2011
1. Is she correct? Explain why or why not. (Your explanation needs to include the following: If she is correct, show what she
did to find the distance around the pool. If she is not correct, find the correct distance, showing all work.)
2. Explain (using words this time) how Brianna would determine the distance around the pool so that her parents would
know how many feet of stone to buy for the edging around the pool.

Answers

Answer 1
No, Brianna is not correct.
The distance around the pool is 131.4 ft

Step by step explanation:

1) Semi circle with a diameter equal to the side opposite it, 20 ft.
Find the length of half the circle:
Circumference of semi-circle = (1/2)(πd)
Where:
π = 3.14
d = 20 ft.
Circumference of semi-circle = (1/2)(3.14)(20 ft) = 31.4 ft.
2) Vertical lengths from the endpoint of semi-circle to the endpoints of horizontal lengths, 40 ft each ⇒ 2 × 40 ft. = 80 ft.
3.) Horizontal length at 20 ft.
Add the semi-circle, vertical, and horizontal lengths:
Distance around the pool = 31.4 ft + 80 ft. + 20 ft.
Distance around the pool = 131.4 ft.
Answer 2

No, Brianna is not correct.

The distance around the pool is 131.4 ft

What is perimeter of semicircle?

The perimeter of a semicircle is the sum of half of the circumference of the circle and its diameter. As the perimeter of a circle is 2πr or πd. So, the perimeter of a semicircle is 1/2 (πd) + d or πr + 2r, where r is the radius, and, 2r=d is diameter.

P=(πr + 2r)

here, we have,

1) Semi circle with a diameter equal to the side opposite it, 20 ft.

Find the length of half the circle:

Circumference of semi-circle = (1/2)(πd)

Where:

π = 3.14

d = 20 ft.

Circumference of semi-circle = (1/2)(3.14)(20 ft) = 31.4 ft.

2) Vertical lengths from the endpoint of semi-circle to the endpoints of horizontal lengths, 40 ft each ⇒ 2 × 40 ft. = 80 ft.

3.) Horizontal length at 20 ft.

Add the semi-circle, vertical, and horizontal lengths:

Distance around the pool = 31.4 ft + 80 ft. + 20 ft.

Distance around the pool = 131.4 ft.

To learn more on perimeter of semi-circle click:

brainly.com/question/29140521

#SPJ2

Related Questions


Enter the value of x.

Answers

10 is the answer because using the Pythagorean theorem 6^2 + 8^2 = 100. The square root of 100 would be 10
8^2+6^2= x^2

64+36=100

Once you get X^2 you have to square root it. The square root of 100 is 10.

X=10

Help plz it’s urgent

Answers

Answer:

3. 18 + 18 + 7 + 7 = 50

4. 120 degrees

Step-by-step explanation:

Find x of the angles are supplementary 3x-2 and 41 degrees ?

Answers

Answer:

x = 47

Step-by-step explanation:

3x - 2 + 41 = 180 {Supplementary}

3x   + 39 =  180

        3x   = 180 - 39

       3x  = 141

          x = 141/3

x = 47

What is the value of the following expression if x = 4, 2x + 3.1

Answers

Answer:

11.1

Step-by-step explanation:

x=4

2x+3.1

You need to plug in the 4 into the x in the equation above

2(4)+3.1

8+3.1=11.1

Answer:

11.1

Step-by-step explanation:

here's your solution

=> the value of x = 4

=> the given expression is = (2x + 3.1)

=> putting the value of x in expression

=> 2*4 + 3.1

=> 8 + 3.1

=> 11.1

hope it helps

find the area plz and thank u have explanation

Answers

Step-by-step explanation:

a pentagon is 5 equilaterial triangles meaning you would use the formula of area of a triangle and multiply that by 5.

422.5m^2 is the answer

HELP!!!! anyone know any of these answers for the “Homework: February Spiral Review” 20 questions!!!!

Answers

Answer:

Linear equation

Step-by-step explanation:

The rate of change for y with respect to x remains constant for the linear equation.

The rate of change is 3

Answer:

nonliner

Step-by-step explanation:

it changes.

the input is right but the output isn't

if <1 and <2 are vertical angels and m<1 = 180, find <2

Answers

Answer: i would say 280.

Step-by-step explanation: because if you add 180 plus another set of it it would make 280

Answer:

180

Step-by-step explanation:

Since they are vertical angles, they are congruent to each other

m<1 = m<2

what is the sum of the measures of the angles of a convex quadrilateral? will this property hold if the quadrilateral is not convex?​

Answers

Answer:

The sum of the measures of the angles of a convex quadrilateral is 360° as a convex quadrilateral is made of two triangles. Yes, this property also holds true for a quadrilateral which is not convex. This is because any quadrilateral can be divided into two triangles.

Maria has 64 flowers. She makes 8 bouquets with the flowers. How many bouquets of flowers will she have if she has 80 flowers?​

Answers

Answer:

10 bouquet of flowers

Step-by-step explanation:

64÷8=8

80÷8=10

How do I solve this?
I have the answer but what is the step-by-step explanation.

Answers

-7 = 1 + 2/3n

Subtract 1 from both sides:

-8 = 2/3n

Multiply both sides by 3:

-24 = 2n

Divide both sides by 2:

N= -12

Answer:

n=-12

Step-by-step explanation:

Okay this isn't to hard first in the equation you must subtract 1 from both sides

So this: -7=1+2/3n

Becomes This: -8=2/3n

Then I divided by 2 on both sides to get:-4=1/3n

Then I multiplied by three to get -12=n

Let me know if you're still confused

EASY EXTRA POINTS HELP ASAP WILL MARK BRAINLIEST

Answers

Answer:

it should be two

Step-by-step explanation:

I hope this helps!

It should be 1. Have a good day.

Carlos walked 10 miles at an angle of 20° north of due east. To the nearest hundredth of a mile, how Far East, X, is Carlos from his starting point?

Answers

Here is the answer:

Hope this helps !! :D

Nenenenebnebenebenennenenenene

y=6x-14 & y=-2x+34 solved in the substitution method

Answers

Answer:

x = 6.125

Step-by-step explanation:

y  = -2 + 34

so

-2x + 34 = 6x - 15

+2x           +2x      

34 = 8x - 15

+15        +15

49 = 8x

x = 6.125

plz mark as brianliest if correct!!!

PLEASE HELP QUICK!! ILL GIVE THE BRAINLIEST!!

Ms. Williamson is looking at data to determine (figure out) how long to make her slide shows for class. It takes her about 7 minutes per example problem when she is teaching in front of the class. Write an equation to compare the number of example problems and total minutes of teaching.

Answers

Answer:y=7x+y

Step-by-step explanation:

Jerry solved the equation 2x-4=20 by adding four 1-tiles to each side. Explain why Jerry's method works.

Answers

Answer:

Kindly check explanation

Step-by-step explanation:

Given the equation : 2x-4=20

By adding 4 1 - tiles to each side, this will eleminate the constant term on the left hand side where the Coefficient we wish to solve for lies. Hence, the same exact treatment given to data on the right hand side is done to the data in the left. Hence, the method will work as it will give ;

2x - 4 = 20

2x - 4 + 4 = 20 + 4

2x = 24 ( constant eliminated)

x = 24/4

x = 6

For what equations below is x = -3 a possible equation select three options

Answers

Show us the options

Answer:

x3-6x-9=0

Step-by-step explanation:

x=-3

-27+18-9=0

0=0

2. The difference between a number and three is no more than two.

Answers

Answer:

x-2≤2

Step-by-step explanation:

URGENT !!!!! Please answer correctly !!!!!!!!! Will be marking Brianliest !!!!!!!

Answers

Answer:

142.5 in^2

Step-by-step explanation:

First, find the area of the rectangle

19*10= 190

Now find the area of the triangle

A=1/2bh

A=1/2(19)(10-5)

A=47.5

Since we need the shaded region, subtract the triangle area from the rectangle area

190-47.5=142.5

Select the correct answer. Gas station A has posted a chart that shows the price of gasoline in terms of the number of gallons. Gallons Price 3 9.15 5 15.25 7 21.35

Answers

3.05 per gallon for gas station a

I’m pretty sure the answer is 3.05 per gallon

Please help me i really need it please

Answers

Answer:

1. 12 outcomes 2. 24 outcomes

Step-by-step explanation:

Van sold his skateboard for $54. He saves %15 of the money to purchase a new skateboard. How much does Van save for the new skateboard?

Answers

He saves $8.10 for his new skateboard

Answer:

$8.10

Step-by-step explanation:

Take the initial value ($54) and multiply it by 15% by turning 15%into a decimal.

15% --> .15 (divide by 100 and remove the %)

54 × .15 = 8.1 or $8.10

i need help ASAP please answer these questions! ASAP

Answers

16 is the answer BRAINEST plz

Step-by-step explanation:

12=3/4

12÷3=4

4/4 = 16

pls help !!!!!!!!!!!!!!!!

Answers

Answer: A. y = 4x + 3 is the correct answer.

Carlos created a drawer with an open top for a cabinet. The prism shown represents the drawer.
Which face of the net represents the open face of the prism?
A
В
С
D

Answers

Answer: C.

Explanation: C is the top part of the drawer, which is the open section.

Answer:

the answer is c

Step-by-step explanation:

10. Square is a
a. Rectangle
b. Rhombus
c. Both
d. None of these​

Answers

Answer:

d. None of these​

Hope it helps

Have a great day : )

Answer:

Square is a rhombus. (option b)

Select the right answer?

Answers

Answer:

opposite sides are parallel

Answer:

Option A.) All 4 sides are congruent.

Step-by-step explanation:

Because this chapter is related to Rhombus.

A laundromat has a wash-and-fold service for a monthly fee of $29.00. The laundromat will wash and fold clothes at $0.69 per pound for those customers with a laundry service. One customer paid $44.18 total for the month.

Which equation can be used to determine the pounds of laundry the customer brought in to be washed and folded that month?
A.
44.18 + 29.00 = 0.69x
B.
0.69x + 29.00 = 44.18
C.
0.69x + 44.18 = 29.00
D.
29.00 - 0.69x = 44.18

Answers

Its B cause the total amount needs to be 44.18 and the change 0.69x needs to be positive

how do you classify a triangle by its side measurements​

Answers

Answer:

Equilateral triangle

Isosceless triangle

Scalene triangle.

Step-by-step explanation:

- If all the sides of the triangle are equal, the triangle is said to be an equilateral triangle.

- If 2 sides of the triangle are equal, the triangle is said to be an Isosceless triangle

- If no side of the triangle is equal, the triangle is said to be a scalene triangle.

15h - 4 = 6
Two step problem

Answers

Answer:

h = 10/15

Step-by-step explanation:

Isolate the variable, h. Note the equal sign, what you do to one side, you do to the other. Do the opposite of PEMDAS.

PEMDAS is the order of operation, and stands for:

Parenthesis

Exponents (& Roots)

Multiplication

Division

Addition

Subtraction

First, add 4 to both sides of the equation:

15h - 4 (+4) = 6 (+4)

15h = 6 + 4

15h = 10

Next, divide 15 from both sides of the equation:

(15h)/15 = (10)/15

h = 10/15 or 0.667 (rounded)

A principal of $19,500 is invested at 6% annual simple interest for 9 years. How much interest is earned?

Answers

Answer:

$10,530

Step-by-step explanation:

I = Prt

P = 19500

r = 0.06

t = 9

I= 19500 x 0.06 x 9

I = 10530

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