Mathematics High School

5. The rectangular pool has an area of 520 square feet. The length of 3
more than its width. Which of the following equations represent length 2, in feet of the room?
a) z(z+11) =520
b) z(z - 11) = 520
c) z(11 - 2) = 520
d) - 112 - 520 = 0
e) 2 + 112 - 520 = 0
11z +520 =

Answers

Answer 1

Answer:

z*(z - 3) = 520

Step-by-step explanation:

Use the following representations:

Width:  W  

Length:  L = W + 3, or W = L - 3

Area = L*W = L*(L - 3) = 520

Equation b) is the correct one:  z*(z - 3) = 520

Related Questions

Which ordered pair would form a proportional relationship with the point graphed below?

On a coordinate plane, point (negative 20, 40) is plotted.
(–40, 20)
(–10, –20)
(15, –30)
(5, –15)

Answers

Which ordered pair would form a proportional relationship with the point graphed below?

On a coordinate plane, point (negative 20, 40) is plotted.
(–40, 20)
(–10, –20)
(15, –30)
(5, –15)

The answer is c

Answer:

it is c

Step-by-step explanation:

i got it right on egde

An aquarium keeps 5 fish in every 100 gallons of water. How many gallons of water are needed for 25​ fish?

Answers

Answer:

500 gallons

Step-by-step explanation:

25/5=5 5*100=500

Answer:

You need 500 gallons for 25 fish

Step-by-step explanation:

If 5 fish = 100 gallons, you need to find out 25 = ? gallons.

25 ÷ 5 = 5. 100 x 5 = 500 gallons.

What do the horizontal lines in an elevation-versus-time graph mean?

Answers

It means it shows no change

The formula A=lw gives the
area A of a rectangle with
length 1. What is the area in
square feet of a rug with a
length of 13 feet and width of
6 feet?

Answers

Answer:

78 ft^2

Step-by-step explanation:

A = lw

l = 13 ft

w = 6 ft

A = 13ft  x 6 ft

A = 78 ft^2

Multiply the length by width to find Area. The unit for Area will be feet squared because both the numbers for length and width had the same unit.

what’s pi? (i actually kno what it is i’m jus bored lol)

Answers

Answer:

3.14159 and so on

Step-by-step explanation:

Lol it’s an infinite decimal

Kelly is knitting a scarf for her brother. It took her 1/5 hour to knit 2/5 foot of the scarf. How fast is Kelly’s knitting speed, in feet per hour?
You help me I help you!

Answers

Answer: 9/8 feet per hour fast is Kelly's knitting speed

Step-by-step explanation:

Unit rate defined as the rates are expressed as a quantity 1 such as 4 meters per second or 4 miles per hour.

As per the statement:

Kelly is knitting a scarf for her brother. it took her 1/3 hour to knit 3/8 foot of the scarf.

She took /3 hours to knit 3/8 foot of the scarf.

Therefore, 9/8 feet per hour fast is Kelly's knitting speed.

Hope I helped!

helpppppp plssssssss

Answers

Answer:

DZE= 80 degrees

AZF= 30 degrees

AZB= 80 degrees

BZC = 70 degrees

Step-by-step explanation:

Conclusion sentence for pop art

Answers

need more info please??

This is prob really easy

Answers

Answer:

3-(-2)=3+2 {The negative signs will become +)

and 3+2=5

so option 4 is correct

Answer:5

Step-by-step explanation:

whenever a negative is multiplied by a negative, it becomes a positive.

so: 3-(-2)—>3+2=5

Thirteen less than twice a number is fifteen. What is the equation? What is the number?

Answers

2x-13=15 is the equation. The number (x) is 14

Hi there!

Let the unknown number be c.

Twice a number means we multiply that number by 2:

2c

Now, subtract 13:

2c-13

This expression is equal to 15:

2c-13=15

As soon as I added the equal sign, and the number than the expression is equal to, the expression turned into an equation.

Now, let's solve it for c.

2c=15+13

2c=28

c=14

Hope everything is clear :-)

please can someone help asap this hw is due in a few hours

Answers

Answer:

.05 euro for each 1 pack of small,  around .051 euro for each medium, and around .052 euro for 30

Step-by-step explanation:

best to go for the small pack.  ill be .50 euros to get 10 small packs, .51 euros to get 10 medium packs, and .52 euros to get 1- big packs

This is my best guess, so don"t be rewarding me yet till you get it right

(this is the skeleton in your closet saying don"t forget to thank your gifts

x/11 - 4 = 9/22
what is x

Answers

Answer:

x=97/2 or x=48.5 or 48 1/2

Answer:

x=97/2 or 2x=97

Step-by-step explanation:

hope it helps

If x represents a number, write an expression that represents a number 10 greater than x

Answers

Answer:

Step-by-step explanation:

If y varies directly as x squared and y = 72 when x =3, what is the value of y when x = 6? a. 18 b. 24 c. 288 d. 144 Please select the best answer from the choices provided A B C D

Answers

Answer:

it b why becaus

Step-by-step explanation:

Answer:

The answer is C. 288    

Just took the test

Step-by-step explanation:

I need some help with this​

Answers

Pretty sure it’s c sorry if it’s wrong

Multiple Choice Start Root 400 End Root= A. 20 B. 18 C. 16 D. 14

Answers

Answer:

a

Step-by-step explanation:

root 400 is 20.

solve for a and b
(6a-3)=(7b-10)

Answers

Answer:

for A=[tex]\frac{7b-7}{6}[/tex] and for B=[tex]\frac{6a+7}{7}[/tex]

Step-by-step explanation:

For A

[tex]\left(6a-3\right)=\left(7b-10\right)[/tex]

[tex]6a-3+3=7b-10+3[/tex]

[tex]6a=7b-7[/tex]

[tex]\frac{6a}{6}=\frac{7b}{6}-\frac{7}{6}[/tex]

[tex]a=\frac{7b-7}{6}[/tex]

For B

[tex]\left(6a-3\right)=\left(7b-10\right)[/tex]

[tex]7b-10=\left(6a-3\right)[/tex]

[tex]7b-10=6a-3[/tex]

[tex]7b-10+10=6a-3+10[/tex]

[tex]7b=6a+7[/tex]

[tex]\frac{7b}{7}=\frac{6a}{7}+\frac{7}{7}[/tex]

[tex]b=\frac{6a+7}{7}[/tex]

Christina went to the store and spent $6.91 for her science project. She gave the cashier $9.00. Estimate the amount of change the cashier should give Christina.

Answers

Answer:

$3.09

Step-by-step explanation:

1) On a road map, the distance from Louisville to St. Louis is 12 cm. If the map has
a scale of 2 cm = 20 miles, what is the distance to St. Louis?

Answers

On the scale of 2cm = 20 miles, take 12 Divided by two which will give you 6 Times 20 equals 80 miles

120 miles.

All you have to do to understand this problem is the relationship between the cm and mi.

In this case:

2cm =20mi.

The relationship is times 10, because 2 x 10=20

So multiply 12 by 10, and you will get 120mi.

Therefore, the answer is 120mi.

Please mark branliest if this helped.

Thank you

Solve using Substitution
y = -1x - 5
4x - 8y = 4

Answers

Answers:

Step-by-step explanations:

Can someone help me ASAP please

Answers

Answer:

Y=2x-3

Step-by-step explanation:

Solve For x in terms of a y and z.

3xy - z = 2z + 5

Answers

Answer

x= z/y + 5/3y

Step-by-step explanation:

You are researching the average emails received per day. You want to know how many employees you should survey if you want to know, at a 90% confidence level, that the sample mean emails per day is within 47 emails of the true mean emails per day. From above, we know that the population standard deviation is 155, and z-value is 1.645$_

Answers

Answer:

The value is  [tex]n =29 \ employees [/tex]

Step-by-step explanation:

Generally the number of employee to survey(sample size) is mathematically represented as

       [tex]n = [ \frac{z *  \sigma }{E} ]^2[/tex]

Here E is the margin of error which is given as E = 47

So substituting 1.645 for z and   155 for  [tex]  \sigma[/tex]

     [tex]n = [ \frac{1.645 *  155 }{47} ]^2[/tex]

=>    [tex]n =29 \ employees [/tex]

     

         

what is the distance between -3/7 and 2/8​

Answers

Answer:

[tex] \frac{19}{28} [/tex]

Step-by-step explanation:

distance between -3/7 and 2/8

[tex] = \frac{2}{8} - \bigg( - \frac{3}{7} \bigg) \\ \\ = \frac{2}{8} + \frac{3}{7} \\ \\ = \frac{2 \times 7}{8 \times 7} + \frac{3 \times 8}{7 \times 8} \\ \\ = \frac{14}{56} + \frac{24}{56} \\ \\ = \frac{14 + 24}{56} \\ \\ = \frac{38}{56} \\ \\ = \frac{19}{28} [/tex]

A theater is presenting a program on drinking and driving for students and their parents or other responsible adults. The proceeds will be donated to a local alcohol information center. Admission is for adults and for students.​ However, this situation has two​ constraints: The theater can hold no more than people and for every two​ adults, there must be at least one student. How many adults and students should attend to raise the maximum amount of​ money?

Answers

There should be 2 kids

find the number of possible positive real zeros of f(x)= -7x^4+ 49x^3+ 84x^2.
A.three
B.two or none
C.one
D.none

Answers

B.Two is your answer

Elle has a sticker book with 12 pages of stickers. Her friend Erin's book has 3 times more pages. How many pages are in Erin's book?

Answers

Answer:

36 pages

Step-by-step explanation:

12 multiplied by 3 is 36

36 pages
12 (Erin’s total number of pages) x 3 times Erins pages = 36 Erins friends total pages

What value of x makes this equation true?
5(x + 4) = 3x + 28
A. 4
B. 6
C.
12
D. 24

Answers

A. 4

5(4+4)=3(4)+28. This is true

5(4+4) is 40
3(4)+28 is 40
40=40.

A is correct
4

What is "y equals seven less than four times a number" translated into?

Answers

Answer:

4x-7=y

Step-by-step explanation:

i think that's rightt

4x-7=y I think so because it says seven less than four then times a number so

Help me solve this problem please

Answers

Answer:

I am assuming that you are talking about problem 2. so I will answer that.

Step-by-step explanation:

-2x + 6 ≥ 3x - 34

+2x        +2x

        6 ≥ 5x - 34

      +34       + 34

       40 ≥ 5x

       ÷5    ÷5

        8 ≥ x

So, x can be anything equal to or less than 8.

Answer:

x≤8

For the graph closed circle on 8 with the shading going to to left

Step-by-step explanation:

-2x+6≥3x-34 (given)

Subtract 6 on both sides

-2x≥3x-40

Subtract 3x on both sides

-5x≥-40

Divide by -5 on both sides

x≤8

*The sign flips because you divided by a negative (-5x)

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