Mathematics High School

The perimeter of the rectangle is 42 inches. Find the value of x.

Answers

Answer 1

Answer:

x=3

Step-by-step explanation:

(5x*2)+ ((x-3)2)=42

10x+2x-6=42

12x-6=42

-6 -6

12x=36

x=3

Answer 2

Answer:

x=3

Step-by-step explanation:

(5x*2)+ ((x-3)2)=42

10x+2x-6=42

12x-6=42

-6 -6

12x=36

x=3

Related Questions

Fill in the blank.

(45)×(512) = ___ / 5×12

Answers

Answer:

x=1382400

this should be right

Answer:

1382400

Step-by-step explanation:

Well, we can first find that 5x12 is 60 so if you substitute it, it would be:

45x512 = ___ / 60

We can also substitute ___ as x:

45x512 = x/60

45x512 is 23040 so, 23040 = x/60.

Bring sixty to the other side and multiply

x= 23040 x 60 = 1382400

Which equation represents a line that is perpendicular to y=x?

A.

y=2x

B.

y=−x+6

C.

y=−2x

D.

y=x+1

Answers

Answer:

Step-by-step explanation:

The general equation of a straight line can be represented as;

y = mx + b

where m is slope

If two lines are perpendicular, the product of their slopes will be -1

So since the slope of the first line is 1, then the slope of the second line will be -1

Out of all the options, only have its slope as -1 and this y = -x + 6 and this is our answer

answer this question

Answers

Answer:

a = p * q

b = p * s + q * r

c = r * s

Step-by-step explanation:

In the trinomial ax² + bx + c

a is the coefficient of x²

b is the coefficient of x

c is the numerical term

∵ The trinomial is ax² + bx + c

∵ Its factors are (px + r) and (qx + s)

∴ ax² + bx + c = (px + r)(qx + s)

∵ (px + r)(qx + s) = (px)(qx) + (px)(s) + r(qx) + (r)(s)

∴ (px + r)(qx + s) = pqx² + (psx + qrx) + rs

∴ ax² + bx + c = pqx² + (ps + qr)x + rs

→ By comparing the two sides

∵ ax² = pqx² ⇒ divide both sides by x²

∴ a = pq

∵ bx = (ps + qr)x ⇒ Divide both sides by x

∴ b = ps + qr

∴ c = rs

∴ a = p * q

∴ b = p * s + q * r

∴ c = r * s

A racehorse breeder's sells feed by the ton (2000 pounds). They add a special supplement to the feed. Each horse needs 300 milligrams (mg) of this supplement a day and each horse consumes 15 pounds of the feed per day. If there are 1,000 milligrams in a gram, how many grams of the medication should the feed company add for each ton of feed they produce

Answers

Answer: 40 grams

Step-by-step explanation:

Each horse needs 300 milligrams and each horse eats 15 pounds of feed per day.

This means that 300 milligrams should be in 15 pounds of feed.

In 2,000 pounds therefore, the medication that should be added is;

= (2,000 * 300) / 15

= 40,000 milligrams of supplement

Question calls for how much grams are needed.

1 gram is 1,000mg

40,000 milligrams is;

= 40,000/1,000

= 40 grams

What is the equation of the line that passes through the points (3,8) and (6,2)?

Answers

Answer:

y = −2x+14

plot the points on a graph, and find the slope :)

Solve the proportion 2/7=c/28
Hurry!!!

Answers

Answer:

C = 8

Step-by-step explanation:

2/7 = c/28

Multiply to get c by itself

2/7 x 28 = c

Solve

2/7 x 28 = 8

C = 8

The value of c is 8 in the proportion 2/7=c/28.

What is Equation?

Two or more expressions with an Equal sign is called as Equation.

The given proportion is 2/7=c/28

Two divided by seven equal to c divided by twenty eight.

We have to find the value of c.

We find the value of c by applying cross multiplication

28×2=7c

56=7c

Divide both sides by 7

56/7=c

Divide numerator and denominator by 7

We get c=8

Hence, the value of c is 8 in the proportion 2/7=c/28.

To learn more on Equation:

https://brainly.com/question/10413253

#SPJ2

Solve: negative 1 over 2 x + 1 = −x + 8 (5 points)

a
7

b
1 over 2

c
14

d
18

Answers

it is 14 because if you have -1/2x + 1 = -x + 8 you would combine the multiplied terms into a single fraction then subtract the one from both sides simplify till you get -x/2 = -x + 7 then you will add like terms so the x’s then you multiply all terms by two like 2(-x/2)= 2•7 then you can get 14.
(Sorry if you didn’t need the whole explanation)

Answer:

A rock that weights 250 pounds on Mars would weigh on Earth:

250/x = 2/5x = 250*5/2x = 625 pounds

A machine is used to stamp bottle caps. If 150 bottle caps can be stamped in 30 s, the rate is _______ caps per second.

Answers

Answer:

5 bottle caps each second

Step-by-step explanation:

To find the unit rate, just divide the total number by the total time.

150/30

So 5 bottle caps per second

y=x
y= 11x-10

simultaneous equation

Answers

Answer:

y = 1

x = 1

Step-by-step explanation:

If y = x

Replace x with y

y = 11y - 10

y - 11y = -10

-10y = -10

y = 1

Hope this helps!

Have a nice day!

If you find my answer helpful

Pls consider marking my answer as Brainliest! It would mean a lot!

In 2009, a poll found that 47% of people favored the protection of the environment at the risk of limiting energy supplies, while 47% favored the development of energy supplies even if that risked harming the environment. Another 4% felt that energy and the environment were equally important. what's the probability a person had "No Opinion"? NEED HELP ASAP!

Answers

Answer:

It will be 84

Step-by-step explanation:

With a two-year agreement, Sarah can add up to 4 lines for $9.99 each. Her first monthly bill totals 89.96. Sarah did not exceed the "anytime minutes" limit and did not engage in "text messaging". How many lines did she add to her plan? Write an equation, and then solve.

Answers

Answer:

The answer is 267.

Step-by-step explanation:

If we wanted to represent this scenario as an equation, it would be 22.40-14+.5x (x being the amount of texts after 250). We are using PEMDAS, but because the variable is unknown, we skip multiplication and just go left to right. 22.40 - 14 = 8.40. With 8.40, we now know how much it costed AFTER 250 messages (how much she owes after $14). If we want to find how many PER 50 cents, we have to DIVIDE (reverse of multiplication). 8.4 / .5 = 16.80. Because you can't send .8 of a text message, you round to get 17. 250 + 17 = 267 (messages sent that month).

Therefore the answer is 267 (250 + 17)

Rebecca is on the swim team. If you can swing 24 labs in six minutes how long would it take her to swim 36 laps

Answers

Answer:

Step-by-step explanation:

if you think bout it 24/6 is 4 and 36/9 is 4

Michelle plans on raising $80 for her softball team. To raise the money, she is selling team shirts for $10 each.
So far she has raised $20. To calculate how many more shirts she needs to sell, Michelle subtracts 20 from 80
and then divides by 10.
Which of the equations below can be solved using the same steps?
A. 10x + 20 = 80
B. 20x + 10 = 80
C. 80x - 20x = 10
D. 10x + 20x = 80

Answers

Given:

Michelle plans on raising $80.

Selling price of each shirt = $10

So far she has raised $20.

To find:

The number of more shirts she needs to sell.

Solution:

Let x be the number of more shirts she needs to sell.

Selling price of one shirt = $10

Selling price of x shirt = $10x

Total raising amount = $(10x + 20)

Michelle plans on raising $80. So,

[tex]10x+20=80[/tex]

Subtract both sides by 20.

[tex]10x=80-20[/tex]

[tex]10x=60[/tex]

Divide both sides by 10.

[tex]x=\dfrac{60}{10}[/tex]

[tex]x=6[/tex]

So, the required equation is [tex]10x+20=80[/tex]

Therefore, the correct option is A.

When Carla looked at the library, she noticed that for every 2 nonfiction books, there were 5 fiction books. If there are 161 books total, how many of them are not nonfiction books.

Answers

Answer:

138 nonfiction

Step-by-step explanation:

Ratio problem, we are going to use the part to all approach

Step one:

given data

the ratio of nonfiction to fiction books is 2 to 5

otherwise expressed as 2:5

the total ratio is 2+5= 7

the total number of books is 161,

applying the part to all approach

nonfiction to all is

let the nonfiction be x

2/7=x/161

cross multiply we have

7x= 161*6

7x=966

divide both sides by 7

x=966/7

x=138 nonfiction

138 nonfiction

please help i give brainliest to who ever gets it right!!!!!!

Answers

Answer:

Step-by-step explanation:

Opposite numbers will be numbers with opposite signs

Option D shows -3 at one end and +3 at the other; their sum is 0

the answer is D mark the other dude brainlist

What is 87,000,000 in scientific notation

Answers

Answer:

8.7 * 10^7

Step-by-step explanation:

Scientific notation is a representation of huge but countable numbers at it's unit place with an expansion of the powers of 10.

Hence,

87,000,000

=87*10^6

=8.7*10^7

Chelsea is budgeting for her trip to the mall. She
does not want to spend any more than $140. If
she wants to buy a dress that costs $28.50 and
I some shirts that cost $20.75 each, how many
shirts can she buy? Use the inequality to help
solve the problem.
140 > 28.50 + 20.75x

Answers

Answer:

Chelsea can buy 5 shirts.

Step-by-step explanation:

Subtract 28.50 from 140. This is because subtraction is the inverse of addition, so it will cancel out. 111.50 > 20.75xDivide both sides by 20.75. Division is the inverse of multiplication. 5.3734939759 > x

You can't split shirts when buying them, so Chelsea can buy 5 shirts.

can someone please help .. will mark brainliest !

Answers

Answer:

B and B

Step-by-step explanation:

The first one is B because all of the slopes are negative except B. And so I think that's the correct answer

The second one I know is B for sure, I remember learning it in 8th grade 2 years ago.

It's really just the first one I am second guessing myself on but B and B make sense to me :)

place the following numbers in order from least to greatest

-8.2, 0.4, NEGATIVE 2 AND 1/2, and 2.4

Answers

Answer:

-8.2,-2 1/2, 0.4,2.4

Step-by-step explanation:

hope that helps

Whats % is 4 of 16 ?

Answers

Answer:

25 percent

Step-by-step explanation:

percent=1/100

16 times x=4

16 times 1/4=4

Answer:

.06 % (6%)

Step-by-step explanation:

I'm not good at explaining but,

Using baseball method I:

Simplify 6(x + 2)- x(x - 1) []What is the correct order of the rise and fall ofthe 3 great west African empires? The countryon the left is the first to rise and the country onthe right is the last to rise. plssss I will give brainlist 1.match words and picture 2.in the space provided write whether the visual area is 2D or 3Dpls complete the answer Select the most appropriate follow up to the following phrase:Buenas noches.A: Muy bien, gracias.B: Ms o menos, por favor.C: Cmo anda?D: Que duerma bien! Directions - Convert each equation to slope intercept form.A) 2x + 2y = 10B) 12 + 4y = -44 Many financial advisers tell clients to have diversity when creating financial investments.Which combination would create the greatest diversity?A. Bonds and bond-based mutual findsB. Stocks and stock-based mutual findsC. Savings account and certificate deposit D. Savings account, certificate of deposit, and variety of stocks. Decide if the following underlined conjugation is grammatically CORRECT or INCORRECT.Je choisisse mes cours scolaires en juin. Given: ABC, mA=60 mC=45, AB = 9Find: Perimeter of ABC Area of ABCABC is scalene 2x to the power of negative 1, multiplied by 4x squared equals The ______ is used to describe two actions.A) superlativeB) comparativeC) positiveD) adjective A surgical procedure requires choosing among four alternative methodologies. The first can result in five possible outcomes, the second can result in two possible outcomes, and the remaining methodologies can each result in four possible outcomes. What is the total number of outcomes possible? There are 12 inches in a foot in april mrs Harris used 32 feet of ribbon for an art club in may she used 45 feet of ribbon how many more inches of ribbon did mrs Harris use in may than April (c) What is the value of p if 4x + 20x + p is aperfect square Describe the three kinds of particles found in atoms. Where are they located in the atom and what are their charges? The use of cognition to search for information, analyze it, and then express the analysis of information is:__________ a) Piaget's theory of cognitive perspective. b) referred to as working memory. c) the information processing perspective. d) Vygotsky's zone of proximal discovery. 20 points +a brainlyestThe increase in school violence has prompted one district to institute a school uniform policy. This decision came after researching the positive impact of uniforms in other schools. What is your position on this issue? Write a paragraph identifying your topic of choice, your position on the topic (for or against? Yes or no?) and give at least two reasons to support your position. Then write at least one counterclaim and a reason that an opponent of your position would refute your claim. - 2-3 pages in length - 3 reliable outside sources for support - Must utilize MLA style formatting and citations - Must include a Works Cited page - Must address counterargument(s) - Must include a colon to introduce a list or quotation Translate the following plural noun phrases into Spanish.5. our books6. your (familiar) pants7. their shoes BRAINLIEST FOR CORRECT ANSWER!At a sale, dresses were sold for $24 each. This price was 12% of a dress's original price. How much did a dress originally cost? Shapiro speaks of Abraham Lincoln and suggests that we should all read what book by Doris Kearns Goodwin? A. Team of Rivals.B. Bully Pulpit.C. Baseball Heroes I Have Known.D. Abe Lincoln, Master Negotiator.E. Abe Lincoln and the Winnning of the Civil War. Cathy's food usually costs $212.90 a week. One week, it cost $198.98. Howmuch less money did she spend that week?