Mathematics Middle School

Write an expression to represent the perimeter of:
2a-3
2a
3a+1

Answers

Answer 1
I am assuming this is a triangle.....P = a + b + c

P = 2a - 3 + 2a + 3a + 1....combine like terms
P = 7a - 2 <==

Related Questions

How do you solve these 2 problems

Answers

11.The answer is -13
13.The answer is -108

Ahmad drove 638 miles in 11 hours. At the same rate, how long would it take him to drive 522 miles?

Answers

It would take him 9 hours to drive 522 miles since if you divide 638 with 11 you would get 58 and if you divide 522 with 58 you'll get 9. 

Answer:

9

Step-by-step explanation:

Maria has 5 6/7 square yards of fabric. She uses 2 2/3 square yards fo fabric to make a dress. Does she have enough fabric left over to make a shawl that takes 2 1/4 square yards of fabric?

Answers

yea she has enough to get the third
5 6/7 - 2 2/3 =

5 - 2 = 3
6/7 - 2/3 = 18/21 - 14/21 = 4/21
3 + 4/21 = 3 4/21
so she has 3 4/21 yds left over....so yes, she has enough to make the shawl that takes 2 1/4 yds

What is the relationship between the values of the two 4s in 3.441

Answers

The first 4 (.4) is 10x bigger than the second 4 (.04)

Answer:

The given number is 3.441

The first 4 is in the tenth place that is written like [tex]\frac{4}{10}[/tex] or 0.4

The second 4 is in the hundredth place that is written like [tex]\frac{4}{100}[/tex] or 0.04

We can see that the second 4 is one tenth times the first 4. This is shown like = [tex]\frac{1}{10} \times\frac{1}{10}[/tex] = [tex]\frac{1}{100}[/tex]

Or we can say the opposite that the first 4 is ten times the second 4.

When a coordinate grid is superimposed on a map of harrisburg the highschool is located at (17,21) and the town park is located at (28,13) . If each unit represents 1 mile, how many miles apart are the highschool and the town park? round your answer to the nearest tenth

Answers

To find the distance between the high school at (17,21) and the town park at (28,13), use the distance formula which yields a result of approximately 13.6 miles apart, rounded to the nearest tenth.

When looking at the coordinates of the high school at (17,21) and the town park at (28,13) on a coordinate grid where each unit represents 1 mile, we need to use the distance formula to calculate the distance between the two points. The distance formula is derived from the Pythagorean theorem and is given by:

[tex]Distance = \sqrt{(x2 - x1)^2 + (y2 - y1)^2}[/tex]

Substituting the values -

[tex]Distance = \sqrt{{(28 - 17)^2 + (13 - 21)^2}[/tex]

Calculate the differences and square them:

Distance = [tex]\sqrt{{(11)^2 + (-8)^2}\\[/tex]

Distance = [tex]\sqrt{{121 + 64}[/tex]

Distance = [tex]\sqrt{{185[/tex]

Take the square root to find the distance:

Distance = 13.6 miles

Therefore, the high school and the town park are approximately 13.6 miles apart, rounded to the nearest tenth.

A 5-pound bag of apples cost $3.50. Use that rate, to complete the table to identify equivalent ratios, and then answer the questions. Apples *? 5 ? 15 Cost 0.70 3.50 7 ? Apples cost $ __ per pound.

Answers

Answer:

Cost 0.70 per pound.

Step-by-step explanation:

If you see the cost and the weight you can get the price per pound, so if 5 pounds cost $3.50, you can evaluate doing a rule of three:

[tex]\frac{3.50}{5}=\frac{x}{1}[/tex]

So if you clear X you´d get this:

[tex]x=\frac{(3.5)(1)}{5}[/tex]

[tex]x=0.70[/tex]

So the cost per pound is $0.70.

Now that you have the cost per pound you can do the equivalent ratios:

Cost---------------Apples

0.70---------------1 pound

3.5--------------- 5 pounds

  7---------------  10 pounds

Answer:

0.70 per pound.

Is 3.2 a rational number?

Answers

The number is between integers, so it can't be an integer or a whole number. It's written as a ratio of two integers, so it's a rational number and not irrational. Allrational numbers are real numbers, so this number is rational and real.
Yes , all rational numbers are real numbers, so this number is rational and real

The sum of two consecutive numbers is 95. What are the two numbers?

Answers

[tex]\huge{\boxed{47}}\ \ \huge{\boxed{48}}[/tex]

First, represent the situation with numbers and variables. The first number will be [tex]x[/tex] and the second number will be [tex]x+1[/tex]. [tex]x+x+1=95[/tex]

Combine like terms. [tex]2x+1=95[/tex]

Subtract 1 on both sides. [tex]2x=94[/tex]

Divide both sides by 2. [tex]x=\boxed{47}[/tex]

Find the second number. [tex]x+1\ =\ 47+1\ =\ \boxed{48}[/tex]

how many integers are greater than 9 37 and less than 37 9

Answers

The integer between this two given integer, If the two given interger in inclusive we will calculate it using 37 - 9 + 1 = 29. So we will have a total of 29 interger in the number line if both the given integer is included.

But if the two given integer in excluded we will subtract both,  we will calculate it by 37 - 9 - 1 = 27. So we will have a total of 27 integer if both the number is excluded.

How do you join the bar you left weighs 45 pounds you add weight to the bar that are 10 pounds each if you add six weights to the bar how many pounds will you left

Answers

Hello!

45 + 10 + 6 = 61

So, your answer is 61.

I hope that was helpful! c:

What property is this? if -5x-1=-11, then -5x=-10

Answers

I believe X is equal to 2 

Then, the answer would be x=-2.

What is k/4+2-k=10.

Answers

i hope this help answer that

which of the following are equivalent to 0.625 625/1000 100/625 5/8 125/200 20/125

Answers

625/1000= 0.625

100/625= 0.16

5/8= 0.625

125/200= 0.625

20/125= 0.16

Solve the inequality.Explain all steps and Identify the properties used. n/-3 + 5>4

Answers

n/-3>4-5 
then you can just times by -3 to get n on it's own
n>-3(4-5)
n>-3*-1
n>3
For this..
[tex]\frac{n}{-3}+5 \ \textgreater \ \mathrm{Apply\:the\:fraction\:rule}:\ \frac{a}{-b}=-\frac{a}{b} \ \textgreater \ -\frac{n}{3}+5 \ \textgreater \ \frac{n}{3}+5\ \textgreater \ 4[/tex]

[tex]\mathrm{Subtract\:}5\mathrm{\:from\:both\:sides} \ \textgreater \ -\frac{n}{3}+5-5\ \textgreater \ 4-5 \ \textgreater \ \ \textgreater \ -\frac{n}{3}\ \textgreater \ -1[/tex]

[tex]\mathrm{Multiply\:both\:sides\:by\:}3 \ \textgreater \ 3\left(-\frac{n}{3}\right)\ \textgreater \ 3\left(-1\right) \ \textgreater \ \mathrm{Simplify} \ \textgreater \ -n\ \textgreater \ -3[/tex]

[tex]\mathrm{Multiply\:both\:sides\:by\:-1\:\left(reverse\:the\:inequality\right)} [/tex]
[tex]\left(-n\right)\left(-1\right)\ \textless \ \left(-3\right)\left(-1\right) \ \textgreater \ \ \textgreater \ \mathrm{Simplify} \ \textgreater \ n\ \textless \ 3[/tex]

Hope this helps!

answer the question in the image

Answers

Answer:  The percentage of decrease is:  " 33 ⅓  %" .
_____________________________________________
Explanation:
____________________________________________
Given:
____________________________________________
  10 years ago, # of illiterate people = 150 lakhs;
 
   "Now" ;   # of illiterate people = 100 lakhs ;
____________________________________________
So; the decrease in the # of illiterate people = "(150 - 100) = 50 lakhs ;
____________________________________________
To calculate the "percentage of decrease" :
____________________________________________
   The "percentage of decrease" =

{"decrease in the # of illiterate people"} / {"# of illiterate people started with"] ; 

                                                                            ×  100 (percent). 
__________________________________________________
                                      =  [tex] \frac{50}{150} [/tex]  * 100 % ;

{Note that:  [tex] \frac{50}{150} [/tex] = [tex] \frac{5}{15}[/tex] ;
 → The "zeros" cancel out ;

→ [tex] \frac{50}{150} [/tex]  * 100 % ;
     
 = [tex] \frac{5}{15}[/tex] * 100 ; 

Note:  [tex] \frac{5}{15}[/tex] =  [tex] \frac{(5/5)}{(15/5)} [/tex] ;
                                              =  [tex] \frac{1}{3} [/tex] ;
__________________________________________________
→ [tex] \frac{1}{3}[/tex] * 100 = [tex] \frac{1}{3}[/tex] * [tex] \frac{100}{1}[/tex] ;
_________________________________________________________
      = [tex] \frac{(1*100)}{(3*1)} [/tex]  % ;
 
      = [tex] \frac{(100)}{(3)} [/tex]  % ;

      = "(100 ÷ 3) % ;

      =  " 33 ⅓  % " .
_____________________________________________________
Answer:  The percentage of decrease is:  " 33 ⅓  %" .
_____________________________________________________

(6.5/2) to the second power. Simplify

Answers

14 Bc 6.5 + 6.5 = 12 + 1/2+1/2 = 13

When 12.393 and t are added together, the result is 20.463. What is the value of t?

Answers

t= 8.043 because 20.436 - 12.393 = 8.043                                                                                                                       
                        
12.393+t=20.463
subtract 12.393 by both sides
t=8.07

How do you determine if a set of ordered pairs is a function or not?

Answers

You could set up the relation as a table of ordered pairs. Then, test to see if each element in the domain is matched with exactly one element in the range. If so, you have a function! Watch this tutorial to see how you can determine if a relation is a function.
A function is a set of ordered pairs in which no 2 pairs with the same first element have a different second element. 

If you think about it, it makes sense. Think about  f(x) = x + 1. The pairs (x, f(x)) look like (1,2), (2,3), (3,4), (4,5), etc. If you also had (1,3) in the set, then there'd be two different answers for 1+1. The same applies to any function. There can only be one result for a given input value. Your welcome!!

An international company has 13,600 employees in one country. If this represents 19.3% of the company's employees, how many employees does it have in total?

Answers

Hi there! To solve this question, we can write and solve a proportion. Let’s set it up like this: 13,600/x = 19.3/100. We do this, because we’re looking for the total amount of people, which would be the whole. We already have the part. Cross multiply the values in order to get 1,360,000 = 19.3x. Now, divide each side by 19.3 to isolate the variable. When you do, you get x is approx. 70,466.3212 or 70,466 when rounded to the nearest whole number. Plus, you can’t have a fraction of a person, anyway. The company has a total of 70,466 employees.

PLEASE HELP ASAP!!!! 10 POINTS!!!

what is the solution to the proportion

5/x =2/8

Answers

5/x=2/8, so to solve the proportion cross multiply, try to have no fraction basically, 2x=40, now solve for x, x=20 
The answer is x=20 because when cross multiplied (40=2x) and divided (40/2=2x/2) you get 20=x

Hope this helps!

What are the missing angles?

Answers

y=30
2y=60

i believe this is the correct answer
y +90+2y=180
3y=90
y=30
2y=60

What’s 3x+6y=12 in the form y=mx+b

Answers

Hey there!

3x+6y=12

Divide both sides by 3 and your equation would now look like:
x+2y= 4
Move the x to the other side
2y= -x+4
Seprate the y by dividing both sides by 2
y= [tex] \frac{1}{2} [/tex]x+2
3x + 6y = 12

3x(-3x) + 6y = 12 (-3x)

6y = -3x + 12

6(y)/6 = (-3x + 12)/6

y = -1/2x + 2

hope this helps

The population of a town decreased from 15,925 people to 8759 people. What was the approximate percent decrease?

Answers

fourty four. nine percent so fourty five
65%

% change = 15925 / (15925 + 8759) 

Simplify: % change = 15925 / 24684 = 0.645 = 64.5% which is 65% rounded. 

evaluate n/6 when n=12

Answers

When asked to evaluate, you have to plug in the given value of n (in this case), into the given equation.

n/6 = ?
In order to find out ?, we need to know what n is.
Well, n = 12
So, plug in 12 for n
n/6 would now be written as 12/6 in order to be evaluated
Now, simplify.... What you get for 12/6 is the answer

Answer:

When [tex]\( n = 12 \), \( \frac{n}{6} \)[/tex]  equals [tex]\( 2 \).[/tex]

Explanation:

To evaluate [tex]\( \frac{n}{6} \)[/tex]  when [tex]\( n = 12 \)[/tex] , simply substitute [tex]\( n = 12 \)[/tex] into the expression:

[tex]\[ \frac{n}{6} = \frac{12}{6} \][/tex]

[tex]\[ \frac{n}{6} = 2 \][/tex]

So, when [tex]\( n = 12 \)[/tex], [tex]\( \frac{n}{6} \)[/tex] equals [tex]\( 2 \).[/tex]

PLEASE HELP ANSWER WITH ALL STEPS PLS

NUMBER 3 WILL BE A PICTURE

QUESTION 4

Solve for n.
–2.34n = –12.168



n = 5.2

n = 9.828

n = –5.2

n = –9.828


QUESTION 5


Use a transformation to solve the equation.


–8c = 56



c = –48

c = 7

c = –7

c = 48

Answers

Hello.

Question 4:

-2.34n = -12.168
Divide both sides by -2.34;

n = 5.2 is your answer to #4 (Answer choice "C.)"

For Question 5:

-8c = 56
Divide both sides by -8 to solve for c;

c = -7 (remember your signs!) is your answer for #5 (Answer choice "C.)"

[tex] \frac{n}{-12.168} [/tex] = -2; To solve for this, we need to multiply both sides by -12.168 to isolate and solve for our variable.

[tex] \frac{n}{-12.168} [/tex] = -2; Multiply by -12.168

n = 24.336 (A negative multiplied by a negative results in a positive product.);

Your answer for #3 is n = 24.336 (Answer choice "B.)")

I hope this helps!
Answers: 
3.) n = 24.336 

4.) n = 5.2 

5.) c = – 7 

Explanations: 

If 3 onions weigh 0.75 lb,how much do 10 onions weigh

Answers

Use a proportion:

.75 / 3 = x /10

Solve for x

So if you do, 0.75 × 9 =6.75
Then, 0.75 ÷ 3 =0.25
Lastly, 6.75 + 0.25 = 7
Your final answer is 7.

A stamp collector bought 160 stamps for $25.00. The purchase included 5¢ stamps, 15¢ stamps, and 25¢ stamps. The number of 15¢ stamps is three times the number of 5¢ stamps. How many of each type of stamp was purchased?

Answers

5- 30
15- 90
52- 40
Questions?
Final answer:

The stamp collector purchased 40 5¢ stamps, 120 15¢ stamps, and 0 25¢ stamps.

Explanation:

To solve this problem, let's assign variables to the number of each type of stamp purchased. Let x be the number of 5¢ stamps, y be the number of 15¢ stamps, and z be the number of 25¢ stamps. We are given that the number of 15¢ stamps is three times the number of 5¢ stamps, so we can write this as y = 3x. We also know that the total number of stamps is 160, so we have the equation x + y + z = 160.

Using these equations, we can set up a system of equations:

y = 3x

x + y + z = 160

We can substitute the first equation into the second equation to eliminate y:

x + 3x + z = 160

Combining like terms, we get 4x + z = 160. We can rearrange the equation to solve for z:

z = 160 - 4x

Now we can substitute this expression for z back into the second equation:

x + 3x + 160 - 4x = 160

Simplifying, we get 4x = 0. Solving for x, we find x = 40. Plugging this value back into the equation y = 3x, we get y = 120. Finally, we can find z by substituting x and y into the equation z = 160 - 4x:

z = 160 - 4(40) = 160 - 160 = 0.

So, 40 5¢ stamps, 120 15¢ stamps, and 0 25¢ stamps were purchased.

Learn more about Stamps here:

https://brainly.com/question/22056874

#SPJ12

Find the measure of angel b

Answers

52+88+x=180
140+x=180
x=40

Advantage Airlines has a set fee for each checked bag, plus an additional charge for each pound the bag weighs. The cost is a linear fund of the weight?

What is the rate of change of this function?

Answers

Change in cost = 40 - 25 = 15 dollars

Change in weight = 50 - 20 = 30 pounds

Divide the two results to get 15/30 = 0.5

The rate of change is 0.5 dollars per pound meaning that each time you add a pound, the cost goes up by $0.50 (50 cents)

The rate of change of this function is 0.50.

Rates

Since Advantage Airlines has a set fee for each checked bag, plus an additional charge for each pound the bag weighs, to determine what is the rate of change of this function, knowing that 20 lbs cost $25 and 50 lbs cost $40, you must perform the following calculation:

25 / 20 = X1.25 = X40 / 50 = X0.8 = X1.25 - 0.8 = 0.45

Therefore, the rate of change of this function is 0.50.

Learn more about rates in https://brainly.com/question/25565101

Which number has a 5 whose value is 10 times the value as the 5 in 24092.52


A.3,498.05
B.65
C.4835.19
D.859.24

Answers

C. 4835.19

24092.52's 5 is in the tenths, which means the 5 has to be in the one's place inside your answer

hope this helps
The answer is C. There ya go
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