Mathematics Middle School

What is 2x+21? Please it's due in about 15 minutes!!!

Answers

Answer 1

Answer:

The value of x is 21

Step-by-step explanation:

2x+21 is a linear equation with one unknown, x. To solve for x, we can use the following steps:

1. Subtract 21 from both sides of the equation. This will isolate x on the left-hand side of the equation.

```

2x+21 - 21 = x

```

2. Divide both sides of the equation by 2. This will divide both sides of the equation by 2, which will cancel out the 2 on the left-hand side of the equation, leaving x by itself.

```

x = (2x+21)/2

```

3. Simplify the right-hand side of the equation.

```

x = x/2 + 21/2

```

4. Combine like terms on the right-hand side of the equation.

```

x = (1/2)x + 21/2

```

5. Subtract (1/2)x from both sides of the equation. This will isolate x on the left-hand side of the equation.

```

x - (1/2)x = (1/2)x + 21/2 - (1/2)x

```

6. Simplify the right-hand side of the equation.

```

(1/2)x = 21/2

```

7. Multiply both sides of the equation by 2. This will multiply both sides of the equation by 2, which will cancel out the (1/2) on the left-hand side of the equation, leaving x by itself.

```

2*(1/2)x = 21/2 * 2

```

8. Simplify the right-hand side of the equation.

```

x = 21

```

Therefore, the value of x is 21.

Answer 2

2x+21
2x+21=0
-21/2
X = -21/2 or -10.5
Have a great day or night
Goodluck on your assignment:)))

Related Questions

PLS HELP ME DO THIS QUESTION PLSPLSPLS
QUESTION IS ON THE PIC BELOW

Answers

If the equation is 5(x+8). You would need to distribute. 5(x) + 5(8) is the extended form and to find it in the simplest form you simply do multiplication. Which would be 5x+40

The answer is 5x+40
It asked you to us the distributive property and if you were to distribute the 5 to the equation 5(x+8) you would do 5 times X which equals 5x then you would do 8 times 5 which is 40. Good luck with the rest!

Gabby took 8 vocabulary quizzes. Her scores were:
7 points 7 points 7 points 5 points 5 points 7 points 4 points 6 points
What was the mode of Gabby's quiz scores?

Answers

Answer:

Step-by-step explanation:

As we know Mode is the most frequent number in a set of data values:

As the number 7 appears 4 times more than any other number 7 is the answer.

Hope it helps!

The answer is 7 because it comes up the most

Shannon has run many marathons and keeps track of all her finishing times. At a race last month, she finished in 190 minutes. At her next race, she finished with a time that was 20% shorter. What was her finishing time at the most recent race?

Answers

Answer: 152 minutes

Step-by-step explanation:190(.20) = 38 minutes shorter. take 38 away from 190, we get 152 minutes

152. If you take 190(0.2) you get 38. Then subtract 38 from 190 and get 152

A company is going to make a storage container with sheet steel walls. The container will be in the shape of a rectangular prism, as shown below. If the sheet steel costs $25 for each square meter, how much will the sheet steel cost in total?

Answers

Answer:

Step-by-step explanation:

no picture

Since there’s no picture I can’t give an exact answer but, if each sq meter costs $25, multiply the (number of sq meters x 25) and you’ll have your answer! Hope this helps :)

Im offering 10 points

Answers

Answer:

138

I hope i was able to help u,if i was ,please mark me brainliest pls

Answer:

138. Steps are shown above.

Hey! YOU! STOOOP! HELP ME ITS EASY BUT IM FOOLISH!

What is the difference between factors of a number and multiples of a number?
Use the number 25 as an example.

Answers

Answer:

Factors are like numbers that are multiplied together to get that number

Using 25:

The factors of 25 are 1,5,25

1*25 = 25 and 5*5 = 25, so they are the factors of 25

Multiples are the products of the specified number and another number

Using 25:

Some of the multiples of 25 are 25, 50, 75, 100 and so on

25*1 = 25, 25*2 = 50, 25*3 = 75, 25*4 = 100, so they are the multiples of 25

Hope this helps!

Answer the questions below.

(a)
The perimeter of the rectangular garden is 330 m.

If the width of the garden is 77 m, what is its length?

Length of the garden: [] m.

(b)
The area of a rectangular window is 6734 cm².

If the length of the window id 91 cm, what is its width?

Width of the window [] cm.

Answers

Answers:
(A):88
(B):74

Explanation:

For (A), first multiply 77 by 2 then subtract from 330

77x2=154

330-154=176

For (A), second divide 176 by 2

176/2=88

Length=88

For (B), divide 6734 by 91

6734/91=74

Hope this helps!

Answer:

(a) 88 m

(b) 74 cm

Step-by-step explanation:

You want the length of a garden with a perimeter of 330 m and a width of 77 m, and you want the width of a window with an area of 6734 cm² and a length of 91 cm.

(a) Perimeter

The perimeter of a rectangle is given by the formula ...

P = 2(L +W)

Filling in the given values, we can find the unknown.

330 = 2(L +77)

165 = L +77 . . . . . . . divide by 2

165 -77 = 88 = L

The length of the garden is 88 meters.

(b) Area

The area of a rectangle is given by the formula ...

A = LW

Filling in the given values, we can find the unknown.

6734 = 91W

6734/91 = 74 = W

The width of the window is 74 cm.

<95141404393>

help me Please asap in inserted the picture NUMBER 6 BTW

Answers

Answer:

The length is 192ft

Step-by-step explanation:

To find the length you have to find the scale used to draw the image which would be the width given divided by the width in yards then multiply the given length by the scale to get the length in yards.

Hope this helps :)

the length is 192 feet

Of 100 students surveyed, 42 own a dog, 34 own a cat, 15 own a dog and cat, and 9 own neither a dog nor a cat. Based upon the results, how many of the next 20 students surveyed would you expect to own a dog and cat. Record your answer and fill in the bubbles on your answer document. Be sure to use the correct place value.
PLEASE HELP!!!!

Answers

Answer: 3

Step-by-step explanation: 15% of the people surveyed had both a cat and a dog, so you would find 15% of 20. Find 15% of 20 by doing 20 x .15

Your answer is 3 students

!!!!!ATTENTION!!!!! PLS helps (50 POINTS)

Answers

Answer:

Step-by-step explanation:

Answer:

38.13 inch² (Approximately)

Step-by-step explanation:

The following figure has a Semicircle and a Rectangle.

The length of the Rectangle = 6 inches

The breadth of the Rectangle = 4 inches

Area of a Rectangle = Length * Breadth

= 6 * 4

= 24 inch²

Diameter of the Semicircle = 6 inches

Radius of the Semicircle = Diameter/2

= 6/2

= 3 inches

Area of a Semicircle = πr²/2

= 3.14 * 3²/2

= 3.14 * 3 * 3/2

= 3.14 * 9/2

= 1.57 * 9

= 14.13 inch² (Approximately)

Total area of the figure = Area of the rectangle + Area of the Semicircle

= 24 + 14.13

= 38.13 inch² (Approximately)

Hope my answer helps you.

Please mark my answer as the BRAINLIEST. Plssssssssssssssssssss

Please help me I'm stressed and this is due tomorrow...:((

Answers

Answer:

Step-by-step explanation:

The line starts at 24 and ends with 34. The box starts at 25 and 32. The line in the middle shows 31.

option A since the line in the middle is at 31 and it starts at 24 and ends at 34

The base of this regular right pyramid is a square. What is its surface area? A. B. C. D. .

Answers

Answer: Your answer is 21 ft^2

Hope it helped!

^ ‿ ^

Answer is 21 ft^2 okay Soo try that

......................................

Answers

= 480 cm^3

Equation: v1 + v2 = v3

= (4x4x8) + (4x4x8) + (14x4x4)

= 128 + 128 + 224

= 480 cm^3

Answer:

480

Step-by-step explanation:

Help me solve question 2; both parts.

Answers

reflect d,e,f over x axis and translate up 5

I think It could be 5

Please solve this, Im offering 10 points

Answers

The answer is 4

Explanation- i just know

Answer:

Use the 'Keep, Change, Flip/Reciprocal' (KCF) method.

• 6/3 × 4/2

Then, multiply both numerators together and both denominators together.

• 24/6

Simplified: 4

Odessa and Randall play a game in which the highest score wins. They record their scores and plot them on the dot plots, as shown.

Based on the data, which statement about Odessa's and Randall's scores is true?

A. Odessa is generally worse at the game than Randall because her median score is lower than Randall's median score.

B. Odessa is less consistent at the game than Randall because the variability of her scores is greater than the variability of Randall's scores.

C. Randall is generally better at the game than Odessa because his median score is higher than Odessa's median score.

D. Randall is more consistent at the game than Odessa because the variability of his scores is greater than the variability of Odessa's scores.

(I got confused on the answers because of some of the repeating words)

Answers

Answer: B. Odessa is less consistent at the game than Randall because the variability of her scores is greater than the variability of Randall's scores.

Step-by-step explanation: I summed up all of Randall's scores and got 410 and then I summed up all of Odessa's scores and got 660 so that means that Odessa's scores are bigger than Randall's scores.

The data on the dot plot shows that the B. Odessa is less consistent at the game than Randall because the variability of her scores is greater than the variability of Randall's scores.

What do the dot plots show ?

Odessa's scores are more spread out and less consistent than Randall's scores. This could be due to a number of reasons, such as differences in skill level, luck, or consistency in performance.

Overall, a greater degree of variability in Odessa's scores compared to Randall's scores suggests that Odessa's performance in the game is less predictable and consistent than Randall's performance.

Find out more on dot plots at https://brainly.com/question/25957672

#SPJ1

Hi hi
need help with this work asap

Answers

Answer:Top question:Table =0.8
Constant of proportionality is 1.25?

a)The speed they are going at?
b)187.5(units which are being used)
c)0.4 hours=24 minutes

Step-by-step explanation:

a)The formula is distance=speed x time. Speed is only one missing
b)Substitute into the formula 75 x 2.5=187.5
c) Re-arrange the formula so it becomes time = distance/speed
Substitute into it so it become time=30/75
=0.4
=24 minutes

I think...

Answer:

Step-by-step explanation:

Answers

Answer:

θ = 23.9°

Step-by-step explanation:

tan θ = 23/52

θ = arc tan (23/52)

=23.86°

= 23.9° to one decimal place

Elena has a budget of $50 for a new watch. she finds two watches that are $8 above and $8 below her budget, respectively.

Part A
write an absolute value equation that can be used to find the prices of the wayches elena finds
0=|x+___|+___

Part B
What are the prices of the watchee Elena finds?
$______and$______

Answers

X+8 & X-8

The first watch is 58 and the other watch is 42

The requreid, The absolute value equation to represent this situation is 0 = |x - 50| + 8 and Elena finds a watch that costs $50. The other two watches are priced at $42 and $58.

What are functions?

Functions are the relationship between sets of values. e g y=f(x), for every value of x there is its exists in a set of y. x is the independent variable while Y is the dependent variable.

Part A:

Let x be the price of the first watch she finds. Then the price of the second watch is x - 16 (since it is $8 below her budget).

The absolute value equation to represent this situation is:

0 = |x - 50| + 8

Part B:

To solve the absolute value equation, we need to consider two cases:

Case 1: x - 50 is positive

If x - 50 is positive, then we can write the equation as:

0 = x - 50

x = 50

This means that the watch Elena finds costs $50, which is exactly her budget.

Case 2: x - 50 is negative

If x - 50 is negative, then we can write the equation as:

0 = -(x - 50)

0 = -x + 50

x = 50

Again, this means that the watch Elena finds costs $50.

So, Elena finds a watch that costs $50. The other two watches are priced at $42 and $58.

Learn more about function here:

brainly.com/question/21145944

#SPJ2

PLS QUICK

Nathan is using the random number string below in a simulation. He wants to determine how many people he has to meet before he finds one that is left-handed.

1 5 8 9 7 8 2 3 6 7 0 5 6 5 9 3 7 0 9 4

He lets each number in the string represent a person, with 0 representing left-handed people and 1 through 9 representing right-handed people. According to the simulation, how many people does he have to meet until he finds the first left-handed person?

Answers

Answer:11people

Step-by-step explanation:

Answer: 11 people.

For this question, ignore all numbers that are not 0 to start with, as 0 is the only number that shows you an individual who is left-handed. Now, take a look at where 0 is. How many numbers do you see before it? There are 10 numbers before 0, and if you add 1 more, there are 11 in total. The first left-handed person is the 11th person Nathan will meet.

help meeeeee please :DDDD

Answers

Don't worry Im here to help! All you have to do is 12 divided by 200 then go to the bathroom and wash your hands and then tell your teacher that they are bad and then you should get the answer of -14. I hope this helps!

Answer: 34 1/2 ounces

Step by step:

So each bag weighs 2 7/8 ounces and there are 12 bags you would do (12 x 2 7/8) 12 times 2 7/8 to get the answer of 34 1/2 ounces in all.

Use the table to determine the relationship between yards and feet.

Yards Feet
1 3
2 ?
3 ?
4 ?

Which of the following graphs matches the relationship shown in the table?
A. Y
B. Z
C. W
D. X

Answers

Answer: Y

Step-by-step explanation:

Remember: 1 yard = 3 feet. Consider this for all the choices!!

W starts at (0, 1) making it automatically incorrect as 0 yards cannot equal a foot, it equals zero feet.

X has a point marked (1, 0) making it automatically incorrect as 1 yard does not equal to 0 feet.

Z starts with the point (0, 3) making it automatically incorrect as 0 yards cannot equal 3 feet,

Y does not have any incorrect points, and properly illustrates that 1 yard is equal to 3 feet with the points provided, Y is correct

Graph Y is correct, There are 3 feet in one yard

Im offering 10 points

Answers

Answer:

Mean:39

Median:32.5

Range:62

Step-by-step explanation:

Again,brainliest pls

i need it lol

Answer:

The answers are:

Mean = 39

Median = 32.5

Range = 62

Step-by-step explanation:

If you have any questions please ask me! :)

2/7+(-3/4) + (-2/7)+4/3 please show all work! Thank you so much!

Answers

To add these fractions, we need to find a common denominator. The least common multiple of 7, 4, and 3 is 84, so we will use 84 as the common denominator.

2/7 + (-3/4) + (-2/7) + 4/3

= (2/7) * (12/12) + (-3/4) * (21/21) + (-2/7) * (12/12) + (4/3) * (28/28) (multiplying each fraction by an equivalent form to get a common denominator of 84)

= 24/84 - 63/84 - 24/84 + 112/84 (simplifying each fraction)

= -51/84 + 112/84 (combining like terms)

= 61/84 (simplifying the resulting fraction)

Therefore, 2/7 + (-3/4) + (-2/7) + 4/3 = 61/84.

Answer:

7/12

Step-by-step explanation:

2/7 + (-3/4) + (-2/7) + 4/3

2/7 - 3/4 - 2/7 + 4/3 (+ * - = -)

2/7 - 2/7 - 3/4 + 4/3 (Distribution Property)

0 - 3/4 + 4/3

- 3/4 + 4/3

4/3 - 3/4 (Distribution Property)

LCM = 3 * 4

= 12

(16 - 9) / 12

7/12

So, the final answer is 7/12.

Hope my answer helps you ✌️

Mark BRANLIEST

how do i simplify an improper fraction

Answers

So if the improper fraction is 11/3 you’d say 11 goes into 3 3 times so then it’d be 2 left over. So with that it’d be
3 2/3

first identify the common factor then divide the numerator and the denominator by the same factor

The table shown below shows 4 different sized boxes of markers and the current price of each. The third column shows any current sales. Based on the price per marker, which box of markers is the best deal?

a. Box of 8 markers
b. Box of 12 markers
c. Box of 24 markers
d. Box of 30 markers

Answers

Answer:

i think b or c because that is kinda hard

The answer is b!!!!!!!!

Find the perimeter and the area of the figure.
5 m
7 m
5m
11 m

Answers

Answer:

56 is the perimeter!!

Step-by-step explanation:

The answer is 56

Just add all sides

I need heelllppp! what is -4+25

Answers

Answer:

Step-by-step explanation:

The result of the expression -4 + 25 is 21.

the answer is 21

because -4+ 25 is equal to 25-4

how to check:-17=-3x-2

Answers

Answer: x=5

Step-by-step explanation:

To solve this equation, we have to get the x alone. To cancel out the -2 on the right side, you will add 2 to both sides of the equation since -2 and 2 cancels out. Now you have -15=-3x. Now you will divide by -3 on both sides since the -3 in the equation is being multiplied by x. -15 divided by -3 equals 5. Therefore x=5.

first, you start by subtracting the 3x from both sides to make the variable a positive. now the equation is 3x-17=-2. Now, you add 17 on both sides, making the equation 3x=15. Then, divide 15/3 and you get
x=5

For an experiment, Bea recorded how much each of 14 seedlings grew in one month. She made a line plot to show the data. Which value occurred most often?

Answers

The answer for this question is going to be 5.1 !! Hope u have a great day

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