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

Question 7!!!

Total area= area of parallelogram + area of trapezoid

Answers

The total area of the figure is 52 square feet by adding the areas of the parallelogram and trapezoid

Calculating the total area

from the question, we have the following parameters that can be used in our computation:

parallelogram and trapezoid

Wher we have

Area of parallelogram = 7 * (6 - 2)

Area of parallelogram = 28

Also, we have

Area of trapezoid = 1/2 * (7 + 5) * 4

Area of trapezoid = 24

So, we have

total area = 28 + 24

total area = 52

Hence, the total area is 52 square feet

Answers

Answer:581.39

Step-by-step explanation:

The answer is 850 dollars

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

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 :)

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

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

I NEED A GOOD GRADE SO I CAN BE A STEPPER NEXT YEAR !!!!!

Answers

The correct answer is 5

Answer: It's 7

Step-by-step explanation: Since all the sides are the same and it says JK is 7 inches HL must also be 7 inches.

Hope It helped!

Harper bought 9 toys for her puppy, Peanut. The toys cost:
$9.00 $6.00 $9.00 $9.00 $6.00 $5.00 $6.00 $5.00 $3.00
What was the median price of the toys?

Answers

Answer:

$6.00

Step-by-step explanation:

As we know that the median is the middle value of a data set. When we list these costs in order:

3,5,5,6,6,6,9,9,9

When crossing out the values on each side we can see that the middle value lands on 6 so the median is $6.00

Hope it helps!

$6.00
Step-by-step explanation:
As we know that the median is the middle value of a data set. When we list these costs in order:
3,5,5,6,6,6,9,9,9
When crossing out the values on each side we can see that the middle value lands on 6
so the median is $6.00

I dont need an answer I just need help.. The picture below, is it just 9x9 and like 6x6 or is it 9x2 and 6x2? And then the answer would be c x 2 or c x c?

Answers

Answer: 45

Step-by-step explanation:

Pythagorean Theorem is a^2+b^2=c^2
In this case it would be 9^2-6^2 which is 45

Answer:

In this case, it would be 9x9 and 6x6

Step-by-step explanation:

The ² in the problem means to multiply the number by itself, like 9x9. It's called the square.

a² + b² = c²

eg.

(a x a) + (b x b) must be = (c x c)

c = hypotenuse which means it is the longest part, which is why it is a² + b² = c²

The person's answer before me is also right

Hope this helps! :)

Joseph has a fair dice with 4 faces numbered 1 to 4.
He also has a fair dice with 6 faces numbered 1 to 6.
He rolls both dice.
Find the probability of rolling a different number on each dice.

Answers

Answer:

To find the probability of rolling a different number on each dice, we can determine the total number of possible outcomes and the favorable outcomes.

The total number of possible outcomes when rolling a 4-sided die and a 6-sided die is the product of the number of sides on each die: 4 × 6 = 24.

The favorable outcomes occur when we roll a different number on each die. We can calculate this by considering all the possible combinations.

For the first die (4-sided), there are 4 possible outcomes.

For the second die (6-sided), there are 6 possible outcomes.

Since we want different numbers on each die, the total number of favorable outcomes is 4 × 6 = 24.

Therefore, the probability of rolling a different number on each die is:

Probability = (Number of favorable outcomes) / (Number of total outcomes)

Probability = 24 / 24

Probability = 1

Hence, the probability is 1 or 100%.

I AM STILL CONFUSED PLEASE HELP ME BOO

Answers

Answer: Your answer is C) 144°

Step-by-step explanation: All the sides of a rectangular decagon are the same so since ∠D is 144° ∠A is 144°

Have a nice day!

Answer:

C(144

Step-by-step explanation:

Find the area of the composite figure.

A. 82 squared ft
B. 61 squared ft
C. 40 squared ft
D. 49 squared ft

Answers

Area of rectangle

Length*Breadth10*440ft²

Area of triangle

1/2*Base*Height1/2*7*63*721ft²

Total area

21+4061ft²

Option B

option B

I took the test

0.75(s+13)=
Please help!

Answers

Answer:0.75x+9.75

Step-by-step explanation:

First, you will have to distribute (multiply) the 0.75 to both the s and 13 inside the parenthesis which would get you 0.75x+9.75

0.75s+12.25=0
0.75s=-12.25
s=-16.33

HELP PLS 25 PTS GIVE EXPLANATION ON ANSWER PLS
A 25-foot magazine rack begins 20 feet south of the checkout desk and continues south. What are the coordinates of the beginning and end of the magazine rack? Explain or show how you got your answer. ANSWER CORRECTLY WITH AN EXPLANATION

Answers

Answer: The coordinates of the beginning of the magazine rack are (0,-20), and the coordinates of the end of the magazine rack are (0,-45).

Explanation:

The magazine rack begins 20 feet south of the checkout desk, so its starting point is 20 feet below the x-axis. This gives us the coordinates (0,-20) for the beginning of the rack. Since the rack is 25 feet long, it extends 25 feet to the south of its starting point. Therefore, the endpoint of the rack is 20 feet (the starting point) minus 25 feet (the length of the rack), or -5 feet south of the checkout desk. This gives us the coordinates (0,-45) for the end of the rack.

Brainliest?

The given information tells us that the magazine rack begins 20 feet south of the checkout desk and continues south for a length of 25 feet. Since the magazine rack is only moving in the south direction, we can say that the x-coordinate (horizontal distance) of both points will be the same.

Let's assign the x-coordinate of the checkout desk as 0. Then, the x-coordinate of the beginning and end of the magazine rack will also be 0.

The y-coordinate of the beginning of the magazine rack is 20 feet south of the checkout desk, which means it is 20 feet less than the y-coordinate of the checkout desk. If we assume that the y-coordinate of the checkout desk is y = 0, then the y-coordinate of the beginning of the magazine rack is y = -20.

To find the y-coordinate of the end of the magazine rack, we add the length of the rack (25 feet) to the y-coordinate of the beginning of the rack (-20 feet). This gives us y = 5.

Therefore, the coordinates of the beginning of the magazine rack are (0,-20) and the coordinates of the end of the magazine rack are (0,5).

Can someone answer this question for me? asap please

Answers

Answer:

a) If the volume of the prism on the left is 1029 m³, then the volume of the prism on the right is 1536 m³.

b) If the height of the prism to the left is 14 m, the height of the prism to the right will be 16 m.

c) If the surface area of the prism to the left is 392 m², the surface area of the prism to the right will be 512 m².

Step-by-step explanation:

a) To solve, set up a proportion. Volume is three-dimensional, so we need to cube.

(7/8)³=1029/x

Now we can solve using cross products to get 1536.

If the volume of the prism on the left is 1029 m³, then the volume of the prism on the right is 1536 m³.

b) To solve the second one, we also set up a proportion. Height is one-dimensional, so we will not need exponents here.

7/8=14/x

Solve using cross products to get 16.

If the height of the prism to the left is 14 m, the height of the prism to the right will be 16 m.

c) Now we are solving for area, which is two-dimensional. Therefore, we will need to square.

7/8²=392/x

Solve using cross products to get 512.

If the surface area of the prism to the left is 392 m², the surface area of the prism to the right will be 512 m².

Hope this helps and good luck on your homework! For additional resources, check out The Maths Prof: Similarity parts 1-3.

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

Please help ASAP will give brainlest and special thanks

Answers

Answer:67cm

Step-by-step explanation:

Please help me out on this one NEEDED IN 30-40 MINS

Answers

Answer:

Sales tax is $2.70.

Hope this helps

the sales tax is $2.70

what number can be subtracted from 11 get to 3

Answers

Answer:

Step-by-step explanation:

11 - 8 = 3

Was there anything more to this question?

8

A bit too simple for middle school level

What is the range?
89 86 93 86 85 87

Answers

I think the range is the difference between the largest number and the smallest number.
So 93-85= 8

Answer: 8 (i think)

(so sorry if i’m wrong!!)

To find range you need to subtract the largest value from the smallest value. 93-85 is 8

Can someone help please I'm in a hurry

Answers

you can make 48 batches of cupcakes

the best answer is 48 cookies

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

theta is a right angled triangle tan theta= 23/52 work out the value of theta give your answer to 1 decimal place

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

Please Help me! I am clueless

Answers

Firstly, you have to find the area of the whole shape. After that, you subtract that from the area of the individual triangle to get your answer.

The whole shape is a rectangle, with a length of 6 and a width of 7.
To find the area, multiply 6 by 7=42yd^2

The area of the entire shape is 42yd^2

Now, the vertical 4yd side plus the height of the dotted triangle will equal 6yd.
So the height of the dotted triangle is 6-4=2yd.

The horizontal 4yd side plus the base of the dotted triangle will equal 7yd.
So the base of the dotted triangle is 7-4=3yd.

Formula for area of triangle: 1/2 x base x height
1/2 x 4 x 3= 6yd^2

The area of the dotted triangle is 6yd^2

Now subtract the area of the whole shape by the area of the dotted triangle to get the shaded region.

42-6= 36yd^2

Area of shaded region: 36yd^2 (i think)

(so sorry if i’m wrong!!!)

39 yds squared
make into trapezoid and rectangle
rectangle 4*6=24
trapezoid (4+6/2)3=15
15+24=39

2 8/9 - 2/3 = 1 1/3. Correct any mistakes

Answers

Answer:

its 20/9

Step-by-step explanation:

2×9+8 /9=18+26/9

26/9-2/3=20/9

Answer:

2 2/9

Step-by-step explanation:

2/3= 6/9

2 8/9 = 26/9

26/9 - 6/9 = 20/9

20/9 simplified = 2 2/9

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!

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

Answers

= 480 cm^3

Equation: v1 + v2 = v3

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

= 128 + 128 + 224

= 480 cm^3

Answer:

480

Step-by-step explanation:

Brianna has a decision to make on where to attend college after high school. She has a choice of living at home and attending the local junior college or attending a four-year university. She created a table to help her and her parents make the decision. The table contains the estimated costs for each semester.

At Junior College At Four-Year University
Tuition and Fees $1,800 $2,625
Room and Board $0 $3000
Transportation Costs $1000 $0
Books and Supplies $700 $700
Personal Expenses $600 $600

How much would she save the first year by attending the local junior college?

Answers

Answer: I think it would be $2825

Step-by-step explanation:

Add all of the Junior College fees and then add all of the 4-year college fees and then subtract them to find your answer.

I think it would be 2825 btw sorry if I am wrong

There are 4 figures shown. The first figure has a 1 dot, the second has 3 dots, and the third figure has 6 dots, and finally, the fourth one has 10 dots.

If the following pattern continues, how many more dots are there in Figure 100 than in Figure 98?

(Offering 30points for this question for Math Olympiad! Thank you! <3)

Answers

Answer:

Figure100=5050dots Figure98=4851

Deanna is comparing the number of people per household in two neighborhoods. She takes a random sample of 20 households from each neighborhood and displays her results on the dot plots shown.

What is the degree of overlap for the dot plots?

Responses

High

Moderate

None

Answers

Answer:

what is the degree of overlap? if the answers are Responses, high, moderate, or none. the answer is moderate

Step-by-step explanation:

The degree of overlap for the dot plots, given the data is A. High.

What is a high degree of overlap ?

The dot plots for the two neighborhoods show a high degree of overlap, it would suggest that the distribution of the number of people per household in each neighborhood is similar.

This means that there is little difference between the two neighborhoods in terms of the average number of people per household. It is possible that the two neighborhoods have similar average household sizes but differ in other important ways, such as income, education level, or demographics.

Find out more on degree of overlap at https://brainly.com/question/12242330

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