Mathematics Middle School

solve for z: -21 = z - (-6 - 2z)

Answers

Answer 1

Answer:

z = -9

General Formulas and Concepts:

Pre-Algebra

Order of Operations: BPEMDAS

Brackets Parenthesis Exponents Multiplication Division Addition Subtraction Left to Right

Equality Properties

Algebra I

Terms/Coefficients/Degrees

Step-by-step explanation:

Step 1: Define

-21 = z - (-6 - 2z)

Step 2: Solve for z

Distribute negative:                      -21 = z + 6 + 2zCombine like terms:                     -21 = 3z + 6Isolate z term:                               -27 = 3zIsolate z:                                        -9 = zRewrite:                                         z = -9
Answer 2

Answer:

Step-by-step explanation

-21-6=2z+z

Or,-27=3z

Or,z=-9

Related Questions

someone plz help im giving out brainliest ;)

Answers

Answer: the slope means the triangle have a side length of 3 and the slope means that the equilateral triangle have a perimeter of 0.

Step-by-step explanation:

Hope this helps ;)

At Breakfast Break, 2 eggs and 1 sausage patty cost $2.23 and 3 eggs with 2 sausage patties cost $3.76. Assuming that these amounts only pay for the eggs and sausage, how much does one sausage patty cost?

Answers

I am thinking one sausage patty cost $4.25

Cost of one sausage patty is $0.83.

What is an equation?

An equation is a combination of different variables, in which two mathematical expressions are equal to each other.

Given that,

Cost of 2 eggs and 1 sausage patty = $2.23,

Cost of 3 eggs and 2 sausage patties = $3.76.

Write above expression in equation form,

2 eggs + 1 patty = 2.23             (1)

3 eggs + 2 patties = 3.76         (2)

To find the cost of patty, multiply equation (1) with 3 and equation (2) with 2,

6 eggs + 3 patties = 6.69         (3)

6 eggs + 4 patties = 7.52          (4)

By solving equation (3) and (4)

1 patty = 0.83

The cost of 1 sausage patty is $0.83.

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Solve the equations:
1. 9x - 5 = 5x + 7
2. 8x - 2 = x - 16
3. 8x + 5 = 2x + 23
4. 2x + 8 = 5x + 20
5. 5(2x + 6) = 3x - 5

Answers

Answer:

5(x – 4) + 3x – 9x = 6 – (2x + 5) + 8x

step1:-   5x - 20 + 3x - 9x = 6 - 2x - 5 + 8x

step2:- 5x + 3x - 9x - 20 = 8x - 2x + 6 - 5

-x - 20 = 6x + 1

stp 3

-20 = 7x + 1

step 4

-21 = 7x

divide both sides by 7:-

-3 = x

thats the solution   x  = -3

Answer:

1. X=3, 2. X= -2, 3. X=3, 4. X= -4

What is the equation of this line in standard form?


A. 6x−7y=17


B.11x−6y=13


C.6x−11y=13


D.6x−11y=−13

Answers

Answer:

A. 6x- 7y= 17

Step-by-step explanation:

It is A. 6x- 7y=17









Hope this helps

pleasee help ill give brainliest

Answers

B or Always increasing

please help ill give brainliest

Answers

it’s positive 3 i think because when you put those answers of the equal sign they change, and because both of the answer are the same you will have the same final answer hope that makes sense lol

Answer:

The answer is -5

Step-by-step explanation:

15 divided by -3 is -5

positive number divided by a negative number is a negative number :)

hope this helps

How much does 22/7 differ from the true value of π?

Answers

Answer:

yess brooooooooo9o9oo

Answer:

0.001267

Step-by-step explanation:

If one knows that π is approximately 3.14159, then it trivially follows that π < 227, which is approximately 3.142857. so they differ by 0.001267

i will give brainlest to the first person to answer this question:
While at the grocery store, Mrs. Martin noticed that there were two different sized bottles of hot sauce, one was 16.9 ounces and the other 32.55 ounces. What is the difference in weight of the two bottles of hot sauce?

Answers

Answer:

15.65 ounces

Step-by-step explanation:

You have to subtract 16.9 from 32.55. This gives you 15.65 ounces.

Answer:

15.65 ounces

Step-by-step explanation:

I hope it's right :)

Ms. Gartland bought x number of shirts for the new members of her chorus. The cost for x number of shirts, including $3.99 shipping, was $77.49. Each shirt cost $12.25. There was no sales tax on this purchase. Which equation could be used to find x?

Answers

Answer:

The answer is 6 shirts

Step-by-step explanation:

Answer:

4

Step-by-step explanation:

Last year there were 205 ducks living on the pond. This year there are 20% more ducks living on the pond. How many ducks are living on the pond this year? *

Answers

It is is 246 ducks because 20% of 205 is 41 then you add the 41 which gives you 246

Joshua borrows $300 from his older sister to buy a bike. He promises to pay the total amount plus 5% simple interest in one year. How much will Joshua

Answers

the answer is $315. hope this helps !
$315 is your answer to the question

What is one constant of proportionality for this situation? *

Answers

Answer:

The constant of proportionality is the ratio between two directly proportional quantities. In our tomato example, that ratio is $3.00/2, which equals $1.50. Two quantities are directly proportional when they increase and decrease at the same rate.

Step-by-step explanation:

By how much did the price of the stock change from the beginning of Week 1 to the end of Week 4?

Answers

Answer:

It changed by 1.2

Step-by-step explanation:

1.5 divided by 1.25 equals 1.2

1.25 times 1.2 equals 1.5

Hope I helped!! :)

Sorry if it's wrong! :(

Pls mark brainlist!!!

Answer:

um you add then you i dont   know to  how to explain this

Step-by-step explanation:

Please help with math

Answers

Answer:

Ok here are the answers:

6: B

7: B

8: C

9: D

10: A

Have a good day! :)

Answer:

Step-by-step explanation:

6 is B (second)

7 is B (second)

8 is C (third)

9 is D (last)

10 is A (first one)

Graph -3.5 and -1.5 on the number line.

Answers

Answer:

ok i kow this hold on

Step-by-step explanation:

Which of the following numbers is written in scientific notation?
A. 17
B. 17 × 106
C. 3.734 × 10–14
D. 3.734

Answers

Answer:

i think is b

Step-by-step explanation:

Need some help here please

Answers

I think the d is the right answer

Help, im timed :(((
will mark branliest

Answers

Answer: it is D)

Step-by-step explanation:

alan is converting large and small numbers from standard notation to scientific notation. group the numbers according to their powers of 10

Answers

Answer:

i am kind of confused by the question but i would say to but all the numbers below 1 in the 10^-4 section and the numbers above 1 in the 10^6.

i might be wrong i don't what the question is really.

Step-by-step explanation:

Alan is converting large and small numbers from standard notation to scientific notation

10⁶  = 4.03 x 10⁶, 2.93 x  10⁶, 5 x  10⁶

10⁻⁴ = 1.2x 10⁻⁴, 6 x 10⁻⁴,  5.9 x 10⁻⁴

What is the scientific notation of a number?

The standard form for a number is a method by which we write number in a format like b×10ˣ. The value of b should be in between 0 to 10.

Given that,

The numbers,

0.00012, 4030000, 2930000, 0.0006, 5000000, 0.00059

Taking number, 0.00012

To convert it into scientific notation,

It should be in from of  b×10ˣ,

So, now dividing and multiplying 10000 into the number 0.00012,

⇒  0.00012 x (10000/10000)

⇒  (0.00012 x 10000)/10000

⇒   1.2/10000

⇒   1.2x 10⁻⁴

Similarly,

0.0006 can be written as 6 x 10⁻⁴

And  0.00059 can be written as 5.9 x 10⁻⁴

Now taking number, 4030000

To convert it into scientific notation,

It should be in from of  b×10ˣ,

So, now dividing and multiplying 1000000 into the number 4030000,

⇒ 4030000 x (1000000/1000000)

⇒  (4030000 / 1000000) x 1000000

⇒   4.03  x 1000000

⇒   4.03 x 10⁶

Similarly,

2930000 can be written as 2.93 x  10⁶

And 5000000 can be written as 5 x  10⁶

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An animal shelter has a ratio of cats to dogs that is 9:7. What fraction of these animals are dogs?

Answers

Answer:

For the answer I would say 7, the fraction of dogs is 7/7

Dog=7
Hope it’s the right answer

ASAP PLS ANSWER I DEAD

Answers

Answer:

Variables: you are correct

Coefficients: -2

Constant: 3/7

Step-by-step explanation:

Variables are letters used in math so you were correct.

Coefficients are numbers with a variable. So to find the coefficient you would look for a number "connected" to a variable. This would be -2 because it is being subtracted from the first term.

The constant is 3/7 because you could put it on a number line.

please help 50 points


Alicia rented bowling shoes for $3 and played 4 games at $2 each. Write and
evaluate an expression for the total cost of bowling.

Answers

3+4=(2) = 3+8 = $11

Which of these shapes have the same area? Plz help thx

Answers

Answer:

I think it's b and a

Step-by-step explanation:

hope it helps u ?


A right triangle has a hypotenuse of length 13 in. and a leg with length 4 in. What is the length of the other leg?

Answers

Answer:

Solution,

Let the hypotenuse of the right triangle be 'a' and its legs be 'b' and 'c'.

Here, a= 13, b = 4 and c=?

Using Pythagoras or Gogou theorem,

a² = b² +c²

or, 13² = 4² +c²

or, c² =153

or, c = 3√17 inch

One stamp is randomly selected from a 10-by-10 sheet of 100 stamps. What is the probability that the stamp selected is not along an outer edge? Express your answer as a common fraction. Plz answer as soon as possible... thx!

Answers

Ten plus eight teen plus eight
Thirty six

Ten times ten
One hundred

One hundred minus thirty six
Sixty four

1/64 is the fraction and the answer

The required probability of not stamp not along an outer edge is 8/25.

What is a fraction?

A fraction is a numeral that represents a rational number.

Let a and b be two numbers, then their fraction can be represented as a/b.

Given that,

Total numbers of stamp in a stamp sheet of 10 by 10 = 100,

On one edge there would be 10 stamps but on each diagonal there will be 1 stamp common,

Therefore, total number of stamps  on outer edge will be = 9 x 4 = 36

Remaining stamps = 100 - 36 = 64

The fraction value of 64 out of 100 = 64 / 100 = 8 / 25

The required fraction value of stamps is 8 / 25.

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An airplane 30,000 feet above the ground begins descending at a rate of 2,000 feet per minute. Write an equation to model the situation.

What are the slope and Y-intercept?

Answers

Answer:

7

Step-by-step explanation:

Answer:

Slope: -2000

Y-intercept: 30000

Equation: Y=-2,000x+30,000

Step-by-step explanation:

The pane starts at 30,000 feet, giving up an y intercept or a starting point. Since the plan is descending, you know the slop will be negative.

what is the slope of the line passing through the point(2,-1) and the origin.
This is the whole question, no picture came with it.

Answers

Answer:

- 1/2

Step-by-step explanation:

(0,0) (2,-1)

m = difference of y/difference of x = (-1 - 0) / (2 - 0) = - 1/2

y = - 1/2 x

Which equation is an example of slope-intercept form of a line?

Answers

Slope intercept form is y=mx+b

The answer is option B.

A rectangular prism is shown below. What is the lateral surface area?

Answers

Answer:

the answer is 110 because 5 times 2 equals 10 and 10 times 11 is 110

Answer:

2(11)(5)+2(11)(2)+2(2)(5)=110+44+20=174

174 Square Centimetres

what is the nearest whole percent of 45

Answers

Answer:

Step-by-step explanation: 45% based on the way you state the question. 45% is a whole percent.

45 percent is the nearest whole percent
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