Mathematics Middle School

Pls help will give brainlest.

Solve each equation.
Two step equations - integers

Q1. Solve 1 - 7b = -20

Q2. Solve -k - 5 = 0

Q3. Solve -1 + 8a = -129

Answers

Answer 1
Q1: b=3
Q2: k=-5
Q3 a=-16
Answer 2

The required answers by solving two-step equations are:

Q1. The solution of equation 1 - 7b = -20 is b = 3

Q2. The solution of equation -k - 5 =20 is k = -5

Q3. The solution of equation-1 + 8a = -129 is a = -16

Q1. Solve 1 - 7b = -20

To solve this equation, we will isolate the variable b by performing two steps.

Step 1: Subtract 1 from both sides of the equation:

1 - 1 - 7b = -20 - 1

-7b = -21

Step 2: Divide both sides of the equation by -7 to solve for b:

(-7b) / -7 = (-21) / -7

b = 3

Therefore, the solution to the equation 1 - 7b = -20 is b = 3.

Q2. Solve -k - 5 = 0

To solve this equation, we will isolate the variable k by performing two steps.

Step 1: Add 5 to both sides of the equation:

(-k) - 5 + 5 = 0 + 5

-k = 5

Step 2: Multiply both sides of the equation by -1 to solve for k:

(-k) * (-1) = 5 * (-1)

k = -5

Therefore, the solution to the equation -k - 5 = 0 is k = -5.

Q3. Solve -1 + 8a = -129

To solve this equation, we will isolate the variable a by performing two steps.

Step 1: Add 1 to both sides of the equation:

(-1) + 1 + 8a = -129 + 1

8a = -128

Step 2: Divide both sides of the equation by 8 to solve for a:

(8a) / 8 = (-128) / 8

a = -16

Therefore, the solution to the equation -1 + 8a = -129 is a = -16.

Therefore, the required answers by solving two-step equations are:

Q1. The solution of equation 1 - 7b = -20 is b = 3

Q2. The solution of equation -k - 5 =20 is k = -5

Q3. The solution of equation-1 + 8a = -129 is a = -16

Learn more about solving two-step equations.

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Related Questions

Which expression represents five less a third of a number? ​

Answers

Answer:

A

Step-by-step explanation:

Answer:

The first option is the answer

hope this helps

have a good day :)

Step-by-step explanation:

Describe the figure that is created with the points (-2, -3), (-2, 5), (1, -3) and (1, 5).
right triangle
rectangle
scalene triangle
square

Answers

It’s a rectangle. It goes 2 by 3

The figure created with the points (-2, -3), (-2, 5), (1, -3) and (1, 5) is a rectangle.

Which shape is a rectangle?

A rectangle is oblong. It has two pairs of parallel sides and four right angles. A rectangle can also be known as an equiangular quadrilateral. This is because a rectangle is a quadrilateral shape (4-sided shape) that has parallel sides, equal to one another, and all 4 corners have angles that are 90º.

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A Middle School takes a poll to find out what students want to eat at lunch. 70 students from 8th Grade are randomly chosen to answer the poll questions. Identify the population and sample?

Answers

Answer:

population: 8th grade

sample: 70

Population of middle school is 8th grade and sample is 70.

Here, 70 students from 8th grade are randomly chosen to answer the poll questions for find out what student want to eat at lunch.

What is population?

Population is known as a group of individuals, objects, events, organizations etc.

In middle school 70 students are chosen to answer the poll question.

So sample of middle school is 70 and population is 8th grade.

Learn more about the Population visit:

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plz help someone helpsssss

Answers

Answer:

MAD stands for mean absolute deviation so 79.4 is the mean.  The MAD should be zero 0  

Step-by-step explanation:

We find MAD by "Taking each number in the data set, subtract the mean, and take the absolute value. Then take the sum of the absolute values. Now compute the mean absolute deviation by dividing the sum above by the total number of values in the data set. Finally, round to the nearest tenth."-Ixl

So your Mean Absolute Deviation should be 0 zero.

Please mark as Brainliest

Hoped this helped

79.4 is the mean hope this helped

In an orchard, there are 17 apple trees, 28 orange trees, and a cherry tree. What is the ratio of apple trees to cherry trees?

Answers

Answer:

17:1

Step-by-step explanation:

there are 17apple trees n one cherry tree that's y it's 17:1 'a'means 1

17:1

It's literally so simple. You have 17 apple trees and one cherry tree. Did you even read the question?

I have given a token of appreciation. You have to claim it quickly or else answers sports will run out. Your Welcome

Answers

Thanks bro, i appreciate it :]

thanks, you are doing the lords work lol

trying to get missing assignments done

Answers

Answer:

The answer to this question is B

Step-by-step explanation:

I hope it helps

help me with this please​

Answers

Answer:

ok dscaad

Step-by-step explanation:

ok rgeddx

it’s 2 i think i hope this helps

Create 5 word problems using the equations provided. Each word problem should have a maximum of 2 to 3 sentences. Solve your word problem. Be sure to provide the equation for the word problems you are creating.

Answers

This is a word problem for 12.

Laura decided to throw a party. The DJ charged 2 dollars an hour and 4 dollars to use lights and fog. How long did the DJ play?

This one is for 11.

Kate wanted to go skating. When she got there it was 4 dollars an hour. The total cost was 12 dollars. How many hours did she skate?

#13. I have $171. I need to divide the money with 9 people. How much money does each person have?

Brainliest have to be in the surface area

Answers

Answer: 375

the surface area for the whole shade is 375

explanation: you add the area of each shape
you can get 375 sq. units by adding

plese help me with this

Answers

Answer:

there is a 1/2 chance to get heads again

Step-by-step explanation:

im not entirely sure tho

There is 1/2 or 50% chance that you will get heads again

(Trigonometry question)

Answers

Answer:

is the answer 7/25 ? i got 7/25

Answer:

7/25 is the answer

Step-by-step explanation:

sin ○ = opp/ hyp

sin ○ = 7 /25

2/3 a - 1/6 = 1/3

answer this math question asap pls​

Answers

Answer:

a=3/4

Step-by-step explanation:

1. Get 2/3a by itself.

•Turn 1/3 to 2/6 by multiplying 1/3 by 2/2.

•Because you only add and subtract like denominators

This will make it look like:

2/3a - 1/6 = 2/6

Then, add 1/6 to both sides to get 2/3a by itself.

It'll look like this:

2/3a = 3/6

2. Get a by itself.

•Multiply the reciprocal (opposite) of 2/3 to get a alone.

This will look like:

(3/2) • 2/3a = (3/2) • 3/6

a = 18/24

3. Simplify.

Find the largest number that can simplify the equation.

For example, 18 ÷ 3 = 6, and 24 ÷ 3 = 8.

But the largest number you can divide both sides by is 6.

18 ÷ 6 = 3 and 24 ÷ 6 = 4.

3/4.

the answer is a= 3/4

PLS HELP ASAP!!!! will give brainiest

Answers

Answer:

I dont know

Step-by-step explanation:

I need to know what questions you need done because all of them is a lot.

You need to tell me which question so I can give you a correct answer.

While on a plane, Charlie counted the number of adults, children, and empty seats. 1/5 of the seats were occupied by children.
3/4 of the seats were occupied by adults.
10 seats were empty .

A. How many passenger seats were on the plane
B. Write how you figured it out

Answers

Answer:

200 seats

Step-by-step explanation:

Let s = numbers of seats

1/5s = children

3/4 s = adults

10 = empty

The total number of seats = children + adults + empty

s = 1/5s + 3/4s + 10

Subtract 1/5s and 3/4s from each side

s -1/5s -3/4s= 1/5s-1/5s + 3/4s-3/4s + 10

s - 1/5s - 3/4s = 10

Get a common denominator

20s/20 - 4s/20 -15s/20 = 10

Combine like terms

1s/20 = 10

Multiply each side by 20

s/20 *20 = 20*10

s = 200

Answer:

19 seats

Step-by-step explanation:

you take the denominators: 5,4, and 9

then you add them to get 19.

Two step equation - integer


Solve -1 + x/6 = -2 (Show your work!)

Answers

Answer:

Step-by-step explanation:

x/6 - 1 = -2

x/6 = -1

x = -6

x=-6
hope that helps

Answer for free Brainly coins and brainliest later URGENT! :)

Answers

Answer:

36

Step-by-step explanation:

Answer:

In total there are 36 girls.

Step by step explanation:

We apply the proportion.

for every 2 boys there are 3 girls, therefore the rule of three simple applies.

2 boys 3 girls

  Boys ??? girls

it is multiplied crossed where both ends have data, and the result is divided by the remaining number, being:

3 x 24 = 72

72/2 = 36

Pleaseeeeeee help mee i will give u brainliest

Answers

Answer:

erosion

Step-by-step explanation:

It’s Erosion hopefully this helps you

Fill in the blank for the statement below: If a similar figure has been enlarged, the scale factor is a number that is ___________________.

Answers

Answer:

bigger ???

Step-by-step explanation:

Dilations


Explain: A transformation that enlarges or reduces a figure by a scale factor about a center point so that the original figure and its image are similar. If the scale factor is greater than 1, the dilation is an enlargement. If the scale factor is less than 1, the dilation is a reduction

Please Answer this asap

Answers

It’s skewed to the left
it should be skewed left

Of 15 people, 9 wore sandshoes, 8 wore shorts and 3 wore neither sandshoes nor shorts
1. How many people wore both sandshoes and shorts?
2. How many people wore shorts but not sandshoes?

Answers

Answer:

1. 0 2. 8

Step-by-step explanation:

Answer:

1. 0

2. 8

Step-by-step explanation:

help please i dont get this :( answer both of them please!

Answers

Answer:

54, 60

Step-by-step explanation:

The equation for a triangle is 1/2LW= A. So multiply the length (12ft) and the height (9ft), then divide it by half: 12x9=108, 108/2=54. For the parallelogram, you solve it the same way you solve a rectangle, LW=A. The height is the along dotted line with the right angle, going up the side of the parallelogram with give you the wrong answer. 6x10=60 (posting as an answer, originally in the comments)

54,62 I did it and got it right

2b to the third power +5 when b=3
I need the answer like now pls

Answers

Answer:

[tex]{ \tt{2b {}^{3} + 5}} \\ = { \tt{2 {(3)}^{3} + 5 }} \\ = { \tt{59}}[/tex]

Answer:

59

Step-by-step explanation:

We know, b=3

So, 2b³+5

= 2×3³+5

=54+5

=59/ (Ans.)

An archeologist discovered two artifacts buried beneath the ground. She found the first artifact at an elevation of meters and the second at an elevation of meters. What is the distance between these two elevations?
A.
meters
B.
meters
C.
meters
D.
meters

Answers

Answer:

Answer: B

Step-by-step explanation:

Enjoy

B. i think is right

In Triangle OPQ, Side PQ ≅ Side OP, and ∠O=37°. Find ∠P.

Answers

If side Op and PQ are the same their angle measurements are also the same so we have 37+37+P=180
74+P=180
P=180-74
P=106
So

Well u just say that q and o are the same if they are then u do 37+37-180=p

John received a 68%, 72%, and 85% on three of his math tests. After his fourth math test he now has a 79% average. What score did he have received on his fourth test?

A) 79%
B) 89%
C) 91%
D) 100%


PLEASE EXPLAIN WHY OR I WILL RATE TWO STARS!

Answers

Answer:

68+72+85=225

plus 79 =304 divided by 4 = 76

plus 89 =314 divided by 4 = 78.5

plus 91=316 divided by 4 = 79

so the answer is C

plz brainlest

Answer:

91%

Step-by-step explanation:

(0.68 + 0.72 + 0.85 + x)/4 = 0.79

(2.25 + x)/4 = 0.79

0.5625 + 1/4x = 0.79

1/4x = 0.2275

x = 0.91 = 91%

tryyyyy hardddddd!!!!!!!!!!

Answers

Answer:

Step-by-step explanation:

980

8,700 books had minor damage

Refer to the image below.

Answers

Answer:

Median and mode because it is the digit in the middle aka the median and because it is the number that it is the most repeated aka the mode

Step-by-step explanation:

Answer: mode and median

Yuoyoyoyoyoyoyoy HELP!!!

Answers

Answer:

x = 1.2

Step-by-step explanation:

Essentially, because ABCDE and JKLMN are similar, their corresponding sides have a common ratio. To find x, we can simply the ratio between NJ and its corresponding side equal to the ratio of another pair of corresponding sides.

[tex]\frac{BA}{KJ}=\frac{AE}{JN}[/tex]

[tex]\frac{3}{1.8}=\frac{2}{x}[/tex]

3x = 3.6

x = 1.2

T-T this took waaaaaay too long to be helpful but I hope it is anyways!

The answer is 1.2 each side on the bigger shape that correlated with that side on the smaller shape, can be scaled down by a certain amount to get a value for that particular side. So in this problem you would do 2/1.666666666666667 Wich equals 1.2

Please help! Use the geometric mean theorem to solve.

Answers

Answer:

15.41

16.28

17.28

19.30

Step-by-step explanation:

god bless stay safe po

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