Mathematics Middle School

1. Simplify the expression and show each step.
6x+1 -(3x-1

2. Which expression is equivalent to
(3x-1)-2.75(x+2

3. Matt and his friends paid $30 for 4 sandwiches and 4 bottles of water. Each sandwich cost the same amount. The bottles of water cost $2 each. how much does the sandwich cost

Answers

Answer 1

Answer:

1. 3x + 2

2. 0.25x - 6.5

3. $5.50 per sandwich

Step-by-step explanation:

1.

6x + 1 - (3x - 1)

PEMDAS says solve everything in the parentheses first

There is nothing left to simplify within the parentheses.

Since there's also no exponents, multiplication, or division, let's combine like terms starting from left to right

6x - 3x + 1 + 1

Negative + Negative = Positive, hence why it became 1 + 1

3x + 2

2.

(3x - 1) - 2.75 (x + 2)

PEMDAS says to do multiplication next (since parentheses are fully simplified and there are no exponents)

(3x - 1) - 2.75x - 5.5

Negative + Positive = Negative, hence why it became -5.5

3x - 1 - 2.75x - 5.5

Combine like terms

3x - 2.75x - 1 - 5.5

0.25x - 6.5

3.

Set up an equation:

Variable x = cost of sandwiches

4x + 4(2) = 30

4x + 8 = 30

Subtract 8 from both sides to isolate the variable

4x + 8 - 8 = 30 - 8

4x = 22

Divide both sides by 4

4x ÷ 4 = 22 ÷ 4

x = 5.5

$5.50 per sandwich

Related Questions

y=3x+14
2x-3y=-14
Substitution method

Answers

X= 14
Y= -45

2x-3y=-14
y=3x+14

the correct answer should be y=3x+14

A grocery store receives a shipment of 700 oranges. The manager randomly selects 25 oranges to weigh. In that sample, 2 oranges weigh 5 ounces. How many oranges in the shipment can the manager predict weigh 5 ounces?

14
56
644
698

Answers

The answer is 56 because 700/25=28 and 28*2=56

Camille shaded _1 8
30 of a model. Write the decimal that represents the
unshaded portion of the model.

Answers

Answer:

you are saying it wrong its 1\8 and 3\3

Step-by-step explanation:

A storage box has a Volume of 56 cubic inches and the base of the box is 4 what is the height of the box?​

Answers

Answer:

56 x 4 =224

Step-by-step explanation:

Answer:224 56x4
Hope this helps

Hey I need help please. If a correlation coefficient is -0.9 what can you say about the data. Also this is a separate question but what does it mean for 2 sets of data to be positively correlated.

Answers

Answer:

Step-by-step explanation:

A correlation coefficient is a numerical measure of some type of correlation, meaning a statistical relationship between two variables. The variables may be two columns of a given data set of observations, often called a sample, or two components of a multivariate random variable with a known distribution.                          Pearson’s correlation coefficient returns a value between -1 and 1. The interpretation of the correlation coefficient is as under:

If the correlation coefficient is -1, it indicates a strong negative relationship. It implies a perfect negative relationship between the variables.

If the correlation coefficient is 0, it indicates no relationship.

If the correlation coefficient is 1, it indicates a strong positive relationship. It implies a perfect positive relationship between the variables.

A higher absolute value of the correlation coefficient indicates a stronger relationship between variables. Thus, a correlation coefficient of 0.78 indicates a stronger positive correlation as compared to a value of say 0.36. Similarly, a correlation coefficient of -0.87 indicates a stronger negative correlation as compared to a correlation coefficient of say -0.40.

Correlation Values

In other words, if the value is in the positive range, then it shows that the relationship between variables is correlated positively, and both the values decrease or increase together. On the other hand, if the value is in the negative range, then it shows that the relationship between variables is correlated negatively, and both the values will go in the opposite direction.

Please help!!! will give brainliest

Answers

Answer:

The answer is B

Step-by-step explanation:

3 to the forth power = 81

3 to the second power = 9

81/9 = 9

Answer:

b: 9

Step-by-step explanation:

3x3x3x3= 81

3x3=9

81/9=9

WHOEVER ANSWERS FIRST
WILL GET BRAINLIEST!!!
What is the sum of two numbers 9 and their difference is 7

14 POINTS!!!!

Answers

Answer:

8 and 1

Step-by-step explanation:

8 + 1 = 9

8 - 1 = 7

Answer:

Step-by-step explanation:

Let b>a

a+b=9 and b-a=7 upon adding these two equations together

a+b+b-a=9+7

2b=16

b=8, given a+b=9

a+8=9

a=1

So the two numbers are 1 and 8

All of the following represent the same set of numbers except

positive integers
whole numbers
natural numbers
counting numbers

Answers

Let us define each :

1. Natural numbers : the positive integers (whole numbers) 1, 2, 3, etc., and sometimes zero as well.

2.Whole numbers: Whole Numbers are simply the numbers 0, 1, 2, 3, 4, 5, ... (and so on)

3. Positive integers: The positive integers, z+ , consist of the whole numbers beginning with one.

4. Counting numbers: Any number you can use for counting things: 1, 2, 3, 4, 5, ... (and so on). Does not include zero.

So we can say that whole numbers is the odd one out, since it includes 0 and others dont.

The answer is whole numbers because only whole numbers are the set that starts from zero.

PLEASE HURRY I WILL GIVE BRAINLEIST

x + 3 = -x - 5

1 - 2x = -x - 3

x - 2 = -3x + 2

3y + 1 = 4y - 6

2 + 6x = 1 - x

5y + 4 = 4y + 5

Answers

1. No solution
2. X=4
3. X=1
4.y=7
5. X=3/7
6.y=1
1. No solution 2. X=4 3. X=1 4. Y=7 5. X=3/7
6. Y=1

Bob made 3 identical necklaces, each having beads and a pendant. The total cost of the beads and pendants for all 3 necklaces was $20.40 . If the beads cost a total of $8.70 , how much did each pendant cost?

Answers

67 because it’s a even number and yea am just writing random stuff so yea good luck man
$3.90 each

$20.4 total, minus $8.7 for beads= $11.7 for pendants

$11.7/3= $3.9 each

PLS SOMEONE HELP PLS

Answers

Answer:

30$

Step-by-step explanation:

Answer:

The cost per calculator is $30

Step-by-step explanation:

4 calculators = $120

Therefore, each calculator is :-

$120 divided by 4

= $30

Plsssssss help meeeeeee

Answers

1.

total surface area Stot = 20.4924225 cm2

lateral surface area Slat = 16.4924225 cm2

bottom surface area Sbot = 4 cm2

2.

total surface area Stot = 46.1079506 ft2

lateral surface area Slat = 37.1079506 ft2

bottom surface area Sbot = 9 ft2

3.

total surface area Stot = 95.0467761 ft2

lateral surface area Slat = 68.0067761 ft2

bottom surface area Sbot = 27.04 ft2

What the first dude said

can someone please help me with this what is 2x + 1x + 4

Answers

Answer:

3x + 4

Step-by-step explanation:

2x + 1x + 4 =

(2x + 1x) + 4 =

3x + 4

Hope that helps!

Answer:

3x + 4

Step-by-step explanation:

add the x's together and add the 4.

PLZZZZ HEEELLLPPP

Four runners start at the same point; Lin, Elena, Diego, Andre. For each runner write a multiplication equation that describes their journey.

Lin runs for 25 seconds at 8 meters per second. What is her finish point?
Elena runs for 25 seconds and finishes at 250 meters. What is her velocity?
Diego runs for 25 seconds at -8 meters per second. What is his finish point?
Andre runs for 5 seconds at -6 meters per second. What is his finish point?

Answers

Answer:

Step-by-step explanation:

h

1. 25x8

2. 250 divide by 25

3. 25x-8

4. 5x-6

The second question is: How many pages did rob read? Round your answer to the nearest tenth

Answers

117.2=q+17.6

q= 99.6

1.75(99.6) =174.3

Hannah read 99.6 pages so rob read 174.3 pages

please help me i dont understand this

Answers

The answer would correctly by 14.24, just add them up

749ml= --------L please answer this question

Answers

Answer:

The answer is 0.749 L.

Step-by-step explanation:

L, dc, cl, ml

0. 7 4 9

plz help 20 points
Two random samples of 25 people were asked how many 12-ounce cans of soda they consume each week. The first sample contained both males and females, aged 12-19. The second sample contained both males and females, aged 20-39. The results are shown in the table below. Using complete sentences, make one inference comparing the two groups and explain your reasoning.

Sample #1
16 11 9 12 11
10 10 8 15 0
2 15 14 7 11
5 14 20 3 11
14 7 0 5 21
Sample #2
21 14 0 3 6
7 10 11 7 9
14 0 15 5 12
20 0 12 11 6
0 21 14 0 6

Answers

Answer:The data is pretty evenly distributed in the age 20-39 group.

There are no outliers in either age group.

The range of the two age groups is the same.

Both data sets contain about the same amount of variation.

Step-by-step explanation: Plz make brainiest.

Answer:

Sample #1 : 16 11 9 12 11  10 10 8 15 0  2 15 14 7 11  5 14 20 3 11  14 7 0 5 21 =

0 0 2 3 5 5 7 7 8 9 10 10 11 11 11 11 12 14 14 14 15 15 16 20 21

you just need to pout them in order least to grates

Sample #2 : 21 14 0 3 6  7 10 11 7 9  14 0 15 5 12  20 0 12 11 6  0 21 14 0 6 =

0 0 0 0 0 3 5 6 6 6 7 7 9 10 11 11 12 12 14 14 14 15 20 21 21

you just need to pout them in order least to grates

Step-by-step explanation:

Three less than on-half a number is -71

Answers

Your Answer:

B. 1/2n-3

Explanation:

One way to get half a number is to multiply it by 1/2.

The phrase "a number less than an other number" often indicates subtraction.

B. That would be the correct choice. Have a wonderful day

can someone help me please

A small business earns a profit of $6500 in January and $17,500 in May. What is the rate of change in profit for this time period?

Answers

Triple I think if not plz list the option

4 months have passed: february, march, april, may

$11,000 have been gained: 17500-6500

11,000/4 = 2750 per month

proof:

january: 6500

feb: 9250

mar: 12000

apr:14750

may:17500

NO LINKS
Lucy typed 3,756 words in 28 minutes. Let “w” represent the words typed each minute. If Lucy typed the same number of words each minute, how many words did she type each minute?

include an explanation on how you got your answer

Answers

Answer:

134 words per minute

Step-by-step explanation:

Divide the amount of words by the time

3756/28 = 134.1429

I got the same answer ⬆️

Plz help me thankyou:))))))

Answers

Answer:

X=54

Step-by-step explanation:

There are multiple steps to find this problem:

So in a triangle, the opposite inverse angles are congruent,

meaning <LQM and <PLQ are congruent so <LQM is also 70 degrees

a triangle = 180 degrees, therefore, triangle QLM can be solved by adding

54 and 70 to find the measure of the 3rd angle

54+70= 124, then 180 (because its the total amount of the triangle) - 124= 56

Then, we know that <QLM and <PQL are congruent angles as they are opposite inverse angles.

So, <PQL also equals 56 degrees

Then to find the 3rd angle of the triangle PLQ you can add 56 and 70 to find the 3rd angle

56+70= 126, Then 180 - 126= 54

So, X=54

Plssssssss help meeeeee

Answers

add all of them then you would get the answer

total surface area Stot = 139.843135 ft2

lateral surface area Slat = 120 ft2

top surface area Stop = 9.92156742 ft2

bottom surface area Sbot = 9.92156742 ft2

200 cm= _________ meters

Answers

Answer:

2m

Step-by-step explanation:

tfxfugxfzzffggzz6tfftzf

Answer:

2 meters

Step-by-step explanation:

100 cm = 1 meter

200/100= 2

What value of w is a solution to this equation?
w/2 = 6
w = 10 or w = 12

Answers

W=12 would be the correct answer. I got this because if you divided 12 by 2, (12/2) you would get 6!

w = 12

just multiply 2 by 6 and then you will be left with W equals 12

Solve this equation and why this answer is correct.

Answers

Answer:

s = 21

Step-by-step explanation:

Multiply both sides of the equation to get rid of the fraction.

7*3 = 21

Michael tracks his pay. He has already earned $97.75. He determined that the expression 97.75+17.80h represents the amount of money, in dollars, he has earned at hours.

Based on the given expression, about how many hours does it take Michael to earn 678.25?

Answers

33 hrs. Because 678.25-97.75= 580.5 and when you divide 580.5 by 17.80 you get 32.61 and you round that up to get 33 hrs

A teacher orders homework books for her class of 30 students.
The total value of the order is $135.
Two more students join her class, so she orders two extra books.
What is the total value of the order now? $

Answers

Total value: $144
Explanation: each book cost $4.50

Answer:

The total value of the order now is $142.

Step-by-step explanation:

assuming all books are at the same price

135 ÷30=4.5

2x4.5=7

135+7=142

How far from the base of the house do you need to place a 15’ ladder so that it exactly reaches the top of a 12’ wall?

Answers

Answer:

3' away

Step-by-step explanation:

3’ ft!




basically, you just subtract the 15 and the 12 ft together to get the 3!

Nathan is 3 years older than Olivia. Determine the equation if n represents the age of Nathan and o represents the age of Olivia.
A. n = o + 3
B. o = n + 3
C. n = 3o
D. o = 3n

Answers

Answer: A, n=o+3

Step-by-step explanation:

Nathan (n) is 3 years older than Olivia (o) so Nathan's age would equal Olivia's age plus 3 years.

Hope this helps :)

Answer: A

Step By Step Explanation: Since Nathan Is 3 Years Older we take Olivia age and add 3 to it to get Nathan Age
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