WILL GIVE BRAINLIEST - 6TH GRADE MATHEMATICS

Angie is showing her work in simplifying −7.9 + 8.2 − 3.4 + 2.1. Identify any errors in her work or in her reasoning.


Step Work Reasoning
−7.9 + 8.2 − 3.4 + 2.1 Original problem
1 −7.9 + 8.2 + (−3.4) + 2.1 Additive inverse
2 −7.9 + (−3.4) + 8.2 + 2.1 Commutative property
3 [−7.9 + (−3.4)] + (8.2 + 2.1) Associative property
4 −11.3 + 10.3 Simplify
5 −1 Simplify
She did not make any errors.
Step 1: She wrote −3.4 incorrectly as + (−3.4).
Step 2: She identified changing the order of the numbers as the commutative property, which is incorrect.
Step 3: She identified changing the grouping of the numbers as the associative property, which is incorrect.

Answers

Answer 1

Answer:

Step 1 it says Additive inverse, that is not additive inverse. Additive inverse is the opposite of a number. There is no opposite number in the problem. And step 5 is the answer, it shouldn't be simplify. Hope that helps! :)

Answer 2

Answer:

step 1

Step-by-step explanation:


Related Questions

Find the total cost to the nearest cent.
$49.95 pair of shoes; 5% tax

Answers

Answer:

$52.45

Step-by-step explanation:

the tax is $2.50, if we add that to $49.95 we get $52.45

Total cost will be $52.45.

What is Percentage?

A relative value indicating hundredth part of any quantity is called percentage.

Given that;

Cost of shoes = $49.95

Tax = 5%

Now,

The value of tax = 49.95 × 5%

                         = 49.95 × 5/100

                         = 2.50

So, Total cost =  $49.95 + $2.50

                     = $52.45

Thus, Total cost will be $52.45.

Learn more about the percentage visit:

https://brainly.com/question/24304697

#SPJ5

You need a piece of paper to measure 56.34 cm. If you tape
two together that each measure 35.87 cm, how much do you
need to cut off?

Answers

Answer:

20.47.

Step-by-step explanation:

You need to 56.34, by 35.87. And you get your answer. 20.47!

h+ j(j – h); use h = 2, and j = 6

Answers

Answer: 32

2+6(6-2)

8(4)

32

PLEASE HELP
Given: AABC with vertices A(5,-2), B(5, -7), and C(1, -2). Which set of
coordinates best repositions the triangle to make a coordinate proof easier?
o (0,0),(4,0), and (4.-5)
O (0,0).(-4,0), and (0, -5)
O(0,0). (0,4), and (5,0)
O (0,0),(4,0), and (0, -5)
None of the other answers are correct

Answers

Answer: (0,0),(0,4), and (5,0)

Step-by-step explanation:

It is easy to find lengths of horizontal and vertical segments and distances from (0,0) so always place one vertex at the origin and one or more sides on an axis.

This answer has an x intercept and y intercept.

Simplify (three^six)^eigthteen

Answers

Answer:

[tex](3^6)^{18}=3^{108}=3.38139191\times10^{51}[/tex]



Which of these graphs represents a function?

Answers

Answer:

C

Step-by-step explanation:

Each x value only corresponds with 1 y value

Mr. Jackson sold 3 computers in the first year . in the second year he sold 4 times more than the first and third year. He was able to sell 6 times as many monitors than the first year how many monitors did Mr. Jackson sell in three years?

Answers

39 computer monitors in 3 years

An orthocenter is the intersection of three
angle bisectors in a triangle.
altitudes in a triangle.
medians in a triangle.
perpendicular bisectors in a triangle.

Answers

Answer:

Altitudes in a triangle

option 2

Step-by-step explanation:

Answer:

B

Step-by-step explanation:

an item is regularly priced at $55 it is priced at a discount of 40 off regular price what is a percent now ​

Answers

Answer:

Thus, a product that normally costs $55 with a 40 percent discount will cost you $33.00, and you saved $22.00. You can also calculate how much you save by simply moving the period in 40.00 percent two spaces to the left, and then multiply the result by $55 as follows: $55 x . 40 = $22.00 savings.

Step-by-step explanation:

. Are the expressions 3(m - 2) + 2(m - 2) and 5(m - 2) equivalent expressions?

Answers

3m - 6 + 2m -4 comblike like terms you get 5m - 10

Then

Factor it you get 5(m -2) so yes the expressions are equivalent

Find the rate of change given the following
points.
(-1, 3) and (1,7)

Answers

Can we see a pic of the answer of this question

Write three expressions equivalent to 3^2 9^2

Answers

Answer:

0-^

Step-by-step explanation:

Fred has $200. He wants to purchase a gym bag for $26 and as many pair of shoes as he can. Each pair of shoes is $45. What is the maximum number of pairs of shoes he can
purchase in addition to the gym bag?

Answers

Answer:

3 shoes

Step-by-step explanation:

You can set up an equation to solve this question like this:

200=45s+26

174=45s

174/45=s

s=3.867

You can't have a part of a shoe, so you have to round down to get 3 shoes

Answer:

3

Step-by-step explanation:

In order to get the answer to this question you subtract in till you can no longer subtract after subtracting the cost of the bag.

What we do know:

[tex]M=200[/tex]

[tex]B=26[/tex]

[tex]S=45[/tex]

[tex]200-26=174[/tex]

[tex]174-45=129[/tex]

[tex]129-45=84[/tex]

[tex]84-45=39[/tex]

[tex]S=3[/tex]

Hope this helps

An internet analytics company measured the number of people watching a video posted on a social media platform. The company found 129 people had watched the video and that the number of people who had watched it was increasing by 30% every 3 hours.
(a)
Write an exponential function for the number of people A who had watched the video n hours after the initial observation. (Enter a mathematical expression.)

Answers

Answer:

(a) The exponential function representing the number of people who had watched the video [tex]t[/tex] hours after the initial observation is [tex]n(t) = 129\cdot 1.3^{\frac{t}{3} }[/tex].

(b) As [tex]n(120) < 5\times 10^{6}[/tex], we conclude that this video is not going "viral".

Step-by-step explanation:

Statement is incomplete. The complete statement is:

An internet analytics company measured the number of people watching a video posted on a social media platform. The company found 129 people had watched the video and that the number of people who had watched it was increasing by 30% every 3 hours.

(a) Write an exponential function for the number of people A who had watched the video n hours after the initial observation.

(b) A video is said to go "viral" if the number of people who have watched the video exceeds 5 million within 5 days (120 hours). Would this video be considered to have gone viral?

(a) From the statement of the problem we get the following relationship:

[tex]\frac{n_{i+1}}{n_{i}}= r^{[(i+1)-i]}[/tex] (Eq. 1)

Where:

[tex]n_{i}[/tex] - i-th number of people watching a video, dimensionless.

[tex]n_{i+1}[/tex] - (i+1)-th number of people watching a video, dimensionless.

[tex]r[/tex] - Increase ratio, dimensionless.

For Induction Theorem, we get the following relatioship for [tex]i = 0[/tex]:

[tex]\frac{n_{1}}{n_{o}} = r^{1-0}[/tex] (Eq. 2)

For [tex]i = m[/tex], the following relationship is constructed:

[tex]\left(\frac{n_{1}}{n_{o}} \right)\cdot \left(\frac{n_{2}}{n_{1}} \right)\cdot ...\cdot \left(\frac{n_{m+1}}{n_{m}} \right) = r^{m}[/tex]

[tex]\frac{n_{m+1}}{n_{o}} = r^{m}[/tex](Eq. 3)

And for [tex]i = m+1[/tex], we have the following expression:

[tex]\left(\frac{n_{1}}{n_{0}} \right)\cdot \left(\frac{n_{2}}{n_{1}} \right)\cdot ...\cdot \left(\frac{n_{m+2}}{n_{m}} \right) = r^{m+1}[/tex]

[tex]\frac{n_{m+2}}{n_{0}} = r^{m+1}[/tex](Eq. 4)

If we multiply (Eq. 3) by the (m+1)-th ratio based on (Eq. 1):

[tex]\left(\frac{n_{m+1}}{n_{o}}\right)\cdot \left(\frac{n_{m+2}}{n_{m+1}} \right) = r^{m} \cdot r[/tex]

[tex]\frac{n_{m+2}}{n_{o}} = r^{m+1}[/tex]

Which is (Eq. 4) and the exponential function is represented by:

[tex]n_{i+1} = n_{o}\cdot r^{i}[/tex], [tex]i\in \mathbb{N}_{O}[/tex] (Eq. 5)

As the number of people is increased at constant rate every 3 hours, we get that [tex]i[/tex] is:

[tex]i = \frac{t}{3}[/tex], [tex]t \in \mathbb{R}[/tex], [tex]t \geq 0[/tex] (Eq. 6)

Where [tex]t[/tex] is the time, measured in hours.

Then, the exponential function is:

[tex]n(t) = n_{o}\cdot r^{\frac{t}{3} }[/tex] (Eq. 7)

Where [tex]n_{o}[/tex] is the initial number of people watching the video, dimensionless.

If we know that [tex]n_{o} = 129[/tex] and [tex]r = 1.3[/tex], then the exponential function representing the number of people who had watched the video [tex]t[/tex] hours after the initial observation is:

[tex]n(t) = 129\cdot 1.3^{\frac{t}{3} }[/tex]

(b) If we know that [tex]t = 120\,h[/tex], then we evaluate the exponential function:

[tex]n (120) = 129\cdot 1.3^{\frac{120}{3} }[/tex]

[tex]n(120) = 4.659\times 10^{6}[/tex]

As [tex]n(120) < 5\times 10^{6}[/tex], we conclude that this video is not going "viral".

Estimate the answers to these calculations (167.8 x 24) /38

Answers

Answer:

105.978947368

Step-by-step explanation:

Xavier has a lunch food budget of $120 a month. He spends an average of $6 per day on lunch. Create a table and then a graph to represent the relationship. Then write an equation
where d represents the number of days and m represents that amount of money he had left.

Answers

Answer:

m= 120 - 6*d

Step-by-step explanation:

budget is $120 per 1 month, spends $6 per 1 day

on the the table you have 2 columns: one labele it "days" and one "$ spent" and fill it in:  

days: 1,2,3,4,..

$ spent: 6, 6*2=12, 6*3= 18, 6*4= 32,...

on the graph lable the horizontal axis "days" and the vertical axis "$ spent"

now plot the points (1,6), (2,12),(3,18), ..., and draw a line trough them

the equation is

m= 120 - 6*d

so after 20 days for example, out of 120 will have m=120-6*20=120-120=0,

$0 wil have in 20 days

Are the ratios 30:15 and 32:12 equal?

Answers

Answer:

No, they are not

Step-by-step explanation:

The ratio is 62:27 if I’m wrong I’m so sorry
:(

7. Find the inverse of f(x) = 4x^3 + 8.

Answers

Answer:

The inverse of [tex]\displaystyle{f(x)=4x^3+8}[/tex] is determined to be [tex]{f^{-1}(x)=\sqrt[3]{\frac{1}{4}x-8}[/tex].

Step-by-step explanation:

In order to find the inverse of a function, we need to know a couple of rules about functions.

f(x) = yTo find the inverse, we flip the y-variable with the x-variables and solve for y.

Following these rules, our function now becomes [tex]\displaystyle{x=4y^3+8}[/tex].

We now can simplify it further in order to find the value of x.

[tex]\displaystyle{x=4y^3+8}\\\\4y^3=x-8\\\\y^3=\frac{x}{4}-8\\\\\sqrt[3]{y^3}=\sqrt[3]{\frac{x}{4}-8} \\\\y = \sqrt[3]{\frac{1}{4}x-8}\\\\f^{-1}(x)= \sqrt[3]{\frac{1}{4}x-8}[/tex]

Therefore, the inverse of [tex]\displaystyle{f(x)=4x^3+8}[/tex] is [tex]\displaystyle{f^{-1}(x)=\sqrt[3]{\frac{1}{4}x-8}[/tex].

Answer:

[tex]\huge\boxed{f^{-1}(x) = \sqrt[3]{\frac{x-8}{4}}}[/tex]

Step-by-step explanation:

In order to find the inverse of a function, we need to follow a series of steps.

1. Write the function in the form [tex]y=ax^b+c[/tex]

2. Swap where the x and y values are

3. Solve for y

4. Convert into [tex]f^{-1}(x)[/tex] form

So first, we can write [tex]f(x)=4x^3+8[/tex] as [tex]y=4x^3+8[/tex].

Now we need to swap where the x and y variables are. This makes our equation [tex]x=4y^3+8[/tex].

To find the inverse, we now need to solve for y in this equation.

[tex]x=4y^3+8[/tex] Subtract 8 from both sides:[tex]x-8 = 4y^3[/tex] [tex]4y^3 = x-8[/tex] Divide both sides by 4:[tex]y^3 = \frac{x-8}{4}[/tex] Take the cube root of each side: [tex]y = \sqrt[3]{\frac{x-8}{4}}[/tex] Convert into [tex]f^{-1}(x)[/tex] form [tex]f^{-1}(x) = \sqrt[3]{\frac{x-8}{4}}[/tex]

Therefore, the inverse of this function is [tex]f^{-1}(x) = \sqrt[3]{\frac{x-8}{4}}[/tex].

Hope this helped!

hey im new , who can show me how to use this ,thanks

Answers

Answer:

Sure, if u want to ask a question click question, however you need to answer questions to recieve points in order for you to ask questions. So answers some questions then you can ask  

Step-by-step explanation:

PLEASE HELPP THIS IS IN A DIFFERENT language TO MY BRAin I swear My brain is LagGiNg RN

Answers

Answer:

A

Step-by-step explanation:

the first number in slope intercept is the slope and the second number is the y-intercept

Answer:

The answer is Choice a

Step-by-step explanation:

What is the slope in the linear equation y= -3x +7?​

Answers

Answer:

-3

Step-by-step explanation:

the coefficient of the x term is the slope in any equation that is in slope intercept form

Answer:

-3 is the slope

Step-by-step explanation:

The equation is in slope intercept form

y = mx+b where m is the slope and b is the y intercept

y = -3x+7

-3 is the slope and 7 is the y intercept

Someone help please I can give brainlist?

Answers

Answer:

-2.4f - 21

Step-by-step explanation:

Omar has a gift card for $25 at a clothing store. He wants to buy socks that cost $4 per pair. He also has a coupon for $5 off his entire purchase. Omar wants to know how many pairs of socks he can buy. Write and inequality that represents the situation.

Answers

Answer:

4x ≤ 30

Step-by-step explanation:

Omar gets 30 dollars off because $25 + $5 = 30. Let x = pairs of socks

We know each pair costs $4, so the cost would be 4x. Omar has to buy as many pairs as he can with only the coupon and gift card. Omar has to spend $30 (the full discount) or less than $30. Therefore, the inequality would be: 4x ≤ 30 or 4x is less than or equal to 30 ($30).

Answer: 4p-5_<25

Step-by-step explanation:

i got i right

help me with this plzz i need answer asap

Answers

Answer:

oof this is easy

Step-by-step explanation:

Straight angles consists with

two right angles

2

Straight angles consists with

one obtuse angle and one acute angle

RESULT

My friend is wrong because a straight angle either consists with two right angles or one obtuse angle and one acute angle.

Find the value of in the triangle shown below

9, 7, and x around the triangle

Answers

Answer:

Step-by-step explanation: 56

Answer:

130 is correct

Step-by-step explanation:

Aubrey’s monthly bank statement shows a total of $51 in fees for ATM withdrawals. If Audrey made 17 withdraws, what is Audrey charged for each withdrawal?

Answers

Answer:

Audrey was charged $3 for each withdrawal.

Step-by-step explanation:

We have to calculate the amount of money charged on one transaction.

In order to find the amount for one ATM withdrawal, the total amount for ATM withdrawals will be divided by number of withdrawals.

Given

[tex]Total\ ATM\ withdrawal\ fees = \$51\\Total\ withdrawals = 17\\Amount\ for\ one\ withdrawal = \frac{Total\ fees}{No.\ of\ withdrawals}\\= \frac{51}{17}\\= \$3[/tex]

Hence,

Audrey was charged $3 for each withdrawal.

is the relation function?

choose the correct answer


marking brainlist

Answers

Answer:

Not a function because an output has two different inputs

Step-by-step explanation:

what are all the factors of 32?

Answers

The factors of 32 are / 1, 2, 4, 8, 16, and 32.

Write the equation of the line through (3,9) and (-2,9)

Answers

Answer:

y = 9

Step-by-step explanation:

y-y1 = m(x-x1)

m is the slope =y2-y1/x2-x1=9-9/-2-3=0

pick any number out of the given two for (x1, x2)

y-9 = 0*(x-3) so

y-9 = 0 add 9 to both sides

y = 9

brainlest!!!!!!!!! please help me
all the choices are the same
please help thx!!!!!

Answers

Answer:

Graph 1- last option choice

Graph 2- first option choice

Graph 3- third option choice

Graph 4- second option choice

Hope this helps stay safe!

Step-by-step explanation:

When graphing a linear inequality on a number line, use an open circle for "less than" or "greater than", and a closed circle for "less than or equal to" or "greater than or equal to".

Answer:

1. x < 1

2. x </= 1

3. x >/= - 1

4. x > 1

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At the beginning of every gym class, Mr. Gordon leads the class in a warm-up. In todays warm-up, the class does jumping jacks for 3 minute. Erin does 54 jumping jacks in that time. Mr. Gordon says the class will do jumping jacks 4 minutes tomorrow. If Erin does jumping jacks at the same rate tomorrow, how many will she she do. In a scale drawing of a house, 2 inches : 5 feet. The actual kitchen of the house will be 17 feet long. How long will the drawing of the kitchen be?A. 5.2B. 6.8C. 7.5D. 8 Tell whether the ordered pair (2, -5) is a solution of the system:x + 3y = -134x + y = 3yes or no B jada writes this equation for the sum of the ages (x)+(x+3) +3(x+3)-1=87 explain the meaning of the variable and each term of the equation. A triangle is shown.Drag graphs to the table to show the image of the triangle after it is reflected over the x-axis, the y-axis, or the line y=x. g(10) what does it equal to? When you eat a balanced diet, it can lead to _______. Avril is reading the first Harry Potter book, Harry Potter and the Sorcerer's Stone. The book has a total of308 pages. If Avril has read 33 pages after reading for 18 minutes, will she be able to finish the book in 3hours? Depending on how long it takes Avril to read the book, how many more minutes will she need orhow many extra minutes will she have before 3 hours have passed? Although Joshua is an alcoholic, he is able to control his drinking when he parties with his friends. Please select the best answer from the choices provided. -10(-3)=?I need an answer quick pleaseee The results of Supreme Court proceedings can beused as precedent in future cases.overturned in appeals.used to retry past cases.vetoed by the president. How should you organize the ideas in your informative report? A. sentence-by-sentence B. it varies by the report topic C. general to specific or specific to general D. focused on only one main idea Choose the sentence showing correct use of capital letters.Group of answer choicesAlbert Einstein once said that gravitation "Cannot be held responsible for people falling in love." Need help!!! Also don't joke around please HelpWhich describes pressure during a volcanic eruption? Pressure increases as magma rises. Pressure traps dissolved gases in magma. Pressure increases until the volcano explodes. Pressure from rocks above causes new rocks to form. There are (3^2)4 30 bacteria in a petri dish. What is the total number of bacteria in the dish? 38 39 311 324 Which of the following statements best explains how roots aggregate soil?The hairs and tendrils of roots grasp the soil and bind the particles together. The nutrients flow from roots into the ground to bind the particles together.The roots attract water and help the soil bind the particles together.The plants release acid through the root into the soil to bind the particles together. Graph the line with slope1/2 and y-intercept -9 2.5kg of potatoes cost 1.40Work out the cost of 4.25kg of potatoes is y=12x+5 proportional