2. Explain and correct the error made by a student who simplified this expression.
–2x + 7x + 8
(–2 + 7 + 8)x
13x

Answers

Answer 1
there is no x in 8 so it should’ve been
-2x + 7x + 8 = x(-2+7) + 8

Related Questions

653500 to the nearst thousand

Answers

Answer:

654000

Step-by-step explanation:

653500

5 and over makes the number to the left 1 number

654000

Step-by-step explanation:

654,000 is the answe

At Feet-R-Us colored socks are $5 and white socks are $3. Jimmy buys $32 worth of socks. An equation representing this scenario is 5c + 3w = 32. Solve this equation for c, the cost of 1 pair of colored socks

Answers

Answer:

$5

Step-by-step explanation:

if you want the cost of 1 pair of colored socks, substitute that into c

5(1) + 3w = 32

5 + 3w = 32

subtract on both sides

3w = 27

this means the amount of pairs of white socks is 9.

multiply by 3

$27

then subtract by 32

$5

he only bought 1 pair of colored socks for $5

assuming that no questions are left unanswered, in how many ways can a six-question quiz with 4-choice multiple choice questions be answered?

Answers

Given:

Total number of questions = 6

Choice for each question (in MCQ) = 4

Assuming that no questions are left unanswered.

To find:

The total number ways to answer the quiz, assuming that no questions are left unanswered.

Solution:

Here, Number of ways to answer each question = 4

To find the  total number ways to answer 6 MCQ, we have to have to multiply number of ways to answer each question 6 times.

Total number of ways to answer six-question quiz with 4-choice multiple choice questions is

[tex]4\times 4\times 4\times 4\times 4\times 4=4096[/tex]

Therefore, the required number of ways is 4096.

There are 4096 ways to answer the six-question quiz with 4-choice multiple-choice questions.

We have,

For each question on the quiz, there are 4 choices.

Since each question is independent of the others, the total number of ways to answer the entire quiz can be found by multiplying the number of choices for each question together.

There are 6 questions with 4 choices each.

4 choices for the 1st question * 4 choices for the 2nd question * 4 choices for the 3rd question * 4 choices for the 4th question * 4 choices for the 5th question * 4 choices for the 6th question

= [tex]4^6[/tex]

Using exponential notation,

[tex]4^6[/tex] = 4 * 4 * 4 * 4 * 4 * 4 = 4096

Therefore,

There are 4096 ways to answer the six-question quiz with 4-choice multiple-choice questions.

Learn more about expressions here:

https://brainly.com/question/3118662

#SPJ6

A gallon of milk for $3.98 OR a half gallon of milk for $1.99

Answers

Answer:

The gallon for 3.98, you get ore for your money

Step-by-step explanation:

Answer:

$3.98

Step-by-step explanation: if you was to get 2 half gallons of milk it would be $4 if you get one Whole gallon its $3.98

At a little-known vacation spot, taxi fares are a bargain. A 12-mile taxi ride takes 18 minutes and costs $7.20. You want to find the cost of a 46-mile taxi ride. What unit price do you need?​

Answers

Answer:

unit cost in dollars per mile

Step-by-step explanation:

You are given cost, miles, and time for a certain trip.

You are asked the cost for a certain number of miles, so you need a unit cost of dollars per mile.

$7.20/(12 miles) = $0.60/mile

$0.60/mile * 46 miles = $27.60

By first finding the unit cost per mile, you can then find the cost of the 46-mile trip.

Answer:

0.40, mile

Step-by-step explanation:

because you had to multiply to get the total cost and then divide the number by the total cost.

Shannon’s bicycle travels 50 feet for every 3 pedal turns. How many pedal turns are needed to travel
one mile (1 mile = 5,280 feet)?

Answers

Answer:

316.8

Step-by-step explanation:

take 5280, divide it by 50, and muliply by three.

simplify the expression:
-5 (z - 1) =

Answers

This problem simplified could be -5z-1

Answer:

maybe  -5z-1?

Step-by-step explanation:

The area of a circle is 49π m2. What is the radius?

Answers

Answer: r= 3.95

Explanation: A=πr2

the answer to this question is 3.59

100 percent = Sue's price. 60 percent markup. Retail price is 2 dollars.

Original cost = StartFraction New cost over percent EndFraction. Original cost = StartFraction 2.00 over 1.60 EndFraction. Original cost = StartFraction 2.00 over 1.60 EndFraction times StartFraction 10 over 10 EndFraction

Sue’s Corner Market has a markup of 60% on bottled water. If the market sells a bottle of water for $2, find the original amount that Sue pays.

Sue pays $ for a bottle of water.

Answers

Answer:

1.25

Step-by-step explanation:

did it on edge 2020

Answer:

1.25 i on edge and i got it right

Step-by-step explanation:

What is the slope of 12x + 3y =7

Answers

X=7/12-y/4






Ik this because I did it

Answer: y = -4x + 7/3 so the slope is -4

Step-by-step explanation:

First, we need to put the linear equation into the slope-intercept form: y = mx + b

We do this by subtracting 12x from both sides, so the equation now looks like 3y = -12x + 7. Now we divide both sides by 3 to get y alone, which gives us y = -4x + 7/3

m is always the slope, so the slope of this line is -4 or -4/1.

Find the value of x. Then find the angle measures of the polygon. ​

Please help me as soon as possible, it would be great if you gave me an explanation!

Answers

For number 20:

Because a triangle is 180 degrees, we will equal all the angles we know to that. So, this is how we will write our equation:

Solve for x:

60 + x + 20 + 3x = 180

4x = 100

x = 20

Using 75, you can find the angle measure by plugging 75 where x is present in the angle measures. For example:

x = 20,

20 + 20 = 40

3(20) = 60

-

For number 21:

The shape shown is basically two triangles, so 180 x 2 is 360. Again, same procedure. Add all known angle measures and make an equation where they all equal 360.

Solve for x:

x-5+x+35+1.4x+x=360

x = 75

By isolating x, you should get an answer of 75. Now, plug that into each of the equations:

x = 75

75 + 35 = 110

75 - 5 = 70

1.4(75) = 105

Help me and can you put the equation you used

Answers

Answer:

3.45652173913

Step-by-step explanation:

the equation is 159 divided by 46

Two sides of a right triangle measure 2 units and 4 units. What is the area of the square that shares a side with the third side of the triangle?

Answers

Answer:

The area of the square is 12 squares unit

Write three different complex fractions that simplify to 1/4.

Answers

Answer:

7/11 over 28/11

15/4 over 15

13/16 over 13/4

Step-by-step explanation:

here r some examples

I need help asap will mark you brain list. Show your work

Answers

Answer:

1/251/9

Step-by-step explanation:

Solving exponents

a. 5^-2 = 1/5^2 = 1/25b. (3^2)^3/3^8 = 3^6/3^8 = 1/3^2 = 1/9

Graph 1
Parallel
Perpendicular
Neither

Answers

Graph 1 is parallel
Let me know if you need the other 3

The following table shows how far a runner has gone in t minutes. Which of the following equations represents this information?
A. t = 350d

B. t = 300d + 100

C. d = 350t

D. d = 300t + 100 Minutes (t) Meters (d)
2 700
3 1,050
5 1,750
10 3,500

Answers

Answer:

d = 350t

Step-by-step explanation:

From the information given, we need to get the rate of change of distance which is the velocity (slope.)

velocity = Δd/Δt

v = d2-d1/t2-t1

from the table;

when t = 2, d = 700

when t  = 3, d = 1050

v = 1050/750/3-2

v = 350/1

v = 350

Since v = d/t

350 = d/t

cross multiply

350t = d

Rearrange:

d = 350t

Hence the equation that represents the information is d = 350t

Answer:

D

Step-by-step explanation:

Why complex numbers comes in conjugates numbers?

Answers

Answer:

Complex conjugates are important for finding roots of polynomials. According to the complex conjugate root theorem, if a complex number is a root to a polynomial in one variable with real coefficients (such as a quadratic or a cubic equation), then so is its conjugate.

Step-by-step explanation:

Does this help

Answer:

Complex conjugates are important for finding roots of polynomials. According to the complex conjugate root theorem, if a complex number is a root to a polynomial in one variable with real coefficients (such as a quadratic or a cubic equation), then so is its conjugate.

Step-by-step explanation:

R={(x,y)} y=2x:x€{1,2,3}​

Answers

Answer:

Question is wrong dear

How can the error in the student's work be corrected?

Answers

Answer:

by telling them what they got wrong

Step-by-step explanation:

(LOTS OF POINTS)
SOLVE THIS IMAGINARY NUMBER PROBLEM AND *SHOW WORK* PLEASE!

Answers

Answer:

The answer is 8.

Step-by-step explanation:

the answer is 8 because it is

An Ice cream machine fills cartons at a rate of 1440 pints per hour. How many gallons are filled per minute? 1 gal is equal to 8 pints.

Answers

Answer:

that will be 3 gallons per minute

Step-by-step explanation:

just took it on a test

A.The human race evacuate earth and inhabit mars. Each space shuttle can hold
1700 people.6,840,507,000 people on the planet. How many space shuttle trip will
need to be made?

Answers

Answer:

4,023,828

Step-by-step explanation:

I simply divded the two. I got 4,023,827.6470598824. I rounded it up after.

Raniyah lived in Spain and Colombia for a total of 12 months in order to learn Spanish. She learned an average of 104 words per month when she lived in Spain and an average of 208 words per month when she lived in Colombia. In total, she learned a total of 2080 new words.

Answers

Step-by-step explanation:

that means she spent 3months in Spain to learn Spanish while she spent 9months in colombia

Beth’s annual salary is $20,000. She also earns a variable percent commission on her sales over $500. The percent commission varies on the amount of her sales. If p(x) represents Beth’s percent commission, and f(x) = x − 500, is her amount of sales, which expression represents the commission she earns?
A) p(f(x))
B) f(p(x))
C) p(x) + f(x)
D) p(x) − f(x)

Answers

Answer:

A

Step-by-step explanation:

Here, we want to select the option that best describes the commission earned;

In the question, we are told that the commission is a certain percentage variable on the amount of her sales;

Thus , mathematically to get the percentage commission, we simply need to have;

p(x) of f(x)

This simply refer to placing f(x) into p(x) which can be rewritten as ;

p o f(x)

The closest answer to this is the first option A

Answer:

A if your doing prep

Step-by-step explanation:

math

the solution of the inequality |x + 1| + 2 > 5.

Answers

Answer:

|x + 1| + 2 > 5

use symbolab

I subtracted 14 from 30 and then I multiplied the difference by 6.​

Answers

Your answer will be 96.

Proof:

Step one: Subtract 14 from 30  30-14=16

Step two: Multiply the difference by 6 16x6=96

Hope this helps!

find m
we learned this last week and I forgot, please help!

Answers

Answer:

x=8

Step-by-step explanation:

I think you mean find x, not m.

since angle DEG and angle GEF are a linear pair, they equal 180º.

18x-9 + 4x+13 = 180

22x + 4 = 180

subtract 4 from each side

22x = 176

divide each side by 22

x=8

Which expression is equivalent to 3×-5?

A.28-4-1+x
B.x+x+ 2-1-1-1-1-1
C.-5 - 3x
D.3x+5

Pwease answer ASAP and i will love you​

Answers

Answer:

a 4 b 5 c 7 d 6

Step-by-step explanation:

Answer:

B

Step-by-step explanation:

Which exponent is missing for the given expression ?
( 2x2)(x2)(3x2)3
BECOMES
54x16

Answers

Answer:

896 i think

Step-by-step explanation:

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