Mathematics High School

Analyzing an Error
A student simplifies (6b + 4r) – (2b + r) and says that the result is 4b + 5r. Explain the error and describe the correct steps to simplify the expression.

Answers

Answer 1

Answer:

4b +3r

The student did not subtract both terms in the second parentheses

Step-by-step explanation:

(6b + 4r) – (2b + r)

Distribute the minus sign to all terms in the second parentheses

6b + 4r – 2b - r

Combine like terms

6b -2b   +4r -r

4b +3r

The student did not subtract both terms in the second parentheses

Answer 2

Answer:

4b+3r

Step-by-step explanation:

(6b+4r)-(2b+r)

Distribute the negative symbol across the second set of parenthesis.

6b+4r-2b-r

Add like terms

4b+3r

Error: the student added r instead of subtracting it. They most likely only distributed the negative to the 2b.

Related Questions

Pls help :((((((((((

Answers

Answer:

Top right

Step-by-step explanation:

Rise/run is useful in this situation also is this iready?!

Please I need help and I will give brainliest

Answers

Answer:

he can fill up about 16 more

Step-by-step explanation:

A right triangle has legs of length 7 and 3. What is the length of the hypotenuse?

Answers

Answer:

sqrt 58

Step-by-step explanation:

7^2+3^2=c^2

c=[tex]\sqrt{58}[/tex]

Answer:

sqrt(58)

Step-by-step explanation:

Use the Pythagorean Theorem.

a^2 + b^2 = c^2

3^2 + 7^2 = c^2

9 + 49 = c^2

58 = c^2

c = sqrt(58)

Answer: sqrt(58)


Five whole numbers have the following properties: the range is 9• the
largest number is 11. the mode is 8. the mean is 7 What are the five
numbers?

Answers

Answer:

9,11,8,8,8,8,8,8,8,8,8,8,7,8,8,8,8,8,8

PLSSS HELPPPP I WILLL GIVE YOU BRAINLIEST!!!!!!
PLSSS HELPPPP I WILLL GIVE YOU BRAINLIEST!!!!!! I DONT KNOW HOW TO GRAPH SO CAN YOU SHOW ME HOW TO DO IT PLSSS HELPPPP I WILLL GIVE YOU BRAINLIEST!!!!!! PLSSS HELPPPP I WILLL GIVE YOU BRAINLIEST!!!!!! PLS DRAW IT

Answers

Answer:

The Y-intercept or number after the + or - sign is what you start with then you use rise/run rise=the y value and run = x value to use the constant

Step-by-step explanation:

3+4 + (-5) =
7+5=12-5=7

Answers

Answer:

This is incorrect, the correct answer is 2

Step-by-step explanation:

3+4+(-5)

7+(-5)7-52

Answer:

2

Step-by-step explanation:

Write 3/10 as a decimal number​

Answers

Answer:0.3 there I said it

Step-by-step explanation:

Answer:

0.3

Step-by-step explanation:

You buy a book for 16.99 and pay 6% sales tax. What is the total price including sales tax?

Answers

Answer:

I really think it is

$18.94

please help me on this :(

Answers

Answer:

a. math and dance

b.1

c.Rita and Josh

Step-by-step explanation:

Hope you get it :)

Answer:

no u support ybc

Step-by-step explanation:

% of $900,000 = $225,000

Answers

Answer:

25%

Step-by-step explanation:

225,000/900,000 = 0.25

0.25*100 = 25%

What is the HCF of 36,60,84?​

Answers

(HCF)=(36,60,84)Factors of 36 List of positive integer factors of 36 that divides 36 without a remainder. 1,2,3,4,6,9,12,18,36Factors of 60 List of positive integer factors of 60 that divides 60 without a remainder. 1,2,3,4,5,6,10,12,15,20,30,60Factors of 84 List of positive integer factors of 84 that divides 84 without a remainder. 1,2,3,4,6,7,12,14,21,28,42,84We found the factors 36,60,84 . The biggest common factor number is the HCF number. So the highest common factor 36,60,84 is 12.HOPE IT HELPS....

Can someone please help me I reallly need help
please help

Answers

Answer:

c = 38b

Step-by-step explanation:

b = number of boxes

c = total number of cookies.

It is given to you that there are 38 cookies per box. The given equation means that The total number of cookies can be found by multiplying the amount of cookies per box with the amount of boxes in all.

c = 38b is your answer.

~

please explain,
2 (4m-5) - (6m-11) =33

Answers

Answer:

m = 16

Step-by-step explanation:

2(4m - 5) - (6m - 11) = 33 (Given)

8m - 10 - 6m + 11 = 33 (Distribute)

2m + 1 = 33 (Combine like terms)

2m = 32 (Subtract 1 on both sides)

m = 16 (Divide 2 on both sides)

You can check by substituting your answer into the equation:

2(4(16) - 5) - (6(16) - 11) = 33

2(64 - 5) - (96 - 11) = 33

2(59) - (85) = 33

118 - 85 = 33

33 = 33

Helpppp meeeeeee plsssss

Answers

Answer:

Domain: [-4, ∞)

General Formulas and Concepts:

Algebra I

Domain is the set of x-values that can be inputted into function f(x)

Step-by-step explanation:

According to the graph, our line's x-values span from -4 to infinity. Since -4 is closed dot, it is inclusive in the domain:

Interval Notation: [-4, ∞)

Interval Notation: y ≥ -4

A jug of milk holds 4 quarts. How many liters of milk does the jug hold? Round your answer to the nearest hundredth of a liter. 1 L ≈ 1.06 qt

Answers

Answer:

The answer is 3.785, but rounding it to the nearest hundredth is 3.68 or 3.79, depending on rather they wanted you to take the t and round up or just leave it off.

The jug hold the amount of 3.77 liters of milk.

To find out how many liters of milk the jug holds, we can use the conversion factor that 1 L is equal to 1.06 qt.

Given that the jug of milk holds 4 quarts, we can convert this to liters by multiplying it by the conversion factor:

4 quarts x (1 L / 1.06 qt)

= 3.77 liters

Thus, the jug holds 3.77 liters of milk.

Learn more about Unit Conversion here:

https://brainly.com/question/28600662

#SPJ6

Tom's father gave Tom $100 for lunch at school. After 10 days,
Tom had of the money left. On average, how much money
did Tom spend on lunch each day?

Answers

Answer:

He spent 10 dollars

Step-by-step explanation:

Because, 10, 20, 30, 40, 50, 60, 70, 80, 90, 100.

And that's 10 days, so he spent 10 dollars for everyday. hope that helps!

Sorry if its wrong.

The equation of a straight line is 3x+2y=18
The point where the line crosses the x-axis is (__,__)?

Answers

Answer:

(6,9)..it crosses the x-axis at point 6

Step-by-step explanation:

3x+2y=18

First find the x and y intercept

a) To find x intercept, let y=0

which is 3x+2(0)=18

3x+0=18

3x=18..... divide both sides by 3

x=6

b) To find y intercept, let x=0

which is 3(0)+2y=18

0+2y=18

2y=18...... divide both sides by 2

y=9

The x-intercept of the line is the point at which the line crosses the x-axis.

The x-intercept is given as:

y = 0.

The point where the line crosses the x-axis is at x = 6.

What is an equation of a line?

The equation of a line is given by:

y = mx + c

where m is the slope of the line and c is the y-intercept.

Example:

The slope of the line y = 2x + 3 is 2.

The slope of a line that passes through (1, 2) and (2, 3) is 1.

We have,

The equation of a straight line is 3x+2y = 18.

The x-intercept of the line is the point at which the line crosses the x-axis.

The x-intercept is given as:

y = 0.

Substitute y = 0 in 3x + 2y = 18.

Now,

3x + 2y = 18

3x + 2 x 0 = 18

3x + 0 = 18

3x = 18

Dividing both sides by 3.

x = 18/3

x = 6

The x-intercept is at x = 6.

Thus,

The point where the line crosses the x-axis is at x = 6.

Learn more about equation of a line here:

https://brainly.com/question/23087740

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Shoes and hats are on sale. The expression (s + 24.80) can be used to determine the discount when you buy shoes with a retail price of s dollars and hats with a total retail price of $24.80. Write another expression that can be used to determine the discount.

pls i need help​

Answers

Answer:

1/4+6.20

Step-by-step explanation:

1/4*5 1/4*24.80

1/4 (5+24.80)

1/4s + 6.20

hope it helps

3. Use the relationship between 21 and 25 to decide whether the top and middle shelves are
parallel.

4. Is the bottom shelf parallel to the top shelf? Explain.

5. Is the bottom shelf parallel to the middle shelf? Explain.

Answers

Answer:

Angle between 21 and 25 are co interior angle

Which numbers are integers?Check all that apply.
15
-9
2/3
6 1/9
0
-3,128
4.76

Answers

Answer:

15, -9, 0, -3,128

Step-by-step explanation:

any number that isnt a fraction or decimal :)

15, 0, -3,128, -9 i am pretty sure.

PLZ HALP. WILL GIVE BRAINIEST FOR CORRECT ANSWER WITH STEPS!!!!

Answers

Answer:

See below.

Step-by-step explanation:

1.

3x + 7 + 10x + 17 = 180  ( property of inside angles of 2 parallel lines)

13x + 24 = 180

13x = 180 - 24 = 156

c = 156/13

x = 12.

2.

As the triangle is a right triangle:

42.7 + N = 90

N = 90 - 42.7

= 47.3. degrees.

Answer:

for the first question it will be

Step-by-step explanation:

first make the equation from the numbers you see, (3x+7)+(10x+17)=180

the 180 comes from the lines that the equations are on both of the equations add up to 180 degrees,

then first add all like numbers [(3x+10x) + (7+17) = 180]= 13x+24=180

next subtract the non-variable number (forgot the term for it)

13x+24=180

     -24  -24

      13x=156

then divide the number in front of the variable

13x=156

13    13

x=12

then once you divide the answer is shown so you can put it in

Simplify 3(u-3)-5u Please and thankyou

Answers

Answer:

Step-by-step explanation:

Answer:

-2u-9

Step-by-step explanation:

Simplify

3(u-3)-5u

first, distribute

3u-9-5u

-2u-9

a. Use the domain and range of each of the following relations to determine which is a function. {(3, -3), (9, - 6), (0, -9) b. (3. - 3), (9,- 6), (3 , -9) c. {(3. – 3), (9, - 6), (9,2). (0, -9) ] d. {3, 9, 0, - 4) Please select the best answer from the choices provided A B C D​

Answers

Answer:

A.

Step-by-step explanation:

The domain is the x values, the range is the y values. The x values are not supposed to repeat and give different y values.

please answer the problem ​

Answers

so if there is 50 students in all, 18 take chorus and 26 take band and two take both, we are going to subtract 50-18. 50-18=32. then we are going to subtract 32-26. 32-26=6. then the 6-2. 6-2=4.

answer- 4 students are not enrolled in band or chorus

Please help 30 points

I graphed the seamos out already and the question are in a separate picture

Answers

Answer: On interval f(x) is increasing =  [tex]( -\infty, -2)[/tex]

On interval f(x) is decreasing = [tex]( -\infty, -2)[/tex]

Step-by-step explanation:

The given function: [tex]f(x)=-(x+2)^2+4[/tex]

The graph of the function is attached below

In graph , function is increasing till point (-2,4) or x=-2 and then it is decreasing.

So f(x) is increasing in [tex]( -\infty, -2)[/tex] and decreasing in [tex](-2, \infty)[/tex]

So, On interval f(x) is increasing =  [tex]( -\infty, -2)[/tex]

On interval f(x) is decreasing = [tex]( -\infty, -2)[/tex]

EASY- QUICK ANSWER FOR BRAINLIEST
6×9=?

Answers

Answer:

85

Step-by-step explanation:

i did the maths

You go to the outlet mall with a friend and buy a jacket for $49.00 and new Vans for $55.00. Sales tax in Texas is 8.25%. How much did you spend on these two items after tax? *

Answers

Answer:

Amount spent after sales tax = $112.58

Step-by-step explanation:

Given that:

Cost of jacket = $49.00

Cost of new Vans = $55.00

Total spent = 49.00 + 55.00 = $104.00

Sales tax = 8.25%

Amount of sales tax = [tex]\frac{8.25}{100}*104[/tex]

Amount of sales tax = $8.58

Total after sales tax = 104.00 + 8.58 = $112.58

Hence,

Amount spent after sales tax = $112.58

The pair of points lies on the same line with the given slope. Find x.
(3, 4) (x, 19)

Answers

Answer:4 x 3 = 12 what times 19 = what

Step-by-step explanation:

Match x (Greater than or equal to sign) with its graph.

Answers

D I had dis exact same question

What is the missing polynomial?

?-(20-4x-5x^2) =20-7x^2

PLEASE HURRY!!! 20 points!!!

Answers

Answer:

c

Step-by-step explanation:

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