Which of the equations are true identities? A. n(n –2)(n + 2) = n³ – 4n B. (x + 1)² – 2x + y² = x² + y² + 1 Choose 1 answer: Only A Only B Both A and B Neither A nor B​

Answers

Answer 1

Answer:

a+b

Step-by-step explanation:

both are true identities


Related Questions

The zeros for f(x) = x4 – 3x3 – 4x2 + 12x
are
A. (0,2,3)
B. (0, +2,3)
C. (0,2-3)
D. (0, 2, +3)

Answers

Answer: A

Step-by-step explanation: I got 0,-2,2,3

Draw the graphs of the lines below on the same grid to find the coordinates of the point of
intersection.
y = x
y = 3x - 4

Answers

Answer:

(2,2) is the solution of the given lines.

Step-by-step explanation:

Given that,

y = x ..(1)

y = 3x-4 ...(2)

We need to find the coordinates of the point of intersection.

From equation (1) and (2).

x=3x-4

4 = 3x-x

4 = 2x

x = 2

Also,

y = 2

Hence, the coordinates of the point of  intersection is (2,2).

A train travels 240 miles in 6 hours. At this rate, how far could the train go in 13 hours?

Answers

Answer:

Step-by-step explanation:

520 miles

explain why 1/6 hour + 1/3 hour =1/2 hour​

Answers

Answer:

1/6+1/3

=3+6/6×3

=9/18

=1/2

Step-by-step explanation:

Hope you find this helpful!

Answer: It does because 1/3 is equal to 2/6. in order to add them, they have to have the same denominator. and if you add 2/6 to 1/6, you get 3/6. 3/6 is also equal to 1/2, if you divide both sides by 3.

Step-by-step explanation:

5 (y + 6) + 2y < 4 (y+2) - 5

Answers

Answer:

I think the answer is Y < -9

Answer:

i think the answer is 7y + 30 < 4y + 3

please help for gods sake:(

Answers

Answer:

answer is b)

Step-by-step explanation:

please mark me brainliest

Answer:

The answer is B

Step-by-step explanation:

Mark me

What is the measure of angle x? Show or explain how you know.

Answers

Answer:

65 degrees

Step-by-step explanation:

y is a right angle and a is 30 degrees. this means that the supplementary engle of x is 45 plus 70 which is 115. 180-115 = 65 degrees.

A school librarian ordered new books for the library. Of the new books ordered 1/3 are science and 2/5 are biography, and the rest of the books are friction. What fraction of the book ordered are friction?

Answers

Answer:

4/15

Step-by-step explanation:

1/3=5/15

2/5=6/15

6+5=11

15-11=4

4/15 books a fiction

Given: RST, RS = 15, ST = 20, and TR = 29
Which inequality correctly compares the measures of the angles of RST?

Answers

Answer:

can i see a picture?

Michelle is scuba diving. Her position changes from -2.1m to -38.6m in 6 1/4 min. What is the average change in Michelle's position each minute?

Answers

Answer: 5.824 m / min

Step-by-step explanation:

Change in position = -2.1m to -38.6m

Distance = |-38.6 m - (-2.1m) |

=|-36.5| m

= 36.5 m

Time = [tex]6\dfrac14\ min=\dfrac{6\times4+1}{4}\ min[/tex]

[tex]=\dfrac{25}{4}\ min[/tex]

The average change in Michelle's position each minute = [tex]\dfrac{36.5}{\dfrac{25}{4}}\text{ m/min}[/tex]

[tex]=\dfrac{36.4\times4}{25}\text{ m/min}\\\\= 5.824\text{ m/min}[/tex]

Hence, the average change in Michelle's position each minute = 5.824 m / min

A store sells a pound of bananas for $0.40 and a pound of cabbage for $0.56. Can you buy more pounds of bananas or cabbage with $7? How many more pounds?

Answers

Answer:

The bananas will cost $1.38.

Step-by-step explanation:

Explanation:

Multiply the number of pounds by the price per pound.

2.51lb×$0.55lb=$1.38

WILL GIVE BRAINLIEST

Answers

Answer:  A

Step-by-step explanation: T is the variable for temp.

and since its asking for an equality at needs to be greater than or equal to 100f  

x−5.2=−18.73


Need

Help

Answers

Answer:

-13.53

Step-by-step explanation:

x=-13.53

Hope it helped

what are the first 5 terms of 30-n^2

Answers

Answer:

29, 26, 21, 14, 5

Step-by-step explanation:

To find the first 5 terms, substitute n = 1, 2, 3, 4, 5 into the n th term formula.

30 - 1² = 30 - 1 = 29

30 - 2² = 30 - 4 = 26

30 - 3² = 30 - 9 = 21

30 - 4² = 30 - 16 = 14

30 - 5² = 30 - 25 = 5

The first 5 terms are 29, 26, 21, 14, 5

PLEASE HELP WILL GIVE BRAINLIEST!!!! Write an equation in standard form of the line that passes through the given points. (-2,-1),(-4,-6).

Answers

Answer:

If its in parobola form here is your answer

Step-by-step explanation:

y=5(x+1/5)^2-26/5

The dimensions of a rectangular building used to store tools for electrical lineman has a length of 12x+24 feet and the width of 20x-10 feet.

1.Write the expression that represents the area of the building, in terms of x.
2. Write the expression that represents the perimeter of the building, in terms of x.
3. If the perimeter is going to be 220 feet, what are the dimensions of the building.

Answers

Answer:

a) Area = 2x² + 3x - 2

b) Perimeter = 64x + 28

c) Length = 60 feet and Width = 50 feet

Step-by-step explanation:

It is given that:

Length of building = 12x + 24

Width of building = 20x - 10

Area = Length * Width

Area = (12x + 24) * (20x - 10)

Area = 12x(20x - 10) +24(20x-10)

Area = [tex]240x^2-120x+480x-240[/tex]

Area = [tex]240x^2+360x-240 = 2x^2+3x-2[/tex]

Perimeter = 2 (Length + Width )

Perimeter = 2 (12x + 24 + 20x - 10 ) = 2 (32x +14 )

Perimeter = 64x + 28

Putting Perimeter = 220

220 = 64x + 28

64x = 220 - 28

64x = 192

Dividing both sides by 64

x = 3

Length = 12(3) + 24 = 36 + 24 = 60 feet

Width = 20(3) - 10 = 60 - 10 = 50 feet

Therefore,

a) Area = 2x² + 3x - 2

b) Perimeter = 64x + 28

c) Length = 60 feet and Width = 50 feet

2 questions…
1. order the intergers {-10, -25, 25, 10, -50} from least to greatest.
2.what is the area of the rectangle?
(image provided for both questions, thank you!)

Answers

Answer:

1) (-50) <(-25) < (-10) < 10 < 25

2) 150 in^2

Step-by-step explanation:

For the first question we list the numbers according to their sign(start from negative)

For the second question we multiply height with width to find the area of the rectangle.

Question :-

1. order the intergers {-10, -25, 25, 10, -50} from least to greatest.

2.what is the area of the rectangle?

Answer:-

1.

we know that,

negetive numbers are smaller than positive number,

According to the question,

order the intergers {-10, -25, 25, 10, -50} from least to greatest is:-

[tex]\bold{(-50) <(-25)<(-10)<10<25  }[/tex] 

2.

we know that,

Area of rectangle =length ×breath

According to the question,

lenght=15 inbreadth=10 in

[tex]\bold{Area=15×10   }[/tex] 

[tex]\bold{Area=150~in^{2}   }[/tex] 

Lisa takes a loan for $ 5000 from the bank. Every month the bank charges her 1 % interest on the
money she owes and adds this amount to her outstanding balance. If Larissa never makes a
payment, how much will she owe the bank after 1.5 years?

Answers

Answer 900

Step-by-step explanation:1% of 5000 is 50 1.5 years is 18 months 50 times 18 is 900

For the following equation, write two more equations, using
:-11 + x=7
Type your answer here...

Answers

Answer: 88

Step-by-step explanation:

you divied and add

88 gotta divide and add

equation for horizontal line at 0,-7

Answers

y=-7

there’s no slope so there’s no x

it’s just the y intercept which is -7

Which fraction model best represents 3 2/6??

Answers

Answer:

A

Step-by-step explanation:

3x 2/6 is 1 and if you put all the shaded blocks together for A, you will get 1 whole

Which equation represents a line that is a perpendicular bisector to the line joining the points A(3,-4) and B( 5 , -2)?
1. y +4 = -1(x -3)
2. y + 3 = -1(x - 4)
3. y -1 = 3(x - 4)
4. x + y = -1

Answers

Answer is third......

PLEASE HELP!!!!!!!!!!!!
Monique and Tyrel were born on the same day. On the day they turned one year
old, Monique’s parents opened a savings account for her that earned 10% interest
per year. Starting that day, Monique’s parents put $100 in her account every
year on her birthday, stopping just after she turned six. After that, the money
remained in the account but Monique’s parents did not put in any more money.
Tyrel’s parents opened a similar savings account for him, however it wasn’t until
the day he turned six years old. Starting that day, his parents put $100 in his
account each year on his birthday, earning 10% interest per year.
Complete the two given tables to find the total amount of money in Monique’s
and Tyrel’s savings accounts. Who had the better saving strategy over 15 years?
For simplicity, round the interest to the nearest dollar for each year.

Answers

Answer:

i want the answer to

Step-by-step explanation:

Ms. Anderson deposits $7,000 into a savings account that pays a simple interest of 2% per year. Which of the following would be the total amount in her savings account at the end of 3 years?

Answers

Answer:

$7,428.46

Step-by-step explanation:

A = 7000(1 + .02)³

A = 7000(1.02)³

A = 7000(1.0612)

A = $7,428.46

Question 5

Maria can bake 35 cookies in of an hour. How many cookies can
she make in 4 hours?

Answers

Answer:

140

Step-by-step explanation:

just mutiply 35 by 4, thats h0w i g0t it anyways, h0pe this helped :)

Answer:

its 140 in 4 hours

Step-by-step explanation:

hope this helps!

PLEASE HELP ILL GIVE BRAINSLIEST OUT :D

Answers

Answer:

first 2.55 Miles

3.4 times 0.75

Step-by-step explanation:

second answer in the picture

Question 2
A stereo that regularly costs $429.99 is on sale for 35% off. How much money will be discounted from the regular price? (Round to the nearest hundredth)
Your answer:
$35
$150.50
$394.99

Answers

Answer:

$150.50.

Step-by-step explanation:

The full price of the stereo is 429.99 which is 100%, the sale is 35%.

100 - 35 = 65%

100% = 429.99

1% = 429.99 ÷ 100 = 4.2999

35% =4.2999 x 35 = 150.4996

Estimated to 150.50

The sum
of three consecutive integers is - 126. What are the integers?

Answers

Let the three consecutive integers be x , x+1 ,x+2
Given, sum of three consecutive integers = -126
x +x+1+ x+2 = -126
3x +3 = -126
3x = -126 -3
3x = -129
x = -129/3
x = - 43
x +1 = -42
x +2 = -41

Thomas has constant speeds for both running and walking. When a down-escalator is moving, Thomas can run down it in
15
seconds or walk down it in
30
seconds. One day, when the escalator was broken (and stationary), it took Thomas
20
seconds to run down it.

How long, in seconds, would it take Thomas to walk down the broken escalator?

Answers

I got 40

since 15x2=30

so then 20x2= 40

35 seconds or 40 seconds


I bought a new shirt last night that costs 46$. Becasue there was a little stain on it they gave me an 8% discount. How much did i
pay for the shirt

Answers

answer: $42.32

8% = 0.08

0.08 x 46 = 3.68

46 - 3.68 = 42.32

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