Mathematics High School

1. x² - 1 + y(y - 2x)​





somebody plz help meeeeeeeeeeeeeeeeeeeeeee

Answers

Answer 1


Step1:Multiply each term in the parentheses by y.


Step2: calculate the product
1. X - 1 + Y(y - 2x)somebody Plz Help Meeeeeeeeeeeeeeeeeeeeeee
Answer 2

Answer:

[tex] {(x + y)}^{2} - 1[/tex]

Step-by-step explanation:

[tex] {x}^{2} + y(y - 2x) - 1[/tex]

[tex] {x}^{2} + {y}^{2} - 2xy - 1[/tex]

Using the identity (a - b)^2 here ,

[tex] {(x + y)}^{2} - 1[/tex]

Related Questions

If m=2 and n=4 Then what m+m?

Answers

Answer:

4

Step-by-step explanation:

The answer is 4 because if m = 2 then 2 + 2 = 4

What is the mean for the data set, to the nearest whole number? 8.5 10 8 9 I need help

Answers

Answer:

9

Step-by-step explanation:

Add the numbers together and then divide by how many numbers there are.

Answer:

you need to show it

Step-by-step explanation:

a cylindrical tank of radius 2.5m and height 1.6m initially contains water of depth of 20cm .water is pumped into the tank at the rate of 1.35litres per second.giving your answer in the nearest minute calculate the time in hours and minute it takes to fill the tank​

Answers

20cm=0.2m
1.6m-0.2m=1.4m
radius=2.5, area of circle=19.635m^2
19.635m^2x1.4m=27.489m^3
1litre=0.001m^3
1.35litres=0.00135m^3
27.489^3/0.00135m^3=20362s
60s=1min
20362s/60s=339.37min
=5 hours and 39 minutes
(intermediate steps are left in 5s.f.)
hope this helps

Tell whether (-3, 3) is a solution of the system.​

Answers

Answer:

the answer to that would be 0.

Step-by-step explanation:

What is the common multiplier in the proportion? 6 over 8 = 9 over 12​

Answers

Answer:

The common multiplier is 24

Step-by-step explanation:

6/8 9/12

8,16,24

12,24

6/8 × 3/3= 18/24

9/12× 2/2= 18/24

Can someone help me??

Answers

Answer:

C

Step-by-step explanation:

−√57 is -7.54983443 repeating but rounded is -7.5 which is smack dab in the middle of integers (numbers) of -7 and -8.

Simplify 12¹⁶/12⁴ .​

Answers

[tex]12^{12}[/tex]

subtract 4 from 16.

There are 9 boys and 6 girls in a hall, each holding coins in their hand. The mean number of coins for the children is 18 The mean number of coins for the boys is 14 Work out the mean number of coins for the girls.

Answers

Answer:

24

Step-by-step explanation:

Average = total number of coins / number of students

If the mean number of coins with boys is 14, the total number of coins held by boys =  14 x 9 = 126

The total number of coins held by the students = total number of children x average number of coins held by the children

15 x 18 = 270

The total number of coins held by girls = 270 - 126 =144

The mean  number of coins for the girls = 144 / 6 = 24

3x-2=7????????????????



Answers

Answer:

x=3

Step-by-step explanation:

Step 1: Add two to 7 and inverse the minus 2

3x=7+2 3x=9

Step 2: Divide each number by 3.

3x/3=x and 9/3=3

so x=3

Find the least common multiple of 45 and 120

Answers

Answer:

[tex] \boxed{ \bold{ \huge{ \boxed{ \sf{360}}}}}[/tex]

Step-by-step explanation:

Steps for finding L.C.M of the given numbers :

[tex] \star[/tex] First of all find the prime factors of each numbers.

[tex] \star[/tex] Take out the common prime factors.

[tex] \star[/tex] Also take out the remaining prime factors.

[tex] \star[/tex] Multiply those all prime factors and obtain L.C.M. If there is not any common prime factors then their L.C.M is the product of the given numbers.

Now,let's find the least common multiple ( L.C.M ) of 45 and 120 following those steps :

prime factors of 45 = 3 × 3 × 5

prime factors of 120 = 2 × 2 × 2 × 3 × 5

Common prime factors= 3 and 5

Remaining prime factors = 2 , 2 , 2 and 3

Multiply all the prime factors to obtain L.C.M

[tex] \dashrightarrow{ \sf{3 \times 5 \times 3 \times 2 \times 2 \times 2}}[/tex]

[tex] \dashrightarrow{ \boxed{ \sf{360}}}[/tex]

Hope I helped!

Best regards! :D


The figure below shows how Ali spends his time in a day. Calculate the number of hours Ali
spends on playing. ​

Answers

Answer:

 75°C = 5h

Step-by-step explanation :

1. Make sure your mind is fresh and that you understand each step before reading

2. 24 hours is equal to  360°C

3.  so now lets break up the hours. We can do this by choosing a simple degree that was given in the diagram. For example "Watching tv".

Tip : when choosing one of the degrees , ( i mean one of the choices like watching tv, playing and sleeping) , try choosing the simplest one , which has a simple number and a multiple of 360.

so now you want to know how many hours is 60 equal to .

= 360 ÷ 60 = 60   (this is to make sure the number is a multiple and will not be a decimal )

= 24 ÷ 6 = 4

this means Ali spend 4 hours watching tv

and by doubling that you get                    60°C = 4h

the amount of time he slept                     120°C = 8h

and you keep playing with the numbers like that

so for playing                                                

                                                                   60°C = 4h

                                             divide by 4    15°C =  1h

                                           × by 5             75°C = 5h

this means ali spends 5h playing , 8h sleeping, 4h watching tv and 7 h studding

Which of the following are all multiples of 9 less than 50? 9, 18, 27, 36, 45 1, 2, 5, 10, 25, 50 9, 18, 27, 36, 45, 54 1, 3, 3, 9

Answers

9, 18 ,36, 45 are all multiples of 9

Answer:

18 ,36, 45

Step-by-step explanation:

Nathan and his friends want to see the new movie, The Case of the Secret Doorway. It's a popular movie, so Nathan buys their tickets in advance. He spends $36.75 in all to buy 3 tickets. How much does each friend need to pay him back?

Answers

Answer:

  $12.25

Step-by-step explanation:

Each of the 3 tickets costs 1/3 of the total:

  (1/3)($36.75) = $12.25

Each friend needs to pay Nathan $12.25 for a ticket.

HELP PLEASE ! Due tonight Part 4

Answers

If it were me I’d rather be given y=mx+b because you don’t have to use the graph to calculate slope, you just know that m=slope in the equation

Mason sold 10 wristbands and made a total of 5 dollars. What is the unit rate?

Answers

Answer:

10 = 5x

5/10

x =1/2

unit rate is equal to 0.50

Step-by-step explanation:

The answers is .50 cents per wristband

Emily owns 10.2 shares of stock in a company. On Friday, the stock dropped by $1.35/share. What was the total change in value of Emily’s stock? −$13.77 −$7.56 +$7.56 +$13.77

Answers

Answer:

answer is +$7.56

Step-by-step explanation:

I guess I was help full for u

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Ms. Cody needs 1.75 yards of fabric to make one pillow. How many yards of fabric will she
need to make 12 pillows? 7.3a
A
12 yards
B
12 yards
С
21 yards
D
21 yards

Answers

Answer:

21 yards

Step-by-step explanation:

12 pillows x 1.75 yards= 21

21 yards of  fabric would be needed to make 12 pillows

Answer:

Im pretty sure its supposed to be 21 yards

Step-by-step explanation:

1 pillow is 1.75

12 pillows is 12×1.75=21

so she’ll need 21 yards of fabric for 12 pillows

J is the midpoint of CT
T
If:
CJ = 4x - 9 and
JT = 9x – 34
Find CT.

Answers

Answer:

Step-by-step explanation:

4x - 9 = 9x - 34

-5x - 9 = -34

-5x = -25

x = 5

4(5) - 9 + 9(5) - 34

20 - 9 + 45 - 34

11 + 11 = 22

The value of CT such that J is the midpoint of CT will be 22.

What is a number system?

The number system is a way to represent or express numbers.

A decimal number is a very common number that we use frequently.

Since the decimal number system employs ten digits from 0 to 9, it has a base of 10.

As per the given,

J is the midpoint of CT

CJ = JT

4x - 9 = 9x - 34

-9 + 34 = 9x - 4x

25 = 5x

x = 5

So CT = 2(CJ) = 2(4 x 5 - 9) = 22

Hence "The value of CT such that J is the midpoint of CT will be 22".

For more about the number system,

https://brainly.com/question/22046046

#SPJ5

Please answer step by step 3(2y-7)=

Answers

Answer:

Step-by-step explanation:

3(2y-7)=

Distribute

3 * 2y - 3 *7

6y - 21

Step-by-step explanation:

3(2y-7) = 6y-21

y = 21/6

y = 3

What is the slope of the line that passes though the points:
(10,-2), (10,3)

Answers

Answer:

Undefined

Step-by-step explanation:

Evaluate the expression 9(a + 2b) + c for a = -3, b = -2, and c = 1.

A. -62
B.-91
C. 46
D. 64

it’s due by 11:59 PM on wednesday

Answers

If you sun in the numbers you get
9(-3+2x-2)+1

Working within the parenthesis first, you can simplify to
(-3-4)

Then to
(-7)

Now we have
9(-7)+1

Next you multiple 9 by -7

This gives you -63+1

So the answer is -62 or A

Pam received $125 for graduation and spend $8 of it a week. How many weeks can she do this
and still have more than $20 left?

Answers

Answer:

13 weeks

Step-by-step explanation:

8×13=104

125-104=21$

Does anyone know the answer to any of these? Please I need help. Real bad!

Answers

Answer:the first one is x=87

The second one is x =8

Step-by-step explanation

If 3x + 2 = 6, what is the value of x?

Answers

Answer:

x = [tex]\frac{4}{3}[/tex]

Step-by-step explanation:

Given

3x + 2 = 6 ( subtract 2 from both sides )

3x = 4 ( divide both sides by 3 )

x = [tex]\frac{4}{3}[/tex]

Answer:

[tex] \boxed{ \bold{ \huge{ \boxed{ \sf{x = 1.33}}}}}[/tex]

Step-by-step explanation:

[tex] \star \sf \: \: {3x + 2 = 6}[/tex]

[tex] \text{ \sf{ Step 1}}[/tex] : Move 2 to right hand side and change it's sign

[tex] \longmapsto{ \sf{3x = 6 - 2}}[/tex]

[tex] \text{ \sf{  Step \: 2 \: }}[/tex] : Subtract 2 from 6

[tex] \longmapsto{ \sf{3x = 4}}[/tex]

[tex] \text{ \sf{ Step \: 3}}[/tex] : Divide both sides by 3

[tex] \longmapsto{ \sf{ \frac{3x}{3} = \frac{4}{3} }}[/tex]

[tex] \text{ \sf{ Step \: 4 \: }}[/tex] : Calculate

[tex] \longmapsto{ \sf{x = 1.33}}[/tex]

The value of x is 1.33

Hope I helped!

Best regards! :D

~TheAnimeGirl


HELP!!!!
It was saying that my question is to short so I am just writing this to make it longer! and Thank you to the person who answers my question I do appreciate you taking time out of your day to help me!

Answers

What’s there question??

find the perimeter .

Answers

Answer:

61& 7/20

Step-by-step explanation:

Scientific Notation
7.28 x 10^10

Answers

Answer:

72800000000

Step-by-step explanation:

7.28 * 10^10 = 72800000000

Answer:

7.28 × 10^10 = 72800000000..

If this answer helps you plz mark as brainlist..

PLEASEEEE HELPPPP


Add. 3+(-7)=
​

Answers

Answer:

Step-by-step explanation:

It’s exactly like saying -7 + 3.. -7 is the bigger number so you take away from that the answer is -4

Answer:

-4

Step-by-step explanation:

Remove Parentheses

3-7

Subtract

3-7 = -4

Answer

-4

Hope this helped

Brainliest is appreciated/

Find the value of the expression: (3 · 100)^4

Answers

Answer:

Using trigonometric identities.

8,100,000,000

Step-by-step explanation:

Answer:

8,100,000,000

Step-by-step explanation:

Following the order of operations, expressions in parentheses must be evaluated before exponents, thus:

[tex](3 * 100)^4 \\= (300)^4 &\\&= 300*300*300*300 \\&= 8,100,000,000\ or \ 8.1 * 10^9[/tex]

If g(x-1) = (2-g(x))/8 and g(1) = 3, find the value of g(2).

Answers

Answer:

-22

Step-by-step explanation:

g(2-1)=g(1)=(2-g(2))/8=3

2-g(2)=24

-g(2)=22

g(2)=-22

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