pls helppppp if you know math

Answer:

Both A and B are true identities

Step-by-step explanation:

A. N ( n − 2 ) ( n + 2 ) = n 3 − 4 n

We need to show that (left-hand-side)L.H.S = R.H.S (right-hand-side)

So,

 n ( n − 2 ) ( n + 2 ) = n(n² - 2²)     (difference of two squares)

                               = n³ - 2²n       (expanding the brackets)

                               = n³ - 4n         (simplifying)

So,                L.H.S  = R.H.S

B. ( x + 1 )² − 2x + y² = x² + y² + 1

We need to show that (left-hand-side)L.H.S = R.H.S (right-hand-side)

So,

( x + 1 )² − 2x + y² = x² + 2x + 1 - 2x + y²   (expanding the brackets)

                             = x² + 2x - 2x + 1  + y²   (collecting like terms)

                             = x² + 1 + y²        

                             = x² + y² + 1                    (re-arranging)

So,              L.H.S  = R.H.S

So, both A and B are true identities since we have been able to show that L.H.S  = R.H.S in both situations.

Answer:

Answer would be D. $150

Step-by-step explanation:

If $500 is the amount invested at $3 simple interest, that would be $15 every year. Take 15 and times it by the 10 years, and that would be $150 for 10 years.

Therefore the answer is D, $150.

Hope this helped.

Answer:20.1 will be the temp

Step-by-step explanation:

All you do is add -3.9 and 24 together to get your answer

Answer:

Step-by-step explanation:

The common ratio is a constant found by dividing any term by the previous term.

10/30=1/3

103/10=10.3

Since those fractions are not equal this is NOT a geometric sequence.

no entiendo hingles......pero puedo puedo tener esos 5 puntos

Answer:

Step-by-step explanation:

The slope would be -1

Answer:

write a note or letter , or just be gutsy and... tell them face to face if it doesn't work out just say it was a joke or there a joke , I mean the worst would be like her socking u in the face. so‍♀️

Step-by-step explanation:

DO IT I BELIEVE IN YOU

Answer:

13

Step-by-step explanation:

radius of the circle​ (r) = √12²+5² = √169 = 13

Step-by-step explanation:

getcalc.com's fraction to decimal calculator to find what's an equivalent decimal for the fractional number 48/400.

50/400 0.125 12.5%

49/400 0.1225 12.25%

48/400 0.12 12%

47/400 0.1175 11.75%

Answer:

fraction to decimal calculator to find what's an equivalent decimal for the fractional number 48/400.

0.12 is a decimal and 12/100 or 12% is the percentage for 48/400.

Step-by-step explanation:

A fraction consists of two numbers and a fraction bar:

48/400

The number above the bar is the numerator: 48

The number below the bar is the denominator: 400

Divide the numerator by the denominator to get fraction's value:

Val = 48 ÷ 400

Introduction. Percent, p%

'Percent (%)' means 'out of one hundred':

p% = p 'out of one hundred',

p% = p/100 = p ÷ 100.

Calculate fraction's value.

Divide the numerator by the denominator to get fraction's value:

48/400 =

48 ÷ 400 =

0.12

Note:

100/100 = 100 ÷ 100 = 100% = 1

Multiply a number by the fraction 100/100,

... and its value doesn't change.

Calculate the percent value:

0.12 =

0.12 × 100/100 =

(0.12 × 100)/100 =

12/100 =

12%;

Answer:

x + y = 1042

1.50x + 0.75y = 1140

Step-by-step explanation:

If there was a total of 1,042 fares paid then x + y would be equal to that because x is the number of regular fares paid and y is the number of reduced fares paid.

If there was a total of $1,140 made from the fares then we can use 1.50x + 0.75y. We put the 1.5 in front of the x because each fare paid costs $1.50, same with Y each reduced fare paid is $0.75. So both of those need to be added up to get $1,140.

Answer:

16 cm

Step-by-step explanation:

(2*2)+4(1/2(2*3)

4+4(1/2(6)

4+4(3)

4+12

16 cm

Answer:

1. 2(3x−2)(2x−3)

2. 3(3x+1)(2x+5)

3. 2(4x+1)(2x−5)

4. 4(2x+1)(2x+7)

5. 5(3x+1)(2x−5)

6. 3(3x−7)(2x+1)

7. 3(5x+3)(3x−2)

8. 2(7x−2)(2x−5)

9. 2(7x−3)(2x−3)

10. 4(5x−11)(2x+1)

11. 5(x−2)(x+12)

12. (x−1)(x−8)

15. x=1 or x=4

Step-by-step explanation:

1. Factor 12x2−26x+12

12x2−26x+12

=2(3x−2)(2x−3)

2. 3(3x+1)(2x+5)

3. Factor 16x2−36x−10

16x2−36x−10

=2(4x+1)(2x−5)

4. Factor 16x2+64x+28

16x2+64x+28

=4(2x+1)(2x+7)

5. Factor 30x2−65x−25

30x2−65x−25

=5(3x+1)(2x−5)

6. Factor 18x2−33x−21

18x2−33x−21

=3(3x−7)(2x+1)

7. Factor 45x2−3x−18

45x2−3x−18

=3(5x+3)(3x−2)

8. Factor 28x2−78x+20

28x2−78x+20

=2(7x−2)(2x−5)

9. Factor 28x2−54x+18

28x2−54x+18

=2(7x−3)(2x−3)

10. Factor 40x2−68x−44

40x2−68x−44

=4(5x−11)(2x+1)

11. Factor 5x2+50x−120

5x2+50x−120

=5(x−2)(x+12)

12. Let's factor x2−9x+8

x2−9x+8

The middle number is -9 and the last number is 8.

Factoring means we want something like

(x+_)(x+_)

Which numbers go in the blanks?

We need two numbers that...

Add together to get -9

Multiply together to get 8

Can you think of the two numbers?

Try -1 and -8:

-1+-8 = -9

-1*-8 = 8

Fill in the blanks in

(x+_)(x+_)

with -1 and -8 to get...

(x-1)(x-8)

15. Let's solve your equation step-by-step.

(x−2)(x−3)=2

Step 1: Simplify both sides of the equation.

x2−5x+6=2

Step 2: Subtract 2 from both sides.

x2−5x+6−2=2−2

x2−5x+4=0

Step 3: Factor left side of equation.

(x−1)(x−4)=0

Step 4: Set factors equal to 0.

x−1=0 or x−4=0

x=1 or x=4

Sorry I wasn't able to do 13 and 14 but hope this helps! :)

Answer:

Orange rose = 2/9

Step-by-step explanation:

In order to find probability of picking one item, you add all the possible things you could choose. So, 3+2+4 equals a total of 9 outcomes, and that would be your denominator for your fraction of probability. From there it's really easy. Just put the amount of things your trying to find the probability for in the numerator spot.

Ex.

There are 9 total roses so that would be the denominator (?/9)

To find out the probability for picking an orange rose, you'd put the 2 in as the numerator because that is the total number of orange roses you have (2/?)

Then just put the two together (2/9).

Answer:

a) per year

Step-by-step explanation:

Hope this helped! Have a nice day! Plz mark as brainliest!!!

-XxDeathshotxX

Answer:

14

Step-by-step explanation:

Lets break it down.

5 1/4 = 5 2/8 = 42/8

So great now we have 42/8

42 divided by 3 (the amount of frosting needed)

You get 14

Jasmine can make 14 cupcakes

Hope it helps :)

Answer:

A

Step-by-step explanation:

If it loses 15% of its value every year, then each subsequent year will be worth 85% of the previous year. If we think of this as a geometric series, then the worth would be 8000(.85^t) where t is years after the first year. If you plug in 12, then it's 1137.93.

Answer:

1137.93 is the answer

Step-by-step explanation:

Answer:

4:7

Step-by-step explanation:

a:b:c=12:6:21

-7x+6

thats the answer have fun:)

Answer:

21

Step-by-step explanation:

na na jk 19

Answer:

eric = 15

chris 7

Step-by-step explanation:

Let the questions Chris answered correctly be represented by c

Let the questions Eric answered correctly be represented by e

They both got 22 questions right. This can be represented by this equation :

c + e = 22 --- eqn 1

Chris scored 8 less than Eric. This can be represented by this equation :

c = e - 8 --- eqn 2

Substitute for c in eqn 1  

e - 8 + e = 22 .

collect like terms

2e = 30

solve for e

e = 15

Substitute for e in eqn 2

c = 15 - 8 = 7

formula 50 + 10 + x = 180

Answer:

For the first question all u doing is removing the parenthesis

So answer is z to the third power

B is 9y to the 4th power

Answer:

if there both negatives it should only be one i believe. not sure though

Answer:

what's the word problem so I can assist you! (I used to take ixl classes too)

Answer:

no question

Step-by-step explanation:

what is the question

Answer:

Mean x¯¯¯ 5

Median x˜ 5

Mode 6

Range 6

Minimum 2

Maximum 8

Count n 10

Sum 50

Quartiles Quartiles:

Q1 --> 3

Q2 --> 5

Q3 --> 6

Interquartile

Range IQR 3

Step-by-step explanation: