MATHEMATICS HIGH SCHOOL

EXPAND it please and explain
(9r-s/7)(9r+s/7)

Answers

Answer 1

Answer:

2. 2

81r - s/49

Step-by-step explanation: I don’t know how to explain it but yeah

( I’m probably wrong so if I am I’m sorry)

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Answers

Answer:

Step-by-step explanation:

march

Answer:

D- March

Step-by-step explanation:

I took the quiz

Solve for the sum of 2ab2 and (-5ab2) is the same as the sum of (-6ab2) and____.

Answers

The problem ask to find the sum of the said polynomial equation and first of all, you must use the FOIL method in getting the sum of it, you should sum First, Outside, Inside and last and the answer 3ab2. I hope you are satisfied with my answer and feel free to ask for more

what is the value for the a variable and b variable?

Brandon buys a radio for 43.99 in a state where the sales tax is 7%

Answers

So then this is a simple multiplication problem. First, we need to make the percentage a decimal. To do that, we find out how many parts out of 100 it is. In this case it 7 parts, so we're making it the decimal .07. So the problem becomes 43.99x0.07. We multiply that, and come up with 3.0793. We'll round that to the hundredths place, and come up with 3.08. So on a radio that costs $43.99, you will pay $3.08 tax, bringing the total to $47.07.

43.99
Convert to a decimal. x .07
¯¯¯¯¯¯¯¯
3.0793
Add + 43.99
¯¯¯¯¯¯¯¯¯
47.0693
Round out. $47.07 is your answer

Find the 6th term in the expanded form of the equation (2x+y)^9

Answers

$T_r={n \choose r-1}a^(n-(r-1))b^(r-1)\n T_6={9 \choose 6-1}(2x)^(9-(6-1))y^(6-1)\n T_6={9 \choose 5}(2x)^4y^(5)\n T_6=(9!)/(5!4!)16x^4y^(5)\n T_6=(6\cdot7\cdot8\cdot9)/(2\cdot3\cdot4)16x^4y^(5)\n T_6=7\cdot2\cdot9\cdot16x^4y^(5)\n T_6=2016x^4y^5$

$Use\ the\ Pascal's\ Triangle\ (look\ at\ the\ picture)\n\n6-th\ term\ of\ (2x+y)^9\ is\n\n 126(2x)^4y^5=126*16x^4y^5=2016x^4y^5$

How many multiples of 9 are there between 100 and 2,000?

Answers

first of all, find the first number more than 100 that can divided by 9, and it's 108 (we'll call it as 'a') then, find the number less than 2000 that can divided by 9, it's 1.998 (we'll call it as 'Un')

Un = a + (n-1).b
1998 = 108 + (n-1).9
1998 = 108 + 9n -9
1899 = 9n
211 = n

and the total is
Sn = n/2 (a+un)
s211 = 211/2 (108+1998)
= 222.183

Please!! help me this is due today i will make you BRAINLIEST