All categories

3 years ago

Factor by grouping:

2 answers:

3 0

$(x-y)^2=x^2-2xy+y^2\\---------------------------\\\\4-12r+9r^2=2^2-2\cdot2\cdot3r+(3r)^2=(2-3r)^2$

$other\ method:\\\\4-12r+9r^2=4-6r-6r+9r^2=2(2-3r)-3r(2-3r)\\\\=(2-3r)(2-3r)=(2-3r)^2$

faust18 [17]3 years ago

3 0

Because:
$(a-b)^2=a^2+2ab+b^2$

You might be interested in

Find the value of a from the following data whose mean is 23 29,33, 27, a, 19, 17, 10

ollegr [7]

Answer:

a = 26

Step-by-step explanation:

29 + 33 + 27 + a + 19 + 17 + 10 / 7 = 23

135 + a / 7 = 23

135 + a = 161

a = 26

5 0

2 years ago

The calculation of property tax is based on the

arlik [135]

<span>( Property Value x Assessment Rate) - Exemptions ) x Property Tax Rate = Tax Bill I think this is the answer I'm not for sure </span>

7 0

3 years ago

Please please please help me I need it within 10 minutes!

Alja [10]

Mr Green- Brown tie
Mr Black- Green tie
Mr. Brown- Black tie

I'm working on 6

Hope this helps in the meantime :)

5 0

3 years ago

The sequence {an) is defined by ao = 1 and

otez555 [7]

<h3>Answer: 31</h3>

=======================================

Work Shown:

Use the value of a0 to find the value of a1. The idea is you double the previous value, and then add 1.

$a_{n+1} = 2*(a_n) + 1\\\\a_{0+1} = 2*(a_0) + 1\\\\a_{1} = 2*(1) + 1\\\\a_{1} = 3\\\\$

Which is then used to find the value of a2. Follow the same process as before (double the previous value and then add 1).

$a_{n+1} = 2*(a_n) + 1\\\\a_{1+1} = 2*(a_1) + 1\\\\a_{2} = 2*(3) + 1\\\\a_{2} = 7\\\\$

This is used to find a3

$a_{n+1} = 2*(a_n) + 1\\\\a_{2+1} = 2*(a_2) + 1\\\\a_{3} = 2*(7) + 1\\\\a_{3} = 15\\\\$

Finally we can now find a4

$a_{n+1} = 2*(a_n) + 1\\\\a_{3+1} = 2*(a_3) + 1\\\\a_{4} = 2*(15) + 1\\\\a_{4} = 31\\\\$

Recursive sequences like this aren't too bad if n is small, but as n gets larger, things become more tedious. For those cases, its best to try to find a closed form equation. If not, then the next best thing is using a spreadsheet to automate the process.

6 0

3 years ago

Convert 10.5 feet/sec to yards/ mins

Lapatulllka [165]

the answer is 210 yards/ min.

Hope this helps!

3 0

4 years ago

Read 2 more answers