1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Phantasy [73]
3 years ago
6

Use FOIL to multiply the two binomials. (b + 3)(b – 9)

Mathematics
2 answers:
Novosadov [1.4K]3 years ago
6 0
Take your (b+3)(b-9) and assign the letters of FOIL to them using the following:

F: First
For this, you are going to multiply the first quantity from each part of the binomial.
The first quantity from (b+3) is b, and the first quantity from (b-9) is also b, so multiplying them gives us: b x b = b^2

I: Inside
For this, you are going to multiply the inside quantity from each part of the binomial.
Look at (b+3)(b-9) and think of which quantities would be characterized as the 'inside' of the binomial. You should get 3 from (b+3) and b from (b-9), as those are the inside quantities.
Multiplying them gives us: 3 x b = 3b.

O: Outside
For this, you are going to multiply the outside quantity from each part of the binomial.
Look at (b+3)(b-9) and think of which quantities would be characterized as the 'outside' of the binomial. You should get b from (b+3) and -9 from (b-9), as those are the outside quantities.
Multiplying them gives us: b x -9 = -9b

L: Last
For this, you are going to multiply the last quantity from each part of the binomial. The last quantity from (b+3) is 3 and the last quantity from (b-9) is -9.
Multiplying them gives us: 3 x -9 = -27

Simply add each answer together to get the final equation:
b^2 + 3b - 9b - 27
Simplifying further gives us:
b^2 - 6b - 27
OlgaM077 [116]3 years ago
4 0
(b+3)(b-9)
b*b-9b+3b-27
b^2  -6b-27
You might be interested in
Accrotime is a manufacturer of quartz crystal watches. Accrotime researchers have shown that the watches have an average life of
kirza4 [7]

Answer:

a

   P(X <  24 )=  21.186\%  

b

    x =  19.78 \  months

Step-by-step explanation:

From the question we are told that

 The mean is   \mu  =  26 \  months

 The standard deviation is  \sigma  =  4 \  months

 Generally 2 year is  equal to  24 months

Generally the percentage of total production will the company expect to replace is mathematically represented as

      P(X <  24 )=  P(\frac{X - \mu }{ \sigma} <  \frac{24 - 26}{4}  )

Generally  \frac{X - \mu}{\sigma } =Z (The  \ standardized \  value  \  of  \  X )

     P(X <  24 )=  P(Z <  -0.8  )

Generally from the z-table  

       P(Z <  -0.8) =  0.21186

So

       P(X <  24 )=  0.21186

Converting to percentage

      P(X <  24 )=  0.21186  * 100

=>    P(X <  24 )=  21.186\%  

Generally the duration that should be the guarantee period if  Accrotime does not want to make refunds on more than 6% is mathematically evaluated as

    P(X <  x) =  P(\frac{X - \mu }{\sigma}  < \frac{x - 26}{4} )= 0.06

=> P(X <  x) =  P(Z < \frac{x - 26}{4} )= 0.06

From the normal distribution table the z-score for  0.06 at the lower tail  is

       z = -1.555

So

    \frac{x - 26}{4} = -1.555

=> x =  19.78 \  months  

7 0
3 years ago
2/3 (×-7)= -2 solve for y​
TiliK225 [7]

Answer:

y= 14

Step-by-step explanation:

4 0
3 years ago
What is 13/2 - 2/13.
skad [1K]
13/2 = 6.5
2/13 = 015
6.5-0.15 = 6.35
4 0
3 years ago
Function? {(10, 20), (11, 22), (11, 24), (13, 26)} ​
Dmitry [639]

Answer:

The relation is not a function.

Step-by-step explanation:

6 0
3 years ago
Read 2 more answers
-4x+5y-3-11x-y<br><br> Does -3 have a like term?
-BARSIC- [3]

Answer:

nope ❎ ❎ ❎ ❎ ❎ ❎ ❎ ❎

5 0
3 years ago
Read 2 more answers
Other questions:
  • Mrs. Kelly creates a garden. She buys 15 flowers and 3 bushes for a total cost of $160.32. Each bush costs $11.50 more than each
    13·1 answer
  • In 1955 an antique car that originally cost $3,668 is valued today at $62,125 if in excellent condition, which is 1 3/4 times as
    5·1 answer
  • Finding in a rational number between which given pair of numbers supports the idea that a rational numbers are dense in real num
    10·2 answers
  • 3) Oceanside Bike Rental Shop charges fourteen dollars plus seven dollars an
    12·1 answer
  • 7x + 2 = -19 (b) 3x - 1/3 = 5 (c) 5x - 4 = 21 (d) -7x = 21 (e) 18 - 7x = -3 (f) 3(x + 4) = 21 (g) 3x - 9 = 5x - 3 (h) 4x + 6 - 7
    10·1 answer
  • How do you solve 70 -7•7
    15·2 answers
  • A wheelchair ramp that is constructed to rise 1 foot off the ground must extend 12 feet along the ground. How long will the whee
    5·1 answer
  • 1/4(8x-4)=<br> need help please answer
    13·1 answer
  • Find the 11th term in the following geometric sequence.<br> -5,-10,-20,-40
    5·1 answer
  • Find the area of the shaded region 6cm 150°
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!