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
Finger [1]
3 years ago
9

Use the FOIL Method to find (k+5)(k−1).

Mathematics
2 answers:
romanna [79]3 years ago
8 0
The answer would be k^2 + 4K -5
Elenna [48]3 years ago
4 0

Answer:

(k+5)(k−1)=k2+4k−5

Step-by-step explanation

You might be interested in
If 2(4x + 3)/(x - 3)(x + 7) = a/x - 3 + b/x + 7, find the values of a and b.
zmey [24]

Answer:

a=3 and b=5.

Step-by-step explanation:

So I believe the problem is this:

\frac{2(4x+3)}{x-3}(x+7)}=\frac{a}{x-3}+\frac{b}{x+7}

where we are asked to find values for a and b such that the equation holds for any x in the equation's domain.

So I'm actually going to get rid of any domain restrictions by multiplying both sides by (x-3)(x+7).

In other words this will clear the fractions.

\frac{2(4x+3)}{x-3}(x+7)}\cdot(x-3)(x+7)=\frac{a}{x-3}\cdot(x-3)(x+7)+\frac{b}{x+7}(x-3)(x+7)

2(4x+3)=a(x+7)+b(x-3)

As you can see there was some cancellation.

I'm going to plug in -7 for x because x+7 becomes 0 then.

2(4\cdot -7+3)=a(-7+7)+b(-7-3)

2(-28+3)=a(0)+b(-10)

2(-25)=0-10b

-50=-10b

Divide both sides by -10:

\frac{-50}{-10}=b

5=b

Now we have:

2(4x+3)=a(x+7)+b(x-3) with b=5

I notice that x-3 is 0 when x=3. So I'm going to replace x with 3.

2(4\cdot 3+3)=a(3+7)+b(3-3)

2(12+3)=a(10)+b(0)

2(15)=10a+0

30=10a

Divide both sides by 10:

\frac{30}{10}=a

3=a

So a=3 and b=5.

4 0
2 years ago
Read 2 more answers
Please help! This is for Algebra 1
kow [346]
The first answer
-40y3/x5
8 0
3 years ago
Zoey purchased a new car in 1992 for \$28,000$28,000. The value of the car has been depreciating exponentially at a constant rat
elena-s [515]
400$
Explanation:
In 1992, the price is 28000$ and 9600$ in 1996 so in 4 years the value the car lost is 18400$
Dividing 18400 by 4 years we get 4600 depreciation value per year.
Between 1996 and 1998 there is 2 years
So in 1998 the value of the car will be:
9600 (value in 1996) - 2x4600 = 400$
3 0
3 years ago
Read 2 more answers
A 13 foot board is cut into 2 pieces, if one piece is x feet long express the other length in terms x
pychu [463]

Answer:

if they are equal then it would be 6.5

7 0
2 years ago
can some one plz answer my qwestion it is peter weighs 105 kg he want to lose 500 grams per week how many weeks willit take for
svet-max [94.6K]

Answer:

Your answer is he’s going to die out of Obesity

Step-by-step explanation:

8 0
3 years ago
Other questions:
  • Simplify completely quantity 2 x minus 24 over 8.
    7·2 answers
  • Find the solution to the system of equations y=x-4 and y=4x+2
    15·2 answers
  • If 2/3n= -12 what is the value of n=​
    10·2 answers
  • Decimal rational number between 1/4 and 1/5​
    7·1 answer
  • How do I convert 39/300 to decimal form, and what is the answer in decimal?<br> Thanks.
    6·2 answers
  • Round 4.60675917175 to the nearest thousandth
    6·2 answers
  • f there are 26 students in each third-grade class and 3 third-grade classes in the school, how many students will attend an asse
    6·1 answer
  • 1/4 divided by 3 1/2
    10·2 answers
  • Simplify: √18 - √24 + √54
    8·2 answers
  • Help me please please please
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!