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MA_775_DIABLO [31]
3 years ago
9

Given f(x)=2x^2+9x+k, and the remainder when f(x) is divided x+7 is 32, then what is the value of k?

Mathematics
1 answer:
sweet-ann [11.9K]3 years ago
6 0

Set up either long division or synthetic div.  I'd do the latter.

Your divisor for synth. div. should be -7.

                           __________  
Then              -7 /  2      9      k
                                    -14   +35
                          --------------------
                             2      -5      k+35                 Rem is 32; 
                                                                     Let 32 = k + 5 and solve for k:

                                                                           k = -3.

Let's check that.  Is k correct?

Then              -7 /  2      9      -3
                                    -14   +35
                          --------------------
                             2      -5      -3+35  = 32

Since the rem is 32, we are correct; k = -3.  
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Answer:

4 . The answer is no .

5 . x=1

6. unlimited answers

7. There's no answer to this question .

Step-by-step explanation:

___________________

4. solution :

-20(2-4) = 2((5×-4) -4) =

-40 = -48 × impossible

___________________

5. solution :

-3+4x+12x+24 = 28x +12-3

-3+24-12+3=28x-12x-4x

27-15=12 = 2x - 16x =12x

12 = 12x

x =1

__________________

6. solution :

24-3x+9-6 = -8x+20+5x+7

8x-5x-3x = -24-9+6+20+7

0=0

x can be every number you think because they are always equal to each other .

examination :

if you consider x as 1 :

24-3+9-6=-8+20+5+7

24=24

or if you consider x as 2 :

24-6+9-6 = -16+20+10+7

21 = 21

__________________

7 . solution :

3(x-2) = 3x+4

3x-6 = 3x+4

3x-3x = 10

0 = 10

if you consider x as 1 :

3-6 = 3+4

-3 = 7 × impossible .

4 0
3 years ago
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Answer: 1) If we talk about whole numbers then we should choose only square numbers that could be the area of square so that if we want to find its  side so we a can find its square root i.e. side.

2) We can find the square root of the area of the given square to find the side length of the square.

3) No , it is not possible to find a side length that would be perfect for a square with an area of 45 square units because if we find its side we need to find its square root i.e.

side=\sqrt{45}=\sqrt{3\times3\times5}=3 \sqrt{5}................>which is irrational and √5=2.236

∴side=3×2.236=6.708 unit ......> which is not accurate we need to take approx value of it to get the side length of the square.



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3 years ago
The cost of setting the type for a pamphlet is $15 and the cost of paper and printing is 25 cents per copy .How much will it cos
kari74 [83]

Answer:

$65

Step-by-step explanation:

It has a fee of $15. If each copy is $.25 each and 200 copies are wanted, multiply them together to get 50. Add 50 and 15 to get 65. It cost $65 for 200 copies.

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Answer:5

Step-by-step explanation:

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Write an equivalent series with the index of summation beginning at n = 1. ∞ (−1)n + 1(n + 1)xn n = 0
kkurt [141]

Looks like the starting series is

\displaystyle\sum_{n=0}^\infty\left((-1)^n+1\right)(n+1)x^n

Note the degree of the first few terms in the series, for n=0,1,2, are x^0,x^1,x^2, and so on.

So if the series were to start at n=1, we would need to preserve that pattern, and we do that by replacing n with n-1:

\displaystyle\sum_{n=1}^\infty\left((-1)^{n-1}+1\right)(n-1+1)x^{n-1}

Simplifying a bit, we end up with

\displaystyle\sum_{n=1}^\infty\left(1-(-1)^n\right)nx^{n-1}

7 0
3 years ago
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