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damaskus [11]
3 years ago
13

Which of the following statements is true ​

Mathematics
1 answer:
Bad White [126]3 years ago
7 0
I think it’s B. But I’m not completely sure
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Please, please, please, please help
Alexeev081 [22]

Answer:

27

Step-by-step explanation:

6 0
3 years ago
Given that the expression 2x^3 + mx^2 + nx + c leaves the same remainder when divided by x -2 or by x+1 I prove that m+n =-6
Alla [95]

Given:

The expression is:

2x^3+mx^2+nx+c

It leaves the same remainder when divided by x -2 or by x+1.

To prove:

m+n=-6

Solution:

Remainder theorem: If a polynomial P(x) is divided by (x-c), thent he remainder is P(c).

Let the given polynomial is:

P(x)=2x^3+mx^2+nx+c

It leaves the same remainder when divided by x -2 or by x+1. By using remainder theorem, we can say that

P(2)=P(-1)              ...(i)

Substituting x=-1 in the given polynomial.

P(-1)=2(-1)^3+m(-1)^2+n(-1)+c

P(-1)=-2+m-n+c

Substituting x=2 in the given polynomial.

P(2)=2(2)^3+m(2)^2+n(2)+c

P(2)=2(8)+m(4)+2n+c

P(2)=16+4m+2n+c

Now, substitute the values of P(2) and P(-1) in (i), we get

16+4m+2n+c=-2+m-n+c

16+4m+2n+c+2-m+n-c=0

18+3m+3n=0

3m+3n=-18

Divide both sides by 3.

\dfrac{3m+3n}{3}=\dfrac{-18}{3}

m+n=-6

Hence proved.

7 0
3 years ago
Dentify as an increase or decrease. Then find the percent of increase or decrease. If necessary, round to the nearest percent.
love history [14]

Answer:

Step-by-step explanation:

The difference is 130-150 = -20, a decrease.

-20/150 ≅ -0.133, a decrease of 13.3%

4 0
3 years ago
Which of the equations below could be the equation of this parabola? A y = 1/6x2 B. x = -1/6y2 C. x = 1/6y2 D. y = -1/6x2
Schach [20]

Answer:

C

Step-by-step explanation:

assuming the 2s are all squares

just plot a point and it's negative

7 0
3 years ago
A $1,500 loan has an annual interest rate of 4 1/2 on the amount borrowed.how much time has elapsed if the interest is now $127.
Vadim26 [7]
Probably none of them except 156. 
6 0
3 years ago
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