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steposvetlana [31]
4 years ago
13

What times what equals 14 but if added togather gets you -13

Mathematics
2 answers:
valina [46]4 years ago
7 0
I don't think that there is anything that works with that.

1 - 14 = -13

But

1 x -14 = -14 

I honestly don't think there are numbers that work for that
ss7ja [257]4 years ago
5 0
Theres no number because 7x2=14 7+2=9 7-2=5 and 14x1=14 14+1=15 but if you put that into a negative 14 x -1=-14 14-1=-13 its impossible thiers no other way for it to multiply to 14 and add up to -13 i hope could explain your answer.  
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Estimate the minimum number of subintervals to approximate the value of Integral from negative 3 to 3 (2 x squared plus 9 )dx wi
vichka [17]

Answer:

The value of n for (a) n=425. (b) n=0.

Step-by-step explanation:

Given integration is,

\int_{-3}^{3}f(x)=\int_{-3}^{3}(2x^2+9)dx

(a) For Trapezoidal Rule : Composite error is,

E_T=-\frac{(b-a)^3}{12n^2}f''(x_m)

Where, f''(x_m)=greatest value of |f''(x)|= |4|=4, a=-3, b=3. Therefore to find the minimum number of subinterval,

|E_T|\leq | \frac{(b-a)^3}{12n^2}f''(x)||

\leq \frac{4(-3-3)^3}{12n^2}

=\frac{72}{n^2}

According to the question, we must choose n such that,

\frac{72}{n^2}

\implies n>424.2640686

So we can take n=425.

(b) For Simpson 1/3 rule : Composite error is,

E_S=-\frac{(b-a)^5}{180n^4}f^{(iv)}(x_m)

where, f^{(x_m)}=\textit{greatest value of} |f^{(iv)}(x)|

In this problem f^{(iv)}(x)=0, so that,

|E_S|\leq 0

that is there exist no error. So n=0.

6 0
3 years ago
I have to solve for ABC n round to nearest whole number​
Brums [2.3K]

Answer:

∠B

7(13)-1=90˚

Step-by-step explanation:

Are you saying ∠ABC or ABC as sides?

1. ∠ABC

(7x-1)+(4x+1)+(3x-2)=180˚

14x-2=180˚

14x=182

x=182/14

x=13˚

2. plug in

∠A

4(13)+1=53˚

∠B

7(13)-1=90˚

∠C

3(13)-2=37˚

6 0
3 years ago
Please answer only neeed solve questions​
Tju [1.3M]

Answer:

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Step-by-step explanation:

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