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3 years ago

What is not an acceptable form of proof

Mathematics

1 answer:

STALIN [3.7K]3 years ago

4 0

No reason, or no evidence to support your claim/proof

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Question 8

sasho [114]

we are given

system of equations

First equation is

$3x-2y=31$

Second equation is

$3x+2y=-1$

now, we can find augmented matrix

$A=\begin{pmatrix}3&-2&31\\ 3&2&-1\end{pmatrix}$

now, we can change it into reduced row echelon form

step-1: multiply the 1st row by 1/3

$A=\begin{pmatrix}1&-2/3&31/3\\ 3&2&-1\end{pmatrix}$

step-2:add -3 times the 1st row to the 2nd row

$A=\begin{pmatrix}1&-2/3&31/3\\ 0&4&-32\end{pmatrix}$

step-3:multiply the 2nd row by 1/4

$A=\begin{pmatrix}1&-2/3&31/3\\ 0&1&-8\end{pmatrix}$

step-4: add 2/3 times the 2nd row to the 1st row

$A=\begin{pmatrix}1&0&5\\ 0&1&-8\end{pmatrix}$

so, we get

$x=5,y=-8$

Answer is (5,-8)

6 0

3 years ago

Read 2 more answers

The slope of this graph is?

AURORKA [14]

The slope of the graph is -1/2 using the rise over run method it rises up one and too the left twice so it would he -1/2

3 0

2 years ago

Read 2 more answers

According to the United Nations, in the year 2002, the population of the world was 6.1 billion people and was growing at an annu

zmey [24]

Answer:

(a) 6.2843 billion

(b) 6.8716 billion

Step-by-step explanation:

Since there is a constant growth rate of 1.5% per year, and the population in 2002 was 6.1 billion people. The general equation for the total world population, in billions, after 2002 is:

$P(t) = 6.1*(1+0.015)^t$

With t being the time, in years, after 2002.

a) What was the population in 2004?

$t=2004-2002=2\\P(2) = 6.1*(1.015)^2\\P(2) = 6.2843 \ billion$

b) What was the population in 2010?

$t=2010-2002=8\\P(8) = 6.1*(1.015)^8\\P(8) = 6.8716 \ billion$

3 0

2 years ago

Solve. 5x+10+7x=-3+13+7x+12

bixtya [17]

For this problem, we can move all the X's to one side and all the regular numbers to the other.

7x comes over and become -7x

10 goes over and becomes -10.

5x+7x-7x=-3-10+13+12.

-3-10=-13, which cancels out the positive 13.

-7x+7x=0 which cancels each other out.

Now, 5x=12

Divide each side by 5.

x=2.4 <--- final answer.

4 0

2 years ago

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What is the answer to the problem

Ber [7]

The answer is A. Good luck

7 0

2 years ago