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Ad libitum [116K]

2 years ago

9

How do we do Systems of Equation and then how do we label it as one solution, no solution, or infinitely many solutions.

2 answers:

RoseWind [281]2 years ago

5 0

To solve Systems of Equations you can use graphing, substitution, or by adding, subtraction, multiplying, or division methods. One solution is consistent and dependent. No solution is inconsistent. Infinitely many solutions is consistent and dependent.

melamori03 [73]2 years ago

3 0

For our class what I did was you can get the equation in slope-intercept form. Then plot the lines. If the lines meet then the point they meet at is the one solution. If they don't meet then there is no solution. If the equations are the same then there are infinite solutions. Before you comment with "that takes to long" like I know you will, I just did this for fun.<span />

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Write an expression that is equivalent to (3b+6) + 2

cluponka [151]

Since you're not multiplying, you can remove the parentheses.

3b+6+2

which gives you . ....

3b+8

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2 years ago

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I need the anwser and the fractions

alexandr1967 [171]

Answer:

5.5/3 - 3/1 = 2.5/3

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2 years ago

A group of statistics students decided to conduct a survey at their university to find the average (mean) amount of time student

Butoxors [25]

Answer: $(21.541,\ 23.059)$

Step-by-step explanation:

The confidence interval for population mean is given by :-

$\overline{x}\pm z_{\alpha/2}\dfrac{\sigma}{\sqrt{n}}$

Given : Sample size : $n=240$ , which is a large sample , so we apply z-test .

Sample mean : $\overline{x}=22.3$

Standard deviation : $\sigma= 6$

Significance level : $\alpha=1-0.95=0.05$

Critical value : $z_{\alpha/2}=1.960$

Now, a confidence interval at the 95% level of confidence will be :-

$22.3\pm(1.960)\dfrac{6}{\sqrt{240}}\\\\\approx22.3\pm0.759\\\\=(22.3-0.759,\ 22.3+0.759)\\\\=(21.541,\ 23.059)$

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2 years ago

Are the statements true or false? <br><br> Select a true or false statement.

spayn [35]

Answer:

true and true

Step-by-step explanation:

i took the test

6 0

2 years ago

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Whats the Axis of Symmetry? willing to give 15 points !!

nydimaria [60]

The axis of symmetry of a parabola in the form

$y=ax^2+bx+c$

is a vertical line

$x=k$

where k is the x coordinate of the vertex of the parabola.

The x coordinate of the vertex of the parabola is given by

$-\dfrac{b}{2a}$

which in your case is

$-\dfrac{-6}{2\cdot \frac{1}{4}}=\dfrac{6}{\frac{1}{2}}=6\cdot 2=12$

So, the axis of symmetry is the line x=12.

4 0

2 years ago