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3 years ago

Tran is solving the quadratic equation 2x2 – 4x – 3 = 0 by completing the square. His first four steps are shown in the table.

Mathematics

2 answers:

anygoal [31]3 years ago

8 0

Answer:

Not positive, but I'm pretty sure it's Step 3.

Step-by-step explanation:

Nady [450]3 years ago

3 0

The following steps of solving for the roots of 2x² - 4x -3 = 0 were retrieved from another source Step 1 2x² - 4x = 3 Step 2 2(x² - 2x) = 3 Step 3 2(x² - 2x + 1) = 3 + 1 Step 4 2(x - 1)² = 4 From this, we can see that on Step 3, Tran made a mistake of adding 1 to 3. As we can see, 2(x² - 2x + 1) = 2x² - 4x + 2. That means, instead of adding 1, it should have been 2. Therefore, the step that Tran first made an error is Step 3<span>.</span>

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Please help I learned this a while ago and forgot how to do it

lara [203]

Answer:

The slope-intercept form is $y=\frac{1}{2}x+\frac{11}{2}$

Step-by-step explanation:

To find the slope, use

$m=\frac{y^2-y^1}{x^2-x^1}$

Replace the x and y values with the points.

$m=\frac{7-5}{3-(-1)}$

Solve.

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After that, find the y-intercept form.

Put the equation in point-slope form.

$y-5=\frac{1}{2}(x+1)$

Replace x with 0.

$y-5=\frac{1}{2}(0+1)$

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Add 5 to both sides.

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Convert to improper fraction form.

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2 years ago

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Viefleur [7K]

Answer:

Step-by-step explanation:

3 0

2 years ago

Read 2 more answers

2.Write 784,229 in expanded form

Zanzabum

Answer:700,000+80,000+4,000+200+20+9

Step-by-step explanation:

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3 years ago

Right and solve a proportion For this statement: 16 is to 10 as what number is to 25

Vladimir79 [104]

Answer:

Step-by-step explanation:

<h2><u>Ratios </u></h2>

16 is to 10 as what number is to 25

this makes use of ratios

16 : 10

x : 25

hence we can make use of cross multiplication

10x = 16 * 25

10x = 400

<u>x = 40</u>

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<h3><u>the number is 40</u></h3>

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3 years ago

8. People with type O-negative blood are universal donors. That is, any patient can receive a transfusion of O-negative blood. O

Kay [80]

The probability that at least 1 of the population of America is has a blood group of O-negative and are universal donor when 10 people appear at random to give blood is 0.526.

<h3>What is the probability?</h3>

Probability of an event is the ratio of number of favorable outcome to the total number of outcome of that event.

People with type O-negative blood are known as the universal donors, which means any patient can receive a transfusion of O⁻ blood from the donors.

Only 7.2% of the population of America has O-negative blood group. Thus, the probability of this population to donate blood is,

$P=\dfrac{7.2}{100}\\P=0.072$

The probability of population to be not O-negative,

$P^{-1}=1-0.072\\P^{-1}=0.928$

The 10 people appear at random to give blood. The probability of at least 1 of them is a universal donor is,

$P{\text { at least 1 }}=1-(0.928)^{10}\\P{\text { at least 1 }}=0.526$

Thus, the probability that at least 1 of the population of America is has a blood group of O-negative and are universal donor when 10 people appear at random to give blood is 0.526.

Learn more about the probability here;

brainly.com/question/24756209

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1 year ago