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3 years ago

What is the nature of the roots for y=x2 - 4x + 4?

Mathematics

1 answer:

Archy [21]3 years ago

3 0

Answer:

x = 2

Step-by-step explanation by completing the square:

Solve for x:

x^2 - 4 x + 4 = 0

Write the left hand side as a square:

(x - 2)^2 = 0

Take the square root of both sides:

x - 2 = 0

Add 2 to both sides:

Answer: x = 2

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This event is independent, true or false?

Scorpion4ik [409]

Answer:

This event is independent this statement is true because we cannot control the motion of a dice.

Step-by-step explanation:

Hope it will help you :)

6 0

3 years ago

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Which one is the better deal, the 8 inch little zip for $6.25 or the 11 inch big zip for $7.75.

natta225 [31]

Answer:

the 11 inch big zip for 7.75

Step-by-step explanation:

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2 years ago

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In a class of 25 students, 15 of them have a driver's license. If ten students are randomly selected, what is the expected numbe

const2013 [10]

Answer:

Expected number of students would have a driver's license = 6

Step-by-step explanation:

Explanation:-

Given data In a class of 25 students, 15 of them have a driver's license

The sample proportion

$p = \frac{x}{n} = \frac{15}{25} = 0.6$

Let 'X' be the binomial distribution

Given sample size 'n' = 10

mean of the binomial distribution or expected number of students would have a driver's license

μ = n p

= 10 × 0.6

= 6

Conclusion:-

Expected number of students would have a driver's license = 6

5 0

2 years ago

Sam can prepare 20 wall paintings in four weeks. How much time will he need to prepare 80 wall paintings?

sesenic [268]

It would be 16 weeks or 4 months

4 0

3 years ago

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Match the set of two interior angle measurements with the third interior angle measurement that can make a triangle.

ioda

Answer:

$40^\circ,50^\circ$ and 90^\circ$

$42^\circ,66^\circ$ and 72^\circ$

$60^\circ,60^\circ$ and 60^\circ$

Step-by-step explanation:

The sum of angles in a triangle is 180 degrees

(a)Given the angles 40° and 50°

The third angle is, therefore: $180^\circ-(40^\circ+50^\circ)=90^\circ$

We, therefore, have the set: $40^\circ,50^\circ$ and 90^\circ$

(b)Given the angles 42° and 66°

The third angle is, therefore: $180^\circ-(42^\circ+66^\circ)=72^\circ$

We, therefore, have the set: $42^\circ,66^\circ$ and 72^\circ$

(c)Given the angles 60° and 60°

The third angle is, therefore: $180^\circ-(60^\circ+60^\circ)=60^\circ$

We, therefore, have the set: $60^\circ,60^\circ$ and 60^\circ$

6 0

2 years ago