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3 years ago

Select all the functions that have no real number solution. 4x^2 + 100 = 0 3x^2-9= 0 x²+1=0

Mathematics

1 answer:

ratelena [41]3 years ago

4 0

Answer:

3x^2-9=0

Step-by-step explanation:

√3 does not equal a whole number.

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the length of a rectangle piece of paper is 20 cm and the breadth is 10 cm. if this paper has to be separated into square shaped

luda_lava [24]

The best way ( meaning, the way that results squares with the biggest areas ) is to cut it in 2 squares with the lenght of 10cm. Then, the area is 10*10 cm = 100 cm^2

Why cut it like this? We find the highest number that divides both 20 and 10, in this case it's 10. Then, we can cut squares with the lenght of 10 cm. But we have a rectangle with the area of 20*10=200 cm^2 , and we cut squares of 10*10=100cm^2. 200/100=2. So we cut 2 squares Also, you could say that it's because the simmetry line cuts the rectangle in 2 other simetrical rectangles, which in this case, happen to be squares.

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4 years ago

Estimate using compatible numbers. Show the numbers used. 1286÷ 32

Sindrei [870]

Answer:

41 big boy thats ur answer

Step-by-step explanation:

7 0

3 years ago

Help please within the next hour

olasank [31]

c. 9

To complete the square, you take half of the coefficient of b and square it. It's important to note that the value being added will always be positive.

${ax}^{2} + bx + c$

$b = - 6$

$- 6 \div 2 = - 3$

$= {( - 3)}^{2}$

$= 9$

5 0

3 years ago

A t-shirt increased in price by

Anika [276]

Answer:

100

Step-by-step explanation:

2/5 of 100 is 40

100+40=140

5 0

3 years ago

8. By one estimate, 3% of all Siberian Husky puppies are born with two different

skad [1K]

Answer:

Mean = 1.5

Standard Deviation = 1.206

Step-by-step explanation:

Percentage of Siberian Huskies with two different colored eyes = p = 3% = 0.03

Sample size selected = n = 50

We have to find the mean and standard deviation of the number of puppies with two different colored eyes.

Either the puppies will have two different colored eyes or they won't. Sample size is fixed in this case which is 50. A puppy with two colored eyes is independent of other puppies, this means the trials are independent. The probability of success is fixed in this case which is 3%. This setting satisfies all 4 conditions of a Binomial experiment, so we will use the formula relevant to Binomial experiment to answer this question.

Mean number = $\mu=np$

Using the values, we get:

$\mu=50(0.03)=1.5$

Standard deviation of Binomial experiment is calculated as:

$\sigma=\sqrt{np(1-p)}$

Using the values, we get:

$\sigma=\sqrt{50 \times 0.03 \times 0.97}\\\\ \sigma=1.206$

7 0

3 years ago