2 years ago

I need help with this

Mathematics

1 answer:

grandymaker [24]2 years ago

5 0

Answer:

361

Step-by-step explanation:

discriminant = b² - 4ac

= (21)² - 4(1)(20)

= 441 - 80

= 361

You might be interested in

After a 75% reduction, you purchase a new clothes dryer for $200. What was the original price of the clothes dryer?

lesya [120]

Answer:

$800

Step-by-step explanation:

Let the original price be $x.

75% reduction ----- 100% -75%= 25%

25%x= 200

$\frac{25}{100} x = 200 \\ x = 200 \div \frac{25}{100} \\ x = 200 \times \frac{100}{25} \\ x = 800$

Thus, the original price of the clothes dryer is $800.

3 0

3 years ago

Read 2 more answers

alissa's monthly budget is $1500. she spends 30% on rent. How much does she spent on the rent? A)$250 B)300 C)450 D)500

I am Lyosha [343]

1500 × 0.30 = $450 (C)

3 0

3 years ago

Read 2 more answers

A die is rolled one thousand times. The percentage of aces should be around ____ or so. the first step iin computing this proble

Katyanochek1 [597]

Answer:

Following are the solution to the given question:

Step-by-step explanation:

Please find the complete question in the attached file.

$Box \ average =\frac{1}{6} \\\\SD = \frac{1}{6} \times \frac{5}{6} = \frac{5}{36} \approx 0.373\\\\Expected \ value= 1000 \times \frac{1}{6} \approx 166.7\\\\SE = 1000 \times 0.373 \approx 11.8\\\\$

The total number of aces is approximately 167, 12 or more. The SE is 12 out of 1000, which is 1.2 percent.

The percentage of aces is expected to be around 16.67% , or 1.2%.

7 0

3 years ago

Please help with this question.

ziro4ka [17]

Answer:suchi i think is on the cite

Step-by-step explanation: suchi you need rice at first

4 0

3 years ago

How many 8ths are in a pound

Novay_Z [31]

Answer:There are 129 eighths in one pound of

Step-by-step explanation:

6 0

3 years ago