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olga_2 [115]
2 years ago
10

Compute the value of the discriminant and give the number of real solutions of the quadratic equation.

Mathematics
1 answer:
Anna71 [15]2 years ago
4 0

Answer:-9 :)

Step-by-step explanation:

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A store owner is interested in opening a second shop. She wants to estimate the true average daily revenue of her current shop t
Alex
Every confidence interval has associated z value. As confidence interval increases so do the z value associated with it. 
The confidence interval can be calculated using following formula:
\overline{x} \pm \frac{zs}{\sqrt n}
Where \overline{x} is the mean value, z is the associated z value, s is the standard deviation and n is the number of samples.
We know that standard deviation is simply a square root of variance:
s=\sqrt{315900.20}=\$562.05
The confidence interval of 95% has associated z value of <span>1.960.
</span>Now we can calculate the confidence interval for our income:
3472.00\pm \frac{1.960\cdot 562.05}{\sqrt{60}}\\ \$3472.00\pm142.22


6 0
3 years ago
What is the measure of arc WYZ?<br> ----------<br><br> 231<br><br> 255<br><br> 200<br><br> 168
Nataly_w [17]

9514 1404 393

Answer:

  (a)  231°

Step-by-step explanation:

  arc WYZ = arc WX + arc XYZ

  arc WYZ = 51° +180° . . . . . XZ is a diameter, substitute known arc measures

  arc WYZ = 231°

7 0
3 years ago
Here are the population figures of five different cities. 371,265 635,155 226,710 468,920 724,435 What is the difference between
Aleksandr-060686 [28]

Answer:

497,725

just subtract smallest from largest to get the difference

724,435 - 226,710

4 0
2 years ago
Read 2 more answers
Is (10 – 3) – 2 = 10 – (3 –) correct?
dusya [7]

Answer: No solution

Step-by-step explanation:

(10–3)–2=10–(3–)

10−3−2=10−3, this is false so it is not correct, and the answer for the equation is no solution.

6 0
3 years ago
Write 6/9=a/b in simplest form
kobusy [5.1K]

Answer:

2/3 = a/b

Step-by-step explanation:

6/9 = a/b

2/3 = a/b

8 0
3 years ago
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