3 years ago

-PLeAse HeLP-

Mathematics

1 answer:

ExtremeBDS [4]3 years ago

4 0

This question is tricky.

I think there would be B)24 people that would prefer Yellow :)

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What is the value of the discrimination for the quadratic equation 0=2x2+x-3

Ratling [72]

Remark

The formula for a discriminate is b² - 4*a*c

a = 2

b = 1

c = - 3

So the discriminate =

D = (1)² - 4*2*(-3)

D = 1 - - 24

D = 25

7 0

3 years ago

Ashley is preparing for a horse riding competition. She has trained her horse for 5 hours and has completed 195 rounds. At what

allochka39001 [22]

Answer:

1:39

Step-by-step explanation:

195 divided by 5 is 1:39.

4 0

3 years ago

Read 2 more answers

can someone help me to solve the first problem only please I will mark you the brainly helpful answers pls!

swat32

Answer:

When 2 lines are parallel, the sum of interior corresponding angles = 180

120 + b = 180

b = 180 - 120 = 60

a + 30 = 180

a = 180 - 30 = 150

3 0

3 years ago

A group of 59 randomly selected students have a mean score of 29.5 with a standard

algol [13]

Answer:

$29.5-1.671\frac{5.2}{\sqrt{59}}=28.37$

$29.5+1.671\frac{5.2}{\sqrt{59}}=30.63$

And we can conclude that the true mean for the scores are given by this interval (28.37; 30.63) at 90% of confidence

Step-by-step explanation:

Information given

$\bar X = 29.5$ represent the sample mean

$\mu$ population mean

s= 5.2 represent the sample standard deviation

n=59 represent the sample size

Confidence interval

The confidence interval for the true mean is given by the following formula:

$\bar X \pm t_{\alpha/2}\frac{s}{\sqrt{n}}$ (1)

The degrees of freedom are given by:

$df=n-1=59-1=58$

The Confidence interval is 0.90 or 90%, the significance is $\alpha=0.1$ and $\alpha/2 =0.05$ , and the critical value is $t_{\alpha/2}=1.671$

Now we have everything in order to replace into formula (1):

$29.5-1.671\frac{5.2}{\sqrt{59}}=28.37$

$29.5+1.671\frac{5.2}{\sqrt{59}}=30.63$

And we can conclude that the true mean for the scores are given by this interval (28.37; 30.63) at 90% of confidence

8 0

2 years ago

Francis has 425 plants she plans an even amount over 47 Acres how many plants does she have to take home?

Mnenie [13.5K]

19975 is your answer hopefully this helps!

3 0

3 years ago