1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Vinil7 [7]
3 years ago
8

Find the zeros for y=x^2-3x-10

Mathematics
2 answers:
attashe74 [19]3 years ago
7 0

Answer:

x=5 and -2

Step-by-step explanation:

Deffense [45]3 years ago
3 0

Answer: y=x^2-3x-10 = The solution is the result of  

x

−

2

=

0

and  

x

+

5

=

0

You might be interested in
SA = πrs + π r^2 <br> Can someone help me with this problem
ollegr [7]
SA = pirs + pir^2
SA - \pir^2 = \pirs

7 0
3 years ago
Read 2 more answers
Lilly has 5 dogs. 3 of the dogs are brown. Could 3 of the dogs be black? Explain.
ArbitrLikvidat [17]
No. If Lily only has five dogs and three of the dogs are brown there would only be two dogs left
3 0
3 years ago
Read 2 more answers
What Expression Is Equivalent To The Given Expression? Assume The Denominator Does Not Equal Zero.
kakasveta [241]

Answer:

cd^4

Step-by-step explanation:

cd^4/c^2d^8

you minus the exponents since it's division, so c^1-c^2=c^-1 and d^4-d^8= d^-4

1/c^-1d^-4 and you take the reciprocal to make it even cd^4

~I think that's right not sure though

3 0
3 years ago
The mean of a population is 74 and the standard deviation is 16. The shape of the population is unknown. Determine the probabili
uysha [10]

Answer:

(a) P(\bar X \geq 76) = 0.2327

(b) P(73 < \bar X < 75) = 0.5035

(c) P(\bar X < 74.8) = 0.77035

Step-by-step explanation:

We are given that the mean of a population is 74 and the standard deviation is 16.

Assuming the data follows normal distribution.

<u><em>Let </em></u>\bar X<u><em> = sample mean </em></u>

The z-score probability distribution for sample mean is given by;

                         Z = \frac{\bar X -\mu}{\frac{\sigma}{\sqrt{n} } } ~ N(0,1)

where, \mu = population mean = 74

            \sigma = standard deviation = 16

            n = sample size

The Z-score measures how many standard deviations the measure is away from the mean. After finding the Z-score, we look at the z-score table and find the p-value (area) associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X.

(a) Probability that a random sample of size 34 yielding a sample mean of 76 or more is given by = P(\bar X \geq 76)

   P(\bar X \geq 76) = P( \frac{\bar X -\mu}{\frac{\sigma}{\sqrt{n} } } \geq \frac{76-74}{\frac{16}{\sqrt{34} } } ) = P(Z \geq 0.73) = 1 - P(Z < 0.73)

                                                 = 1 - 0.7673 = <u>0.2327</u>

<em>The above probability is calculated by looking at the value of x = 0.73 in the z table which has an area of 0.7673.</em>

<em />

(b) Probability that a random sample of size 120 yielding a sample mean of between 73 and 75 is given by = P(73 < \bar X < 75) = P(\bar X < 75) - P(\bar X \leq 73)

   

   P(\bar X < 75) = P( \frac{\bar X -\mu}{\frac{\sigma}{\sqrt{n} } } < \frac{75-74}{\frac{16}{\sqrt{120} } } ) = P(Z < 0.68) = 0.75175

   P(\bar X \leq 73) = P( \frac{\bar X -\mu}{\frac{\sigma}{\sqrt{n} } } \leq \frac{73-74}{\frac{16}{\sqrt{120} } } ) = P(Z \leq -0.68) =1 - P(Z < 0.68)

                                                 = 1 - 0.75175 = 0.24825

Therefore, P(73 < \bar X < 75) = 0.75175 - 0.24825 = <u>0.5035</u>

<em>The above probability is calculated by looking at the value of x = 0.68 in the z table which has an area of 0.75175.</em>

<em />

(c) Probability that a random sample of size 218 yielding a sample mean of less than 74.8 is given by = P(\bar X < 74.8)

   

   P(\bar X < 74.8) = P( \frac{\bar X -\mu}{\frac{\sigma}{\sqrt{n} } } < \frac{74.8-74}{\frac{16}{\sqrt{218} } } ) = P(Z < 0.74) = <u>0.77035</u>

<em>The above probability is calculated by looking at the value of x = 0.74 in the z table which has an area of 0.77035.</em>

7 0
3 years ago
Find the area of a regular hexagon with apothem 2√3 mm. Round to the nearest whole number.
Varvara68 [4.7K]
Join the center of the hexagon with the 2 base angles.

An equilateral triangle, with side length x, is formed.

(remark: a regular hexagon is made up of 6 equilateral triangles with equal length)

The height 2 \sqrt{3} forms 2 congruent right triangles with :

hypotenuse= x, side_1=x/2, and side_2= 2 \sqrt{3}.

From the pythagorean theorem we have:

x^{2} = ( \frac{x}{2} )^{2}+(2 \sqrt{3})^{2}

x^{2} =  \frac{ x^{2} }{4} +12

\frac{3}{4} x^{2} =12

x^{2} = \frac{12*4}{3}=4*4

thus, x=4.

The area of the triangle is 1/2 * 4 * 2 \sqrt{3}=6.93 (mm squared)

The area of the hexagon is 6* the area of the triangle = 42 (mm squared)


Answer: a. 42 (mm squared)
8 0
4 years ago
Other questions:
  • What is the volume of a 3 foot tall cylindrical trash can with a 1 foot radius
    12·1 answer
  • You are thinking of employing a t procedure to test hypotheses about the mean of a population using a significance level of 0.05
    14·1 answer
  • 7. 3х + 3 = 3(х + 1)
    15·1 answer
  • Pleaseeee help fast
    15·2 answers
  • What is 8.023 in expanded form
    15·2 answers
  • Write an equation of the line
    6·1 answer
  • You bought a car that had factory installed tires marked as "P185 75/R14". You bought and installed tires on your car that are m
    13·1 answer
  • Round 50.341 to the nearest hundredth.<br><br><br><br><br> Can someone plz help me
    11·1 answer
  • 50 points!!
    7·2 answers
  • Need help 10 points
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!