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2 years ago

Please help me after all of my questions are solved i will do a 100 points giveaway

Mathematics

2 answers:

Umnica [9.8K]2 years ago

8 0

Answer:

A and B

Step-by-step explanation:

4(d-2)

4 times d is 4d

4 times -2 is -8

sasho [114]2 years ago

6 0

Answer:

Step-by-step explanation:

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Which of the statements about the following quadratic equation is true?

Sedaia [141]

After manipulating above equation we get, 2x^2 - 7x - 8= 0. Discriminant= b^2 - 4ac = (-7)^2 - 4(2)(-8) = 113>0. So there are 2 real roots :)

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3 years ago

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At a certain high school, 15 students play stringed instruments and

Aleks [24]

Answer:

0 is the probability that a randomly selected student plays both a stringed and a brass instrument.

Step-by-step explanation:

Given that:

Number of students who play stringed instruments, N(A) = 15

Number of students who play brass instruments, N(B) = 20

Number of students who play neither, N( $A \cup B$ )' = 5

To find:

The probability that a randomly selected students plays both = ?

Solution:

Total Number of students = N(A)+N(B)+N( $A \cup B$ )' =15 + 20 + 5 = 40

(As there is no student common in both the instruments we can simply add the three values to find the total number of students)

As per the venn diagram, no student plays both the instruments i.e.

$N(A\cap B) =0$

Formula for probability of an event E can be observed as:

$P(E) = \dfrac{\text{Number of favorable cases}}{\text {Total number of cases}}$

$P(A\cap B) = \dfrac{N(A\cap B)}{N(U)}\\\Rightarrow \dfrac{0}{40}\\\Rightarrow P(A\cap B) = 0$

So, 0 is the probability that a randomly selected student plays both a stringed and a brass instrument.

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2 years ago

Gerald buys a bag of 7,500 assorted beads online. A random sample of 150 beads contains 17 red beads. Predict the number of red

Vanyuwa [196]

850. If there is 17 red beads for every 150 beads Then you would divide 7500 by 150 and you get 50. Then multiply 50 with 17 and your answer is 850 red beads. 7500/150=50. 50 x 17= 850.

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2 years ago

Identify the asymptote(s) of this function: y=5/(x-4)+1

Dimas [21]

$y= \frac{5}{(x-4)+1}$
$y= \frac{5}{x-3}$
So you take the denominator and compare to zero.
$x-4+1=0$
$x-3=0$
$x=3$
Then the horizontal asymptote is y = 0

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3 years ago

Is a 90° angle perpendicular

Dima020 [189]

Answer:

yes

Step-by-step explanation:

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2 years ago

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