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kompoz [17]
3 years ago
15

Anderson uses the discriminant to correctly find the number of real solutions of the quadratic equation x2 + 4x + 8 = 0. Which e

xplanation could Anderson provide?
Mathematics
1 answer:
astra-53 [7]3 years ago
8 0

Answer:

As the result of our discriminant is negative, this quadratic equation will have two complex solutions.

Step-by-step explanation:

Recall that the formula for a discriminant is b^2-4ac

From the given quadratic equation x^2+4x+8=0, we can gather the values of a, b, and c

a=1\\b=4\\c=8

Now, we can put these numbers into our discriminant formula

b^2-4ac\\\\(4)^2-4(1)(8)\\\\16-32\\\\-16

As the result of our discriminant is negative, this quadratic equation will have two complex solutions.

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The probability that a dancer likes ballet is .35. The probability that the dancer likes tap is .45. The probability that the da
Tom [10]

It is given the probability that a dancer like ballet is 0.35

So, P(B) = 0.35

It is given the probability that a dancer like tap is 0.45

So, P(T)= 0.45

The probability that he likes both ballet and tap is 0.30

So, P(B\cap T)=0.30

the probability that the dancer likes ballet if we know she likes tap. This is the case of conditional probability.

So, P(B/T)=\frac{P(B\cap T)}{P(T)}

P(B/T)=\frac{0.30}{0.45}

= 0.666

= 0.67

Therefore, the probability that the dancer likes ballet if we know she likes tap is 0.67.

Option 3 is the correct answer.

6 0
3 years ago
John typed a 48 word paragraph in 2/3 minute. What is the typing speed in words per minute​
serg [7]

Answer:  The answer is:  " 72 words per minute. "

___________________________

Step-by-step explanation:

___________________________

This is a "unit rate" problem.

We want to solve for/ find the number of words PER single minute.

___________________________

Given 48 words per (2/3) minute;

How many words per (one) minute?

__________________________

The answer is {48 ÷ (2/3) } words per minute:

 Note: dividing by a number is the same as multiplying by the reciprocal (inverse) of that particular number:

Hence:

__________________________

The answer is {48 * (3/2) } words per minute:

__________________________

 Write as:

  " \frac{48}{1} *\frac{3}{2} " ;

__________________________

  The "48" can be changed to "24" ; and the "2" can be changed to "1" ;

   → {Since: "48 ÷ 2 = 24 "} ;

___________________________

And we have:

___________________________

  " \frac{24}{1} *\frac{3}{1} = 24 * 3 = 72 " ;

___________________________

The answer is:  " 72 words per minute ."

___________________________

Hope this is helpful to you!

___________________________

4 0
3 years ago
Read 2 more answers
A large box contains 18 small boxes and each small box contains 25 chocolate bars. How many chocolate bars are in the large box?
Katarina [22]
You need to multiply 25 by 18 to find the total.

25 x 18 = 450.

There are 450 chocolate bars in the large box
5 0
3 years ago
Read 2 more answers
Please help me!! due tonight!
olasank [31]

Answer:

Srry Cant read it :(

Step-by-step explanation:

3 0
3 years ago
Quick I need help: Sunny earns $18 per hour delivering cakes.She worked for x hours this week.Unfortunatly,she was charged $10 f
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18x - 10
There is no way to find out how many hours she worked so the answer is an expression. An expression has no equal sign.
5 0
3 years ago
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