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3 years ago

The discriminant of a quadratic equation is negative. One solution is 3+4i . What is the other solution?

2 answers:

4 0

I believe the correct answer from the choices listed above is option B. <span>The discriminant of a quadratic equation is negative. One solution is 3+4i . The other would be 3-4i. Hope this answers the question. Have a nice day.</span>

LenaWriter [7]3 years ago

3 0

Answer: Option B 3-4i is the correct option

Explanation:

we have formula for discriminant $D=b^{2}-4ac$

after that we find the required variable that is to be find according to the quadratic equation given suppose we have to find x

then we have formula $x=\frac{-b\pm\sqrt{D}} {2a}$

Here we have $\pm$ of roots if we have one root 3+41 other would be of opposite sign and hence,definitely be 3-4i.

Therefore Option B 3-4i is the correct option.

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Bag A contains 3 white marbles and 2 red marbles. Bag B contains 6 white marbles and 3 red marbles. A person draws

mr_godi [17]

Answer:

$\frac{2}{5}$

Step-by-step explanation:

Bag A:

White = 3

Total = 3 White + 2 Red = 5

Prob (white marble from A) = $\frac{3}{5}$

Bag B:

White = 6

Total = 6 White + 3 Red = 9

Prob (white marble from B) = $\frac{6}{9}$

Prob (white from Bag A and white from Bag B)

= Prob (white marble from A) x Prob (white marble from B)

= $\frac{3}{5}$ x $\frac{6}{9}$

= $\frac{2}{5}$

8 0

3 years ago

Find the missing factor. 5s^2+23s+24=(s+3)()

prisoha [69]

Answer:

Step-by-step explanationthats too easy

5 0

3 years ago

Kendra has $ 7.35 in nickels and quarters. If she has 15 more quarters than nickels, how many of each coin does she have?

lozanna [386]

x*5 - quarter amount

(x+15)*25- nickels amount

(x*5)+((x+15)*25)=735

5x+25x+375=735

30x=735-375

30x=360

x=360/30=12 - number of nickels

x+15=12+15=27 - number of quarters

CHECK

12*5=60 ¢

27*25=675 ¢

675+60=735 ¢ or $7.35

5 0

4 years ago

Need help ASAP !!

aleksley [76]

The missing expression should be for Step 3 is [(25 + 3)/0.5] - 16.4 ÷ 4 and the missing expression should be for Step 6 is 56 - 4.1

<h3>Part A: Explain what the missing expression should be for Step 3</h3>

To do this, we make use of the expression in step 2

The expression in step 2 is

[(5^2 + 3)/0.5] - 16.4 ÷ 4

The next step at this stage is to evaluate the expression 5^2

So, we have:

[(25 + 3)/0.5] - 16.4 ÷ 4

Hence, the missing expression should be for Step 3 is [(25 + 3)/0.5] - 16.4 ÷ 4

<h3>Part B: Explain what the missing expression should be for Step 6.</h3>

To do this, we make use of the expression in step 5

The expression in step 5 is

56 - 16.4 ÷ 4

The next step at this stage is to evaluate the expression 16.4 ÷ 4

So, we have:

56 - 4.1

Hence, the missing expression should be for Step 6 is 56 - 4.1