Question 1

well the is a 1:4 Faculty:trainee ratio
if there are 2:20, that would be a 1:10

you just need to find 1/4th of 20 and thats the total
20/4=5
You need five faculty total so
YOU NEED 3 MORE

Question 2

600 pretzels/10 minutes
?pretzels/52 minutes
600x52/10=3120

Question 3

700 people/ 2 tons
20,850,000/ ? tons
20,850,000 x 2 / 700= <span>59,571.4285714 OR about 60,000 tons</span>

7 0

3 years ago

Find the discriminant and the number of real roots for this equation.

Margaret [11]

Our discriminant is 0 so, $4x^2 + 12x + 9 = 0$ has one real root.

Option C is correct.

Step-by-step explanation:

we need to find the discriminant and the number of real roots for the following equation:

$4x^2 + 12x + 9 = 0$

The discriminant is found by using square root part of quadratic formula:

$b^2-4ac$

where b =12, a=4 and c=9

Putting values:

$=b^2-4ac\\=(12)^2-4(4)(9)\\=144-144\\=0$

To find out the number of real roots using discriminant we have following rules:

if discriminant b^2-4ac >0 then 2 real roots
if discriminant b^2-4ac =0 then 1 real root
if discriminant b^2-4ac <0 then no real roots

Since our discriminant b^2-4ac is 0 so, $4x^2 + 12x + 9 = 0$ has one real root.

Option C is correct.

Keywords: discriminant

Learn more about discriminant at:

#learnwithBrainly

6 0

2 years ago

2x1= how much answer ​

2x1= how much answer