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

4x2 + 12x + 9 = 0

A. -144; one real root

B. -144; no real roots

C. 0; one real root

D. 0; two real roots

Answer:

2806.5

Step-by-step explanation:

Mark me as brainliest

Answer:

B) 28 inches.

Step-by-step explanation:

After 1/8 of a ribbon is thrown away, the remaining part is cut into two pieces whose lengths are in the ratio 4 : 5.

And we want to find the length of the shorter ribbon from the two remaining pieces.

We are given that 9 inches of the original ribbon was thrown away. Since this is 1/8 of the total length, we can write that:

\(\displaystyle \frac{1}{8}L=9\)

Where L represents the total length of the ribbon.

Solve for the total length:

\(\displaystyle L=72\text{ inches}\)

So, the original length of the ribbon was 72 inches.

Since we threw away 9 inches of it, we now only have 63 inches.

This is then cut into two pieces in a ratio of 4 : 5. Let x represent the constant. Thus:

\((4x)+(5x)=63\)

Solve for x:

\(9x=63\Rightarrow x=7\)

Hence, the two remaining ribbons measure 28 inches and 35 inches.

Therefore, our answer is B.

Answer:

Step-by-step explanation:

9 divided by 3=3

3 times 5=15

To find the width of the volleyball court in the scale drawing, we set up a proportion using the scale (5cm : 3m) and the real-life width (9m). Solving the proportion (5cm : 3m = x : 9m) gives us a drawing width of 15cm.

The first step to solve this problem is to set up a proportion. In Dan's drawing, 5 centimeters represents 3 meters in real life. So we can write the first ratio as 5cm : 3m. We know in real life the volleyball court is 9 meters wide, so to find out how wide it is in the drawing we set up the proportion 5cm : 3m = x : 9m. To solve for x, we cross multiply and divide. (5cm * 9m) / 3m = 15cm. Thus, the width of the volleyball court in the drawing is 15 cm.

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Answer:

Step-by-step explanation:

2. y interecept --> y = 1

3. pi

4. 1, 0

Answer: 10 hours

Step-by-step explanation: in 2 hours he can get 1/5 of his work dont but 2 times 5 equal 10

Answer:

For each gallon of of water the washing machine uses, it runs for three-fifths of a minute

Step-by-step explanation:

Answer:

\(23 = z \times 15\)

Divide boty sides by 15

\(z = \frac{23}{15} = 1.53\)

The value of z is 23/15

Answer:

13.3

Step-by-step explanation:

Since 8.5 fell in February and 5.1 fell in March. We can add these two numbers together to see what the total is combined normally.

8.5 + 5.1 = 13.6

The record was 26.9, so we'll take this number and subtract it from 13.6 to see how much more fell in one day than the normal

26.9-13.6= 13.3

Answer:

Sure, I'll explain the cosine rule and sine rule in simple terms:

The cosine rule (also known as the law of cosines) is used to find the length of a side or the measure of an angle in a triangle given the lengths of the other sides and the angle between those sides. It states that c^2 = a^2 + b^2 - 2ab cos(C), where c is the length of the side opposite angle C, and a and b are the lengths of the other two sides.

Here's an example of how to use the cosine

Suppose we have a triangle with sides a=6, b=8, and an angle between them c=45 degrees. We want to find the length of the remaining side of the triangle, side a.

Using the cosine rule:

a^2 = b^2 + c^2 - 2bc * cosA

where A is the angle opposite side a, we can plug in our values and solve for a:

a^2 = 8^2 + 6^2 - 2(8)(6) * cos(45)

a^2 = 64 + 36 - 96 * 0.707

a^2 = 10.56

a = sqrt(10.56)

a = 3.25 (rounded to two decimal places)

Therefore, the length of side a is approximately 3.25 units.

Answer:

Step-by-step explanation:

Answer:

Step-by-step explanation:

2\(\sqrt{5\) + 3\(\sqrt{125\)

=2\(\sqrt{5\) +3\(\sqrt{5*5*5\)

=2\(\sqrt{5\) +5*3\(\sqrt{5\)

=2\(\sqrt{5\) +15\(\sqrt{5\)

=(2+15)\(\sqrt{5\)

=17\(\sqrt{5\)

Answer:

3

Step-by-step explanation:

Answer:

i think you should do multiplication  

Step-by-step explanation:  I hope that helps.

Answer:

(5 x 10^7)(6 x 10^4)= 3 x 10^12 is the answer in scientific notation

Answer:

As a professional failure, I shall try this.

3.5 * 10^3

Answer:

correct answer is 7 years

Step-by-step explanation:

A+56=9(A)

56+9A

A=7

he will be 7 years old he is pretty old

Answer:

Kevin is 7 years old right now.

Step-by-step explanation:

Let x be Kevin's age right now, that's what we're trying to find.

In 56 years, he'll be 9 times older than he is now, so we can say:

x + 56 = 9x

Now we can get the x values on the right side of the equation so that:

56 = 8x

Now solve for x and you have his current age which is 7.

Answer:

The rate of change in elevation for the second scuba diver is -82 feet per minute.

Step-by-step explanation:

-123 feet every minute.

1.5x more than 2nd diver.

-123/1.5 = 2nd diver rate

2nd diver rate = -82

The rate of change in elevation of the second scuba diver in feet per minute is -82 feet per second.

Given that, a scuba diver's elevation changed by -123 feet every minute.

When something has a constant rate of change, one quantity changes in relation to the other. For example, for every half  hour the pigeon flies, he can cover a distance of 25 miles. We can write this constant rate as a ratio. For ratios, it's always a good idea to state both units in whole terms.

1½=1.5 times the rate of change for a second scuba diver

Now, rate of change in elevation of the second scuba diver

= -123/1.5

= -82 feet per second

Hence, the rate of change in elevation of the second scuba diver in feet per minute is -82 feet per second.

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Answer:

Hey there!

1 liter is equal to 1000 milliliters.

0.25 liters is equal to 250 milliliters.

One mega meter is equal to 1000000 meters.

1.2 Mm= 1200000 meters.

Hope this helps :)

Step-by-step explanation:

1l = 1000ml

Convert 0.25 litres to milliliters

0.25 x 1000 = 250 ml

1 megametre = 1000000

1.2 x 1000000= 1200000m

Answer:

triangle

Step-by-step explanation:

Answer:

triangle

Step-by-step explanation:

Answer:14

Step-by-step explanation:

Answer:

Mike had 14 to begin with.

Step-by-step explanation:

16 - 9 = 7

7 x 2 = 14

14 / 2 = 7

9 + 7 = 16

Answer:

SA = 384 in ^2

Step-by-step explanation:

The surface area of a cube is given by

SA = 6 S ^2 where s is the side length

SA = 6 * (8) ^2

SA = 6 * 64

SA = 384 in ^2

Answer:

384 in^3

Step-by-step explanation:

To find the surface area of a cube, you have to multiply 6(the number of sides on a cube) by *(8)^2. When you plug it in, you get 384 in^3.

Answer:

3/5 of the students in the class are not in accounting majors

Step-by-step explanation:

The total number of males in the class is 3/8

3/5 of them are accounting majors

The ones who are not in accounting majors are;

3/8 - 3/5 = 9/40

The total number of female students in the class is;

8/8 - 3/8 = 5/8

1/4 of them are accounting majors

The ones who are not in accounting majors are;

5/8 - 1/4 = 3/8

Total number of students not in accounting majors;

9/40 + 3/8

= 24/40

= 3/5

Step-by-step explanation:

Complementary angles are when the sum = 90

Supplementary angles are when the sum = 180

Pair 1:

\(90+89=179\)

This pair is neither

Pair 2:

\(63+47=110\)

Neither

Pair 3:

\(61+29=90\)

Complementary

Answer:

area =12

Step-by-step explanation: you don't need to use all 4 numbers just used the base which is 8 then times it with 3 which gives you 24 then divided it by 2 which gives you 12.

Answer:

Area=12

Step-by-step explanation:

You take the height which is 3 and multiply it by the base which is 8. Then you get 24 and divide it by 2 which gives you 12.

*The 5s don't matter*

Answer:

nobody asked

Step-by-step explanation:

Answer:

B) the mean because flower town is skewed

Step-by-step explanation:

I just did this on homework last night goodluck

The greatest probability of being chosen is for low fat.

What is probability?

Probability is the ration of favorable outcomes and total number of outcomes.

According to the given quantity

Sum of low fat quantity :

3+6+7 = 16

Sum of non fat quantity:

5+2+1 = 8

So the total quantity = 24

The probability to choose low fat yogurt

= (sum of low fat quantity)/(total quantity)

= 16/24

= 8/3

The probability to choose non fat yogurt

= (sum of non fat quantity)/(total quantity)

= 8/24

=1/3

The probability to choose lemon yogurt

= (sum of quantity of lemon)/(total quantity)

= (6+2)/24

= 8/24

= 1/3

The probability to choose lemon yogurt

= (sum of quantity of Banana)/(total quantity)

= 8/24

=1/3

Hence probability of getting low fat yogurt = 8/3 is greater.

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Answer:

10 hours

Step-by-step explanation:

assuming its 8pm if its 8 am 4 hours

Answer:

21x+26

Step-by-step explanation:

3x [26-6x+12x]

3x[26+18x]

21x+26

could be wrong tho

Answer:

648

Step-by-step explanation:

Answer:

Answer is A

Step-by-step explanation:

My hand wont support me