PLS HELP.... If 4x^2 + bx + 9 = 0, where b is the constant, has exactly one solution, what is a possible value of b ?
A. 72
B. 36
C. 12
D. 6

Answers

Answer 1
you can use the discriminant rule, which is :
b^2 -4ac
“exactly one solution” means that it is equal to zero
so:
b^2 -4(4)(9)=0
b^2 -4(36)=0
b^2 -144=0
b^2=144
square root both sides
b=12 or -12

hope this helps !

Related Questions

Find the missing length

Answers

6^2+8^2=c^2
36+64=100
C=10

A bird dove towards a lake, touched it briefly to grab a fish and then flew off into the air. The graph below shows the birds height in relative to the surface of the water over time where as the birds height(y) is measured in meters and time(x) is measured in seconds. After how many seconds does the bird hit the water

Answers

Answer:60 second

Step-by-step explanation:

What is the slope for y=200-5x

Answers

Answer:

5

Step-by-step explanation:

The slope is 5 because the equation is y = 200-5x where 5 is the slope because it is the rate of change.

The slope is -5.

y = -5x + 200

y = -5x + 200; m = -5

Share £300 in the ratio 2:3

Answers

Answer:

£200/£300

Step-by-step explanation:

Answer:

5x=300£

X=60£

2x=120£

3x=180£

hope it helps

An online game store charges a $20 membership fee and $2.50 for each downloaded game. Write an
equation to model this situation Ifa new member paid the store $67.50 in the last three months, how
many gentes were downloaded?

Answers

Answer:

3?

Step-by-step explanation:

First I added 20 dollars to 2.50 and I got 22.50 than  I divided 67.50 / 22.50 which gave me 3, so I guess the answer is 3. Hope this helped!

6. The additive inverse of
-4÷7 is​

Answers

Answer:

4X=M +Y

Example 4+4=8/8+8=16

Like that it is

Answer:

+0.57

Step-by-step explanation:

hope this helps you

please mark me as brainlist

Dad arrived home at 4:50 p.m. He left work 40. Minutes ago. What time did dad get off work

Answers

Answer:

4:10 p.m.

Step-by-step explanation:

4:50 p.m.

60 minutes in an hour

4:50 - 40 = 4:10

Answer:

4:10pm

Step-by-step explanation:

If he left 40 minutes ago and arrived at 4:50pm, then we must subtract the 40 minutes from the time, 4:50pm.

Remember we are subtracting minutes, not hours so we will only subtract from the minutes on the time, which displays 50.

50 - 40 = 10

4:10pm

Please Help Me!!!!!!!!!

Answers

Answer:

I believe the correct answer would be

[tex]y = x - \frac{3}{20} [/tex]

Step-by-step explanation:

Isolate the y

The answer is y=x-3/20

Your parents took your family out to dinner . Your parents want to give you the server a 15% tip . If the total amount of the dinner was $42.00 , what will be the amount of the tip ?

Answers

Answer:

The tip will be $6.30

Help pls.. answer choices; Always, Never, Sometimes

Answers

Answer:

1. Sometimes

1. Sometimes2. Always

1. Sometimes2. Always3. Never

1. Sometimes2. Always3. Never 4. Always

1. Sometimes2. Always3. Never 4. Always5. Never

Are the answers

It costs $35 for a membership at a wholesale store. the monthly fee is $15. Write an equation that represents the total cost( in dollars) of a membership.

Answers

Answer:

35+15=50 or 35$+15$=50$

Step-by-step explanation:

If its for twelve months

35$+180$=215$

5. A softball has a diameter of 8.3 in. How many softballs will fit inside of a storage unit 4 that is 15 feet wide, 10 feet long, and 5 feet high?

Answers

Answer:

4329 softballs

Step-by-step explanation:

To find the number of softballs that will fit into the container, we first find the volume of the softball. Since it is a sphere, its volume V = 4πr³/3 where r = radius = d/2 where d = diameter of softball.

So, V = 4π(d/2)³/3 = πd³/6

Since d = 8.3 in,

V =  πd³/6 =  π(8.3 in)³/6 = π × 571.787 in³/6 = 299.39 in³

The volume of the box, V' = 15 × 10 × 5 ft³ = 750 ft³ = 750 × (12 in)³ = 750 × 1,728 in³ = 1,296,000

So, for n softball to fit, its volume must equal the volume of the storage unit.

The volume of n softballs is nV.

For the softballs to fit, V' = nV

n = V'/V

= 1,296,000 in³/299.39 in³

= 4328.8 softballs

≅ 4329 softballs since we cannot have a decimal number of softballs.

CAN SOMEONE PLEASE WRITE AN EQUATION FOR THAT LINE? THIS IS THE 4th TIME I POSTED IT PLEASE SOMEONE HELP!!$

Answers

Answer: y= [tex]\frac{-3}{1}[/tex]x-4

Step-by-step explanation:

y=mx+b

slope= -3/1

y intercept (the y intercept is where the line intercepts the y axis) = -4

y= [tex]\frac{-3}{1}[/tex]x-4

I am not a professional, simply using prior knowledge.

Note- It would mean the world to me if you could mark me as brainliest!

what is 30%of 20_______? ​

Answers

Answer:

6

Step-by-step explanation:

30/100 * (20)

.3 (20) = 6

Answer: 6

Step-by-step explanation:

What is the center of the circle for this equation:

x² + y² = 25

Answers

Answer:x=√−y2+25 or x=−√−y2+25

Step-by-step explanation:

Answer: (0,0)

Step-by-step explanation:

since there is no number by the variable your answer must be on the origin.

Find the Area of the figure below, composed of a rectangle with two semicircles
removed. Round to the nearest tenths place.
15

Answers

Answer:

61.7

Step-by-step explanation:

i had this question on the exact delta math thing and its 61.7,i dont know how to do it its complicated.

Solve by using 2 step method 8 = За – 4

Answers

Answer:

A=4

Step-by-step explanation:

8=3a-4

+4     +4

12=3a

12/3=3a/3

4=a

What is the Measure of angle PQR? PLEASE HELP ASAP DUE TODAY AND I HAVE NO IDEA HOW TO DO THIS!!

Answers

Answer:

55°

Step-by-step explanation:

Remember:

-  A flat angle is 180°

- The sum of the angles in a triangle is 180°

Answer: m< PQR = 55 degrees

Step-by-step explanation:

a company estimates 0.3% of their products will fail after the original warranty period but within 2 years of the purchase, with a replacement cost of $450. if they offer a 2 year extended warranty for $42, what is the companys expected value of each warranty sold?

Answers

I honestly don’t know


Find the area of the shaded section.
3 cm
9 cm
7 cm
16cm​

Answers

Answer:

The area of the shaded portion is 123 cm^2

Step-by-step explanation:

Here, we want to find the area of the shaded portion

To find this, we subtract the area of the smaller inner rectangle from that of the outside bigger one

Mathematically, the area of a rectangle at any point in time is length * width

For the bigger one, we have;16 * 9 = 144 cm^2

For the smaller inner one, we have ;3 * 7 = 21 cm^2

The area of the shaded portion which is the difference is;

144-21 = 123 cm^2

yooo could I get some help with this math hw, im being timed so tysm if u can help:))
a triangle has side lengths of 2 meters, 11 meters, and 11 meters. classify the triangle by the lengths of its sides.

isosceles triangle
equilateral triangle
scalene triangle
obtuse triangle

Answers

Answer:

Isosceles Triangle

Step-by-step explanation:

Equilateral: All equal sides

Isosceles: 2 equal sides

Scalene: No equal sides

You have one dollar bills and five dollar bills totaling 45 dollars.
You have 4 times as many one dollar bills as you do five dollar bills. How many
of each type of bill do you have?

Answers

answer:

pretty sure its 5 5s and 20 1s

The answer and how did you got it

Answers

Answer:

Help me What did you in msnjxnjxnjcdjjhejxjjxjx

The ratio of potatoes to carrots in a vegetable cart is 1:1. If there are 473 carrots, how many potatoes are there?

Answers

Answer:

473 potatoes

Step-by-step explanation:

473/1 = 473

(Plus anything times/divided by 1 equals itself)

so 1:1 x 473:473 = 473:473

Therefore there are 473 potatoes

Answer:

473 potatoes

Step-by-step explanation:

The ratio is 1:1, meaning that for every carrot, there is a potato.

After eating at the restaurant, Jason, Tim, and Dan decided to divide the bill evenly. if each person paid $39, what was the total of the bill? write an equation.​

Answers

Answer:

$117

Step-by-step explanation:

39 x 3 or 40+40+40-3

Answer:

$39 x 3 = $117

Step-by-step explanation:

With this problem, we can see that 3 total people went out to eat, meaning that the bill was divided 3 ways evenly. This means that each person paid $39, and to find the grand total then we just need to multiply that number by 3. This will give you an equation of $39 x 3 = $117. $117 was the grand total of the bill. Hope this helps!

describe how the graph of g(x) is related to the graph of f(x) = 1/x. g(x) = -1/x +5

Answers

Answer:

yea

Step-by-step explanation:

Is the area of the base of a shape different from the area of the whole shape?

Answers

Answer:

Yes, its going to be different because the base is only a piece of the whole shape, not the entire thing. Hope this helps! plz mark brainliest if possible :)

Step-by-step explanation:

Brady has a card collection with 32 baseball cards, 64 baseball cards, and 24 baseball cards. He wants to arrange the cards in equal piles, with only one type of card in each pile.

Answers

Answer:

4 B1, 8 B2 and 3 B3

Step-by-step explanation:

Given

The collections are:

[tex]B_1 = 32[/tex]

[tex]B_2 = 64[/tex]

[tex]B_3 = 24[/tex]

Required

Determine the number of cards in each pile [Missing Information]

To do this, we simply calculate the GCF of the given collections.

[tex]32 = 2*2*2*2*2[/tex]

[tex]64 = 2*2*2*2*2*2[/tex]

[tex]24 = 2 * 2 * 2 * 3[/tex]

The GCF is:

[tex]GCF = 2 * 2 * 2[/tex]

[tex]GCF = 8[/tex]

This implies that, there are 8 equal piles in total

The number of each collection in each pile is:

[tex]B_1 = 32[/tex]

[tex]B_1 = 32/8[/tex]

[tex]B_1 = 4[/tex]

[tex]B_2 = 64[/tex]

[tex]B_2 = 64/8[/tex]

[tex]B_2 = 8[/tex]

[tex]B_3 = 24[/tex]

[tex]B_3 = 24/8[/tex]

[tex]B_3 = 3[/tex]

can someone pls answer my recents :(

Answers

Answer:

i cannot see your questions

Step-by-step explanation:

Answer:

Ok

Step-by-step explanation:

Karim drove 540 for 5 hours. How far could he drive in 3 hours?

Answers

Answer:

324 miles

Step-by-step explanation:

540/5=108 per hour

108*3=324

Answer:

324

Step-by-step explanation:

Take x as the number of hours.

5x=540

x=108

Then multiply x by 3 so that you have 3 hours rather than 1, doing the same to the other side of the equation, so they stay equal.

3x=324

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