solve by factoring x^2 -9 =0​

Answers

Answer 1
x = 3 and -3

X^2 - 9 = 0
(X+3)(X-3) = 0

X + 3 = 0
X = -3

X - 3 = 0
X = 3

Related Questions

Kevin is choosing between two cell phone plans that offer the same amount of free minutes. AT&T’s plan charges $19.99 per month with additional minutes costing $0.35. Verizon’s plan costs $34.99 with additional minutes at $0.30. How many additional minutes, a, will it take for the two plans to cost the same? *

Answers

Answer:

300 minutes

Step-by-step explanation:

Step one:

Given data

AT&T’s plan

monthly charge= $19.99

additional charge per minute= $0.35

let the number of minutes be x

let the total charges be

y=0.35x+19.99----------1

Verizon’s plan

monthly charge= $34.99

additional charge per minute= $0.3

let the number of minutes be x

let the total charges be

y=0.3x+34.99----------2

Step two:

equating the two equations above we have

0.35x+19.99=0.3x+34.99

collect like terms

0.35x-0.3x=34.99-19.99

0.05x=15

divide both sides by 0.05

x=15/0.05

x=300

For the two plans to cost the same, it will take 300 minutes

Answer:

300 Minutes

Step-by-step explanation:

Elina is gathering up change she has saved. She has a total of $2.60. All of her change is in either nickles, dimes, or quarters. She has twice as many dimes as quarters and two less quarters than nickles. Is it possible that she has eight dimes, four quarters, and six nickels? Explain.

Answers

Answer:

sadsadwsd

Step-by-step explanation:

Slope of (2,8) and (2,6)

Answers

no slope because the points are vertical.

1.)which of the following actions is NOT a form of transformation
a.) Reflection
b.) Rotation
c.) Dilation
d.) Draw

2.) If two shapes are congruent they must have...
a.) the right angle
b.) the same area
c.) the same perimeter
d.) the same shape and size

3.) If two shapes have the same area and perimeter....

a.) then the two shapes must be congruent

b.) then the two shapes have the same size

c.) the two shapes may not be congruent

d.) then the two shapes have four sides

Answers

Answer:

1. d

2. d

3. c

explanation

1. reflection, rotation, and dilations are all transformations

2. congruent shapes have to have the same shape and size, meaning they also have the same angle measures

3. sometimes, shapes may have the same area and perimeter but be different

Hellpp ⚠️⚠️
What is the square root of -16?
A -8i
B -4i
C 4i
D8i

Answers

Answer:

4i

Step-by-step explanation:

c or b i hope i helped you  have a good day

A cab company charges $3.10 flat rate in addition to $0.85 per mile. Rex has no more than $15 to spend on a ride. Write an inequality that represents Rex's situation. How many miles can Rex travel without exceeding his limit? Round off your answer to nearest tenth.

Answers

Answer:

Step-by-step explanation:

Let the total number of miles Rex can travel be x;

If a cab company charges $0.85 per mile, then x miles will cost $0.85x

If the flat rate rate charge is $3.10, the total price for x miles will be;

0.85x + 3.10

Since Rex has no more than $15 to spend on a ride, the inequality to represent the equation will be;

0.85x + 3.10 ≤ 15 (less than or equal to means that the total value cannot exceed $15)

Next is to solve for x

Given

0.85x + 3.10 ≤ 15

subtract 3.10 from both sides

0.85x + 3.10-3.10 ≤ 15-3.10

0.85x ≤ 15-3.10

0.85x ≤ 11.90

x ≤  11.90/0.85

x ≤ 14

This means that Rex can travel 14 miles without exceeding his limit

Answer:

[tex]3.10 + 0.85m \leq 15[/tex]

[tex]m \leq 14.0[/tex]

Step-by-step explanation:

Given

[tex]Flat\ Rate = \$3.10[/tex]

[tex]Addition = \$0.85[/tex] (per mile)

[tex]Maximum\ Amount = \$15[/tex]

Required

Determine the inequality that represents the scenario and solve

Let the number of miles be represented by m.

The company's charges can be calculated using:

[tex]Flat\ Rate + Additional\ Charges * m[/tex]

Substitute values

[tex]\$3.10 + \$0.85 * m[/tex]

Rex can't exceed $15 implies that the company's charges can't exceed Rex's budget.

This is expressed as:

[tex]\$3.10 + \$0.85 * m \leq \$15[/tex]

[tex]\$3.10 + \$0.85m \leq \$15[/tex]

[tex]3.10 + 0.85m \leq 15[/tex] ---- The inequality

Solving for m: Collect Like Terms

[tex]0.85m \leq 15 - 3.10[/tex]

[tex]0.85m \leq 11.9[/tex]

Divide through by 0.85

[tex]m \leq 11.9/0.85[/tex]

[tex]m \leq 14.0[/tex] ---- The solution

Hi, this isn't a math question or anything. But I have a question about high schools. So I have all A's for my first marking period and one C for an enirchnment. But do you think I could get into a good high school like Central? Also, I'm not taking the PSSA or big tests. Also, I'm in 7th grade if your wondering.

Answers

Answer:

Depends on your GPA

Step-by-step explanation:

A blueprint for a house has a scale of 1:30. A wall in the blueprint is 3 in. What is the length of the actual wall?
30
60
90
120

Answers

Answer:

C.90

Step-by-step explanation:

1 inch = 30

30 * 3 = 90

Prove that ABCD is a rectangle.
A = (-4, 4)
B = (0,5)
C = (1, 1)
D = (-3,0)

Answers

Answer:

Draw it on a graph sheet

The easiest way to prove it is to show it on a graph paper

4x-3=2x+7 solve the equation

Answers

Answer:

First collect like terms

4x-2x=7+3

6x=10

x=10/6

x=1.66666666667

x=1.67

Step-by-step explanation:

Please give me brainliest

Answer:
x=1.67


Explanation:
I NEED POINTS!!!

Annie is participating in a winner-take-all World Series of Poker tournament that costs 101010 thousand dollars to enter. The prize for winning the tournament is 500500500 thousand dollars. Annie estimates that there is a 0.5 \%0.5%0, point, 5, percent chance that she will win the tournament. Find the expected value of entering the tournament for Annie.

Answers

Answer: −7.5 thousand dollars

Step-by-step explanation: Khan Academy

Using the expected value formulae, the expected value of Annie entering the tournament is -$7950

Creating a probability distribution table :

Net amount won = (500 - 100) = 400 thousand

Amount lost = 100 thousand

X ___ : - 10,000 ____ 400,000

P(X) _ : __ 0.995 _______ 0.005

Using the expected value formulae:

E(X) = Σ[X × P(X)]

E(X) = (0.995 × - 10,000) + (0.005 × 400,000)

E(X) = - 9950 + 2000

E(X) = -7950

Hence, the expected value of entering the tournament is -$7950

Learn more : https://brainly.com/question/19236072

A perimeter of a square field is 20cm. what is the area of the field?

Select one:

a. 25cm2

b. 16cm2

c. 12cm2

d. 48cm2​

Answers

25 because each side is 5cm. So when you multiply length times width, you would multiply 5x5. So 25cm^2

The area will be 25cm²

HOPE IT HELPS YOU

Need help asap please!

Answers

Answer:

Step-by-step explanation:

-2/3x ≥ -x -2

-2/3x ≥ -x -2 +x

Simplify

1/3x ≥ -2

3 · 1/3x ≥ 3(-2)

x ≥ -6

I hope this is correct

Factor
1 out of -x +6
The factored expression is

Answers

Answer:

6+f=21

Step-by-step explanation:

HELP! will give brainliest!!! The United States released 5.877 billion metric tons of carbon
dioxide into the environment through the burning of fossil fuels in a recent year. If
1 trillion pounds = 0.4536 billion metric tons, how many trillion pounds of carbon
dioxide did the United States release in that year?

Answers

Answer:

13.0 trillion pounds of carbon dioxide

Step-by-step explanation:

5.877 ÷ 0.4536 = 12.9563492063

rounded to 1 decimal place =

13.0 trillion pounds of carbon dioxide

The carbon dioxide released by United States is 12.9563 trillion pounds

What is conversion?

In math, conversion is the process of changing the value of one form to another for example inches to millimeters, or liters to gallons.

Now it is given that,

Amount of carbon dioxide released by United States = 5.877 billion metric tons

It is also given that,

1 trillion pounds = 0.4536 billion metric tons

So, 1 billion metric tons = (1/0.4536) trillion pounds

Thus, 5.877 billion metric tons =  (5.877/0.4536) trillion pounds

5.877 billion metric tons =  12.9563 trillion pounds

Thus, the carbon dioxide released by United States is 12.9563 trillion pounds

To learn more abut conversion:

https://brainly.com/question/12681461

#SPJ2

You plan to invest $100 per month for the next 10 years into an account that pays 8% with daily compounding. How much will you have in the account in 10 years?

Answers

Answer:

FV= $18,213.18

Step-by-step explanation:

First, we need to calculate the monthly real interest rate:

Daily interest rate= 0.08/360= 0.00022

Monthly interest rate= (1.00022^30) - 1

Monthly interest rate= 0.0066

Assuming a year of 360 days, and months of 30 days.

Now, we can determine the future value of the investment:

Monthly deposit= $100

Number of periods= 10*12= 120

FV= {A*[(1+i)^n-1]}/i

A= monthly deposit

FV= {100*[(1.0066^120) - 1]} / 0.0066

FV= $18,213.18

4) A cell phone company would like to run a promotion for a limited time. The cellphone
company is activating a phone line for $40. People will have to pay $50 each month for
phone service. Which equation can be used to find y, the amount that someone will pay
for x months?
y = 40x + 10
y = 40x + 50
y = 40 + 50x
y = 10x + 40

Answers

y=40+50x

$40 is the initial price so it stays constant. It never changes.

$50 is the slope because every month they pay $50 so it’s increasing at a constant rate and always stays linear.

Consider a parabola P that is congruent to y=x^2, opens upward, and has vertex (0,0). Find the equation of a new parabola that results if P is reflected in the x-axis, and translated 1 unit to the left and 3 units up.

Answers

9514 1404 393

Answer:

  y = -(x+1)^2 +3

Step-by-step explanation:

Translating f(x) left by 1 unit replaces x with x+1.

Translating f(x) up by 3 units replaces f(x) with f(x)+3.

Reflecting f(x) over the x-axis replaces f(x) with -f(x).

__

When y = x^2 is reflected over the x-axis, it becomes ...

  y = -x^2

When y = -x^2 is translated 1 unit left, it becomes ...

  y = -(x +1)^2

When y = -(x+1)^2 is translated 3 units up, it becomes ...

  y = -(x +1)^2 +3

Which of the following relations is a function?

OA. (9,-10).(-8, 7), (9,6), (-8, 12)

OB. (-8, 0), (-1,5). (-8, -3), (5,9)

OC. (-1,-2), (-8,-5), (5,8). (5,2)

OD. (-8,2).(-1,3), (5,7), (9,2)​

Answers

OD. Is a function because all x inputs are different.

Allison is making party favors. She has a roll of ribbon that is 4 1/3 feet long. Each favor needs 1/3 feet of ribbon. How many favors can she make?

Answers

Answer:

13 favors

Step-by-step explanation:

Roll of ribbon = 4 1/3 feet long.

favor = 1/3 feet of ribbon

How many favors can she make?

Number of favors = Total roll of ribbon / length of each favors

= 4 1/3 feet ÷ 1/3 feet

= 13 / 3 × 3 / 1

= (13 × 3) / (3 × 1)

= 39 / 3

= 13

Number of favors = 13

Allison can make 13 favors from 4 1/3 feet of ribbon each of 1/3 feet

How do I do this? And what’s the answer??

Answers

Answer:

its asking you what the slope of the line is (rise/run) and for the point at which the line crosses the y axis (verticle line)

Step-by-step explanation:

When finding the slope you count the number of units up and the number of units across. This would be -1/1 or -1 because the graph shows a scale of 100, and the slope is going down 100, and across 100. this makes the slope negative since it's going downwards. so the slope would be -100/100 which would simplify to -1.

the y-intercept is where the line crosses the y axis. if this point is below the x-axis, then the y-intercept would be negative. in this problem however, the line crosses the y-axis at the origin (0,0)

so your equation would be y=1x+0, but simplified it would be y=x (the one isnt used because there is a single x value and the +0 is gone because it holds no value)

I need help solving for x

Answers

X=-10

That’s the answer

2.
Which of these expressions is equivalent to -2(x - 5)?
A.
-2x – 5
B.
- 2x + 5
C.
-2x + 10
-2x – 10
D.

Answers

Answer:

C.

Step-by-step explanation:

Evalute -2(x-5)

-2x+10

Answer:

-2x+10

Step-by-step explanation:

-2(x-5)

= -2x +10 { multiplying equation by -2}

Note:

(-)×(-) = (+)

(+) × (+) = (+)

(-) × (+) = (-)

(+) × (-) = (-)

If a cotton candy vendor has 16 blue cones which is 50% of the total number of cones, then how many TOTAL cones does he have i need answers FAST like before the end of the week

Answers

Answer:

He has a total of 32 cones

Step-by-step explanation:

Solve 6w – 2 ≤ 10 for w.

Answers

Answer:

w greater than 2

Step-by-step explanation:

∆CDE is an isosceles triangle with CD ≅ DE . If CD = 9x – 25, DE = 6x + 8, and CE = 10x – 73, find x

Answers

Answer:Answer: The value of x is 11 and the measure of each sides are, 74 cm,74 cm and 37 cm. Explanation: It is given that in triangle CDE is an isosceles triangle with CD congruent to DE. If CD equals 9x - 25, DE equals 6X + 8, CE equals 10 x - 73.

Step-by-step explanation:

Answer:

x=11

Step-by-step explanation:

Which transformation shows a rigid motion help ASAP

Answers

Answer:

d

Step-by-step explanation:

Because it looks rigid

At a farming supply store 7 pounds of seed cost $153.37. If a farmer needed 4 pounds of seeds, how much would it cost him?​

Answers

$153.37 x 4 = $613.48
$613.48 / 7 = $87.64
i believe $87.64 is your answer

What similarity property, if any, can be used to show that the following two triangles are similar.

A.) SAS
B.) AA
C.) SSS
D.) Not enough information given

Answers

The answer would be C which is SSS

PLS I RLLY NEED HELP I MIGHT GIVE BRAINLIEST Just pls help

What is the equation in slope-intercept form of a line that is perpendicular to y=1/3x+2 and passes through the point (3, 1)?
A) y= 3x - 10
B) y=-3x + 10
C) y=-1/3x+2
D) y= 1/3x - 10

Answers

Answer:

y=3x-7

step by step explaination:

Answer:

not an answer but nice pfp

Other Questions
Cause and effect graphic organizers compare and contrast dates and events? The price of an item yesterday was $180. Today, the price rose to $279. Find the percentage increase.HELPPP PLEASSEDONT SWIPE PAST:,(I SAW THATTTT Based on your reading of Act I of Julius Caesar, to whom is the character of Brutus most loyal?CaesarO CassiusO HimselfRome I need help plz asap Why is it that the statues that Greeks and Romans or anyone else made, Always have the NOSE fall off first? Anyone else realize that? Either that or its arms. I just don't understand! _ Or why are they always naked.UUUGGHH! as a membership fee, a health club charges a one time amount of $40 and charges $25 each month. the total fee after m months is $240 what is the value of m 1) If a bottle of olive oil contains 1.3 kg of olive oil, what is the volume, in milliliters, of the olive oil? Express your answer to two significant figures and include the appropriate units. 2) A cannon ball made of iron has a volume of 116 cm^3. What is the mass, in kilograms, of the cannon ball? Express your answer to three significant figures and include the appropriate units. 3) A balloon filled with helium has a volume of 6.1 L. What is the mass, in grams, of helium in the balloon? Express your answer to two significant figures and include the appropriate units. What is the binary number for 16 What is equality? How does a person feel when they have experienced equality?What is equity? Do you think equality and equity are the same things? Which one do you think is more important? 2. The increase of carbon dioxide in the atmosphere has had which effect on the Earth's climate? [6(42)+(2123+1)]32 V = 4 + at, solve for A Is landform is a word meaning human movement. True Or False?? Please help:() The navigation act (1651) - how does this affect mercantilism? Pg 101 Listen to an account of Crystal's childhood years in Argentina. Write the conjugated verbs that you hear and indicate whether they are in the imperfect or the preterite tense. Someone please help will mark as brainliest 5. Write 5 sentences using compare-contrast on siblings and friendship. why does cutliest give me wrong answers =( A certain plant grows 1 1/6 inches every week. How long will it take the plant to grow 4 1/6 inches? how many body systems are in eating a single bite of turkey? PLSS HELP its duo in abt 6 mins!!