what is the answer to x^{2}-2x=15

Answers

Answer 1

Answer:

Two solutions:

x = 5 and x = -3

Step-by-step explanation:

Simplify:

x^{2} - 2x = 15

-15              -15

x^{2} - 2x -15 = 0

Find what numbers multiplied by eachother equal -15 and also add to -2:

-5 * 3 = -15

-5 + 3 = -2

Rewrite equation and put each expression equal to 0:

(x - 5)(x + 3) = 0

x - 5 = 0      x + 3 = 0

  +5    +5         -3     -3

x = 5            x = -3


Related Questions

I need help please!!:)

Answers

Answer:

No bcuz its not on the line

Step-by-step explanation:

No because it’s right on the line

An amusement park has two featured rides that require an additional ticket, the Slingshot and the Scream Flyer. On a summer day, 1279 visitors entered the park. 280 visitors bought tickets for either the Slingshot or the Scream Flyer. 247 visitors bought a ticket for the Slingshot and 237 visitors bought a ticket for the Scream Flyer. What is the probability that a randomly selected visitor bought tickets for both the Slingshot and the Scream Flyer

Answers

Answer:  [tex]\frac{204}{1279}[/tex]

Step-by-step explanation:

Formula for intersection:

n(A and B) = n(A)+n(B)-n(A or B)

Given: n(Slingshot) = 247

n(Scream Flyer)= 237

n(Slingshot or the Scream Flyer) = 280

n (Slingshot and Scream Flyer)= 247+237-280

=204

Probability of any event = [tex]\frac{\text{Number of favourable outcomes}}{\text{total outcomes}}[/tex]

P(both the Slingshot and the Scream Flyer)= [tex]\frac{204}{1279}[/tex]

Required probability = [tex]\frac{204}{1279}[/tex]

Write the standard equation of each circle below

Answers

Okay so if you answer me in the comments I can help you but I need more explanation than that :)

what is the formula of gradient

Answers

Answer:

m=slope

(x_1, y_1)=coordinates of the first point in the line

(x_2, y_2)=coordinates of the second point in the line

Step-by-step explanation:

One package of cookies contains 3,460 calories. Each serving of cookies contains 72 calories. About how many servings are in the package?

Answers

Answer:

Number of servings= 48.05

Step-by-step explanation:

Giving the following information:

One package of cookies contains 3,460 calories. Each serving of cookies contains 72 calories.

To calculate the number of servings, we need to use the following formula:

Number of servings= total calories / calories per serving

Number of servings= 3,460 / 72

Number of servings= 48.05

What would be the second step in simplifying the expression 4 2 ÷ (2 • 9) + 5?

Answers

Answer:

7.333

Step-by-step explanation:

(42 ÷ 18 ) +5 =

7/3 +5 =

7/3 + 15/3 =

22/3 =

7.333

Answer:

4.33

Step-by-step explanation:

Laura has a 12-foot ladder. The safety instructions recommend the base of the ladder be placed 4 feet from the base of the wall. How high will the ladder be able to reach on the wall? BRAINLIEST FOR CORRECT ANSWER!!!!

Answers

Answer:

3

Step-by-step explanation:

12÷4=3

Have a good day:)


I need to find X and Y

Can someone pls help me

Answers

y=35 x=110 however im a bit confused on x but im sure on y

which statement is not guaranteed to be true

Answers

Answer:

Diagonal AC is NOT perpendicular to diagonal BD

Step-by-step explanation:

PLEASE HELPP!!! NO FLIE OR LINKS
decide whether each is a rhombus, rectangle, square, none of these, or all of these

Answers

Answer:

The first one is a square! The second is none of these because its a trapezoid

Step-by-step explanation:

Answer:

7. all of the above

9. none of these

Step-by-step explanation:

graph number 7

you will see from the diagonal test that the diagonals of this shape are congruent. All four angles in the interior are congruent making it a rhombus. The outside side lengths are all equal to 6.71. Making it a rectangle. The definition of a square is if it is both a rectangle and a rhombus then it is a square.

graph number 9

you can plainly see that this is a trapazoid which is none of either of these choices.

hope this helps.

A prime number that is 1 more or 1 less than the value of a factorial is called a factorial prime. Which of the following numbers is not a factorial prime?

4! - 1 = 23
6! - 1 = 719
5! - 1 = 119
3! - 1 = 5

Answers

Answer:

Step-by-step explanation:

What is the average rate of change for this quadratic function for the interval from x = 0 to x = 2?

Answers

Answer:

8

Step-by-step explanation:

The average rate of change for this quadratic function for the interval from x = 0 to x = 2 is -2

What is a function?

A relation is a function if it has only One y-value for each x-value.

The average rate of a function f(x)  from x=a to x=b is given as:

= f(b)-f(a)/b-a

Clearly we are asked to find the average rate of change from x=0 to x=2.

i.e. a=0 and b=2

Also, from the graph it could be observed that:

f(0)=1

and f(2)=-3

=f(2)-f(0)/2-0

=-3-1/2

=-4/2

=-2

Hence, the average rate of change for this quadratic function for the interval from x = 0 to x = 2 is -2

To learn more on Functions click:

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factorizar A- m⁹+125
B - 125a³ + 150a² b + 60ab³ + 8b³​

Answers

Answer:

Kya Hua Hai Bhai Sab Kuchh khae Duniya Mein Sab Koi pata nahin to Aap To Pyar Karte

Find the value of x (Best answer is brainliest)

Answers

Answer:

35

Step-by-step explanation:

180-110=70

70/2=35

x=35

You take 180-110=70 and divide it by two because you have to know each angle measure. That causes you to get 35. Therefore, X=35

Hope this helps:)

Area of triangle please help

Answers

Answer:

A= 18

Step-by-step explanation:

Answer:

18 your answer is correct

Step-by-step explanation:

12x3=36

36÷2=18

Jack took out a 6-year loan for $25,000 to purchase a boat at a 4.5% interest rate. If the interest is compounded monthly, what will he have paid total over the course of the loan?

Answers

Answer: $32,732.58

Step-by-step explanation:

To calculate the total loan payment over the course of the loan period, use the future value formula:

= Loan amount * (1 + rate) ^ number of years

As this loan is compounded monthly, you need to convert certain terms to monthly figures:

Number of periods = 6 * 12 months = 72 months

Interest = 4.5 / 12 = 0.375%

Total payment:

= 25,000 * ( 1 + 0.375%)⁷²

= $32,732.58

He will have to pay $34,236.31 over the course of the loan.

Using the compound interest formula expressed as:

[tex]A =P(1+r/n)^{nt}[/tex]

P is the principal = $25000

r is the rate = 4.5% = 0.045

t is the time in years = 6 years

n is the compounding amount = (12)monthly

Substitute into the formula:

[tex]A =25000(1+0.045/12)^{12(7)}\\A=25000(1.36945)\\A = \$34,236.31[/tex]

Hence he will have to pay $34,236.31 over the course of the loan

Learn more on compound interest here: https://brainly.com/question/24274034

CAN SOMEONE HELP WITH THESE 2 questions please!! Reposting cause someone said too !!! Will mark u brainlist and give u points!!!

Answers

Answer:

do u need help with the whole page?

Step-by-step explanation:

What is the least common denominator of the equation 2/9x + 2/3x =7 ?

Answers

Answer:

that would be 9 as the least common denominator

Step-by-step explanation:

find three consecutive odd integers such that the sum of the last two is 15 less than 5 times the first​

Answers

2n + 1 , 2n + 3 , 2n + 5

____________________________

( 2n + 5 ) + ( 2n + 3 ) = 5 × ( 2n + 1 ) - 15

4n + 8 = 10n + 5 - 15

4n + 8 = 10n - 10

Add both sides 10

4n + 8 + 10 = 10n - 10 + 10

4n + 18 = 10n

Subtract both sides 4n

4n - 4n + 18 = 10n - 4n

18 = 6n

Divide both sides by 6

18 ÷ 6 = 6n ÷ 6

n = 3

_________________________________

Thus that three numbers are :

2(3) + 1 , 2(3) + 3 , 2(3) + 5

6 + 1 , 6 + 3 , 6 + 5

7 , 9 , 11

And we're done ....

A website 500,000 members in 2010. The number y of members increases by 15% each year. Write an exponential growth function that represents the website membership t years after 2010. How many members will there be in 2016? Round your answer to the nearest ten thousands

Answers

Answer:

a = 500,000(1.15)^t

1,160,000

Step-by-step explanation:

a = 500,000(1.15)^t

in 2016

a = 500,000(1.15)^6

a = 1,156,530

Rounded

1,160,000

The number of members present in 2016 is 1,156,530. It can be rounded to 1,160,000.

What is an exponential function?

The function is expressed in the form like f(x) = a^x  are called exponential function. Where x is a variable and a is a constant.

The number of members in the website in 2010 is 500,000.

Each year y members increased by 15%.

The exponential relation of members and year is

y = 500,000(1.15)^t

Then in 2016 the number of members present are given by,

y = 500,000(1.15)^6 = 1,156,530.

Hence, 1,156,530 members present in 2016. It can rounded to 1,160,000.

To learn more about exponential function, use the link given below:

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Need help
Pls explain

Answers

9514 1404 393

Answer:

  y = -1.5x +3

Step-by-step explanation:

The two points marked on the line are ...

  (-4, 9) and (6, -6)

The slope formula can be used to find the slope:

  m = (y2 -y1)/(x2 -x1)

  m = (-6 -9)/(6 -(-4)) = -15/10 = -1.5

The intercept formula can be used to find the y-intercept:

  b = y -mx

  b = 9 -(-1.5)(-4) = 9 -6 = 3

The slope-intercept form of the equation for a line is ...

  y = mx + b . . . . . . . line with slope m and y-intercept b

  y = -1.5x +3

_____

Additional comment

We can see that the line crosses the y-axis at y=3, so this is the value of b. We only need to read it from the graph. We don't really need the formula shown above.

The line also crosses the x-axis at x=2. This means the line decreases 3 units (from y=3 to y=0) as x increases by 2 units (from x=0 to x=2). Then the slope is ...

  m = rise/run = (-3)/(2) = -3/2 = -1.5 . . . . as calculated above

That is, we can find the parameters of interest by simply counting grid squares on the graph.

Five children have heights of 138cm, 135cm, 140cm, 139cm, and 141cm.
What is the range of their heights?

Answers

Answer:

6 cm

Step-by-step explanation:

To find the range take the largest number and subtract the smallest number

The largest number is 141 and the smallest number is 135

141 - 135 = 6 cm

Find the greatest common factor of 12x and 15x^3”.

Answers

3x(5x2-4)................

I need Answer Immediately!!!!!!

Answers

Answer:

24.2424242424242%

Step-by-step explanation:

16+17+33=66

16÷66=0.2424242424242

Any help plssssssssssss I need to pass

Answers

Answer:

(-4,-5)

Step-by-step explanation:

hope you pass ur exams!!

If f (x) = 6x – 5,
find x for f (x = 13

Answers

Step-by-step explanation:

f(x)=136x-5=136x=13+5x=18/6x=3

hope it helps stay safe healthy and happy....

Answer:

Solution :-here,

f (x)= 13

or, 6x-5= 13

or, 6x =13+5

or, 6x = 18

or, x = 18/6

or, x = 3

hope it is helpful to you

Kunicki uses a medium and a large measuring cup to measure the ingredients to make his famous Buttery Oatmeal Raisin Cookies. He wants to know how many ounces of liquid each measuring cup can hold. He first filled a 80 ounce mixing bowl with 8 large cups and 4 medium cups of liquid. 4 large cups and 12 medium cups of liquid. How many ounces each cup holds?

Answers

Answer:

L = 16oz

M = 12oz

S = 8oz

Step-by-step explanation:

8 large equal to 128oz ( 8 x 16 = 128 )

4 medium equal to 48oz ( 4 x 12 = 48

4 large equal to 64oz ( 4 x 16 = 64

12 medium equal to 144oz ( 12 x 12 = 144 )

Total of oz equal 384oz

384 - 80 = 304/80 = 3.8

3 more bowl of 80oz and 5 Mcup and 1/2 Scup

Please help me!!!! I have been stuck on this question for like a half an hour now.

Answers

3x^2+21x+6=3(3x^2+7x+2)=3(3x^2+6x+x+2)=3[3x(x+2)+(x+2)]=3(3x+1)(x+2)
It should be A.

You can simplify by taking out the GCF for each term which is 3. So divide each term by 3, which leaves you with

3(3x^2+7x+2)

Simplify & factor and you get
3(3x+1)(x+2)

Help me solve this! |2x-8|+4>-3

Answers

Answer:

true for all x

Step-by-step explanation:

|2x-8|+4>-3

Subtract 4 from each side

|2x-8|+4-4>-3-4

|2x-8|>-7

An absolute value is always positive so this is true for all x

The period of function is 4 pie how many cycles of the function occur in a horizontal length of 12 pie

Answers

Answer: 3

Step-by-step explanation:

Given

The period of the function is [tex]4\pi[/tex] i.e. function completes a full cycle in this zone.

For a horizontal length of [tex]12\pi[/tex]

Number of cycles is

[tex]\Rightarrow \dfrac{12\pi }{4\pi }=3[/tex]

So, there are 3 ycles of the function in length of [tex]12\pi[/tex].

Answer:

3

Step-by-step explanation:

I just did it and it was correct.

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