What value(s) of x make the equation x2 - 18x + 81 = 0 true?

9

-9, 9

0, 9

0, -9, 9

Answers

Answer 1

Answer:

the answer is 9

Step-by-step explanation:

just took a test about it

Answer 2

Answer:

A. 9

Step-by-step explanation:

100% correct on edge

please mark brainliest:)


Related Questions

A 9-yard roll of string costs $1.53. What is the unit price?

Answers

$0.17 for every yard of string

The sum of two numbers is 17 and their product is 72. Find the smaller number.

Answers

The smaller number is 8

8+9=17
8x9=72
Answer:  8

=========================================

Explanation:

Through guess and check, we find that

8+9 = 17

8*9 = 72

We see that 8 is the answer.

--------------------

Another approach:

Let m and n be the two numbers.

They sum to 17 which leads to m+n = 17. Solving for n gets us n = -m+17.

Their product is 72, so,  m*n = 72

Apply substitution and we get the following:

m*n = 72

m*(-m+17) = 72

-m^2 + 17m = 72

-m^2 + 17m - 72 = 0

-1(m^2 - 17m + 72) = 0

m^2 - 17m + 72 = 0

Now apply the quadratic formula

[tex]m = \frac{-b\pm\sqrt{b^2-4ac}}{2a}\\\\m = \frac{-(-17)\pm\sqrt{(-17)^2-4(1)(72)}}{2(1)}\\\\m = \frac{17\pm\sqrt{1}}{2}\\\\m = \frac{17\pm1}{2}\\\\m = \frac{17+1}{2} \ \text{ or } \ m = \frac{17-1}{2}\\\\m = \frac{18}{2} \ \text{ or } \ m = \frac{16}{2}\\\\m = 9 \ \text{ or } \ m = 8\\\\[/tex]

If m = 8, then n = -m+17 = -8+17 = 9.

If m = 9, then n = 8 through similar steps.

We see the two values are 8 and 9, the smaller of which is 8.

during a field trip 60 students are put into equal sized groups,describe two ways to interpret 60divided by 5 in this context

Answers

Answer:

12 students

Step-by-step explanation:

You can just divide 60 by 5 and get the answer, or you could go the longer route and put an amount into each of the five groups until it comes up to 60, then you will have your answer of how many students are in each group.

Hope this helped mark as brainliest.

Un carro utiliza 8 litros de gasolina para recorrer 96 kilómetros.Cuantos kilómetros recorre con 35 litros?​

Answers

Answer:

415.625

Step-by-step explanation:

1. Yo dividida 35 por 8. La respuesta de eso es 4.375.

2. Yo multiplica 4.375 por 95. La respuesta es 415.625 km.

PLEASE HELP WILL GIVE BRAILEST TO CORRECT ANSWER!!!!
Marcus states that the polynomial expression 3x3 – 4x2y + y3 + 2 is in standard form. Ariel states that it should be y3 – 4x2y + 3x3 +2. Explain which student is correct and why.

Answers

Answer:

opps type miss

Step-by-step explanation:

miss type

You start at (1, -4). You move left 6 units. Where do you end?

Answers

Answer:

You will end up at (-5, -4)

Step-by-step explanation:

you find where (1, -4) is on the graph than from that point move left 6 units.

simplify 3 to the 2nd power + 1 x 2

Answers

18 i’m pretty sure (:

60% of what number is 880?​

Answers

It’s should be 1,232

Answer:

1466.666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666

Step-by-step explanation:

What is the evaluation of (-5)^2 ?

Answers

Answer:

It is 25 because -5x-5=25

Step-by-step explanation:

I hope that this helps you out

Answer:

25

Step-by-step explanation:

25 because an exponent can't lead to a negative number im pretty sure

What is 4.75 in standard form?

Answers

Answer:

0.00475

Step-by-step explanation:

2 divided by what equals 4151
pls i only have an hour

Answers

the answer is 8302 :))))))))((

8302/2=4151

Step-by-step explanation:

8301/2 =4151

Help with this please

Answers

The 2nd one I think I hope the helps

Jack walked 2/3 of a mile in 1/2 of an hour how far will jack walk in one hour

Answers

Answer:

4/3 or 1 and 1/3 simplified

Step-by-step explanation:

So if Jack walked 2/3 of a mile one half a mile, to know how much he walked in an hour you have to multiply 2/3 and 2/1

2/3 time 2/1 is 4/3 or 1 and 1/3 simplified

Jaylen used the seat number for each of the 6,500 fans' seats in the stands at a college football game and put the numbers in a computer program. He randomly chose 200 numbers and found that 36 of those people had also purchased a parking voucher. Estimate the number of fans in the stands at a sold-out football game that purchased a parking voucher. Explain.

Answers

Answer:

1170 seats

Step-by-step explanation:

Given

[tex]Seats = 6500[/tex]

From the computer program, we have:

[tex]Sample = 200[/tex]

[tex]Voucher = 36[/tex]

First, we calculate the proportion (p) of those that bought the voucher

[tex]Proportion = \frac{Voucher}{Sample}[/tex]

[tex]p = \frac{36}{200}[/tex]

[tex]p = 0.18[/tex]

Using the larger population (i.e. 6500 seats), the esitimate of people that have bought the voucher is then calculated as:

[tex]Estimate= Proportion * Seats[/tex]

[tex]Estimate= 0.18 * 6500[/tex]

[tex]Estimate= 1170[/tex]

Is y=-3x^2+10 a function? Justification?

Answers

I think a function but i am not sure

Order the following integers from least or greatest
A. -15, +60, -32, +11, 0

B. -15, -12, 0, +81, -29

Answers

Answer:

Hope this helps!

Step-by-step explanation:

I'm going to do it from least to greatest:

A. -32, -15, 0, +11, +60

B. -29, -15, -12, 0, +81

Good Luck! \( ̄︶ ̄*\)

Math. Help I really need this giving brainliest to the person with the correct answer, please explain your answer....

Answers

Answer:

A.v

V for volume

I hope this helps:

Answer:

he is right v

Step-by-step explanation:

v is the common variable for volume

Evan won the 200-yard dash. If his average speed was 16 feet per second what was his time for a he dash A. 0.27 B 0.625 C 0.16 D 0.875

Answers

Answer:B. 0.27

Step-by-step explanation:

Your fi nancial advisor recommends buying a 10-year bond with a face value of $1,000 and an annual coupon of $80. The current interest rate is 7 percent. What might you expect to pay for the bond (aside from b

Answers

Answer:

Bond Price​= $1,070.24

Step-by-step explanation:

Giving the following information:

Cupon= $80

Number of periods= 10 years

Face value= $1,000

Interest rate= 7%

To calculate the price of the bond, we need to use the following formula:

Bond Price​= cupon*{[1 - (1+i)^-n] / i} + [face value/(1+i)^n]

Bond Price​= 80*{[1 - (1.07^-10)] / 0.07} + [1,000 / (1.07^10)]

Bond Price​= 561.89 + 508.35

Bond Price​= $1,070.24


Henry, Brian and Colin share some sweets in the ratio 1:5:2. Henry gets 8 sweets. How many
did Colin get

Answers

Colin would get 16 sweets.

Below are two parallel lines with a third line intersecting them.

Answers

Answer:

x = 77

Step-by-step explanation:

no hablo ingles lo siento

5x – 7y = 245?
What’s the y intercept

Answers

Answer:

(49,0)(0,-35)

y intercept (0,-35)

x intercept (49,0)

Step-by-step explanation:

2 + 1/6x = -4 *
Plz, Help me with this!

Answers

Answer: x=-36

2+1/6x=-4

-2         -2

1/6x=-6

*6     *6

x=-36

I hope this helps:

help please, i need this answer asap!!!

Answers

Fill in the spaces in this order and it should be right
1. 15
2. 9
3. 3
4. -3

A washing machine bought on hire purchase terms of a deposit of $768 and 12 monthly payments $74. What is the total hire purchase price

Answers

Answer:

$1656

Step-by-step explanation:

(12*74)+768

(888)+768

1656

Which number line and equation show how to find the distance from 2 to 5?

Answers

The answer is number line C

express $122 for 14 hours as a unit rate

Answers

Answer:

8.70 dollars/per hour

Step-by-step explanation:

122 ÷ 14 ≈ 8.7

HELP YALL it needs to be done by 3:00 i need h e l p

Answers

answer: the slope is 1

Answer:

the slope is one

Step-by-step explanation:

trust me bro .

Ms. Speer's spent a total of $120 while online shopping . Out of the total, $84 was spent just on Amazon. The rest was spent on apple. Write and equation to determine how much Ms. Speer spent at Apple. Write your equation below and determine how much she spent at Apple.

Answers

Answer:

$36 (120-84)

Step-by-step explanation:

Apple = 120-84

Apple = 36

Apple = 36

help pls1ssssssssssssssssssssss

Answers

Answer:

108 bottles

Step-by-step explanation:

[tex] \frac{4.536}{0.042} = 108 \: bottles[/tex]

Answer:

108 bottles

Step-by-step explanation:

[tex]\frac{4.536}{0.042}[/tex]=108

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