Solve the equation x2-81 = 0.

Answers

Answer 1

Answer:

40.5

Step-by-step explanation:

x2 - 81 = 0 --> + 81 to both sides

2x = 81 --> divide by 2 on both sides

x = 40.5

Answer 2

Answer:

2x-81=0

2x=0+81

2x=81

x=81

2

x=40.5 ANSWER.

MARK ME AS A BRAINLIST PLZ.


Related Questions

If there are four black kittens and two orange kittens how does the number of orange kittens compared to the total number of kittens in the litter write a comparison beginning with for every?

Answers

Answer:

For every two black kittens, there is one orange kitten.

Step-by-step explanation:

Simplify the ratio and put it in word form.

Answer:

For every three kittens there is one orange kitten

Step-by-step explanation:

The total number of kittens is equal to four black kittens + two orange kittens, which makes for six kittens.

So for every six kittens there are two orange kittens.

We can simplify this down further by dividing by the greatest common factor, 2.

So,

For every three kittens there is one orange kitten.

what is the equation of the line that is perpendicular to y = −2x + 5 through the point (-4, -5)

Answers

Step-by-step explanation:

m1=-2

m1m2=-1

-2m2=-1

m2=1/2

y+5/x+4=1/2

so 2y+10=x+4

2y-x=-6

Answer:

[tex]y=\frac{1}{2}x-3[/tex]

Step-by-step explanation:

Hi there!

We are given the equation y=-2x+5 and we want to find the equation of the line that is perpendicular to that line, and pass through the point (-4, -5)

Perpendicular lines have slopes that multiply to get -1.

So to find the slope of the perpendicular line: use the formula [tex]m_1*m_2=-1[/tex], where [tex]m_1=-2[/tex]

Substitute:

-2m=-1

Divide both sides by -2

m=[tex]\frac{1}{2}[/tex]

Here's the equation of the line so far, as we know it, written in slope-intercept form (y=mx+b, where m is the slope and b is the y intercept):

[tex]y=\frac{1}{2}x+b[/tex]

We need to find b.

Because we know the line passes through the point (-4, -5), we can use it to help solve for b.

Substitute -4 as x and -5 as y

[tex]-5=\frac{1}{2}(-4)+b[/tex]

Multiply:

-5=-2+b

Add 2 to both sides

-3=b

Substitute -3 as b:

y=[tex]\frac{1}{2}x-3[/tex]

Hope this helps!

please please please help PLEASE PLEASE

Answers

Step-by-step explanation:

refer to the picture.. hope this helps :)

On October 23, 2011, one U.S. dollar was worth 49.84 Indian rupees.
(a) On that date, how many rupees was 77.65 dollars worth?
Round your answer to the nearest hundredth of a rupee.
rupees
(b) On that date, how many dollars was 82.12 rupees worth?
Round your answer to the nearest hundredth of a dollar.
dollars

Answers

On that date, 77.65 dollars is worth 3,870.08 rupees.

On that date, 82.12 rupees is worth  $1.65.

What is the worth of the currencies?

Exchange rate is the rate at which one currency is exchanged for another currency.

In order to convert rupees to dollars, multiply the value of the rupees by the exchange rate:

value of the rupees x exchange rate

77.65 to rupees = 77.65 x 49.84 = 3,870.08 rupees

In order to convert dollars to rupees, divide the value o the dollars by the exchange rate:

value of the dollars / exchange rate

82.12 to dollars = 82.12 / 49.84 = $1.65

To learn more about exchange rate, please check: https://brainly.com/question/25780725

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Function 1 is defined by following table what function has greater y- intercept?

Answers

Answer:

They both have the same y intercept

Step-by-step explanation:

(1,0)(0,3)

(0,3)(1,-1)

WHAT IS THE MEASURE OF ANGLE #5

WHAT IS THE MEASURE OF ANGLE #6

WHAT IS THE MEASURE OF ANGLE #7

WHAT IS THE MEASURE OF ANGLE #8

Answers

Answer:

5)42º

6)112º

7)112º

8)38º

Step-by-step explanation:

m<6         180-68=112

m<5         180=26+112+x            42=x

m<7 is congruent to m<6

m<8         180=30+112+x            38=x

solve 4n - 8 = 14n + 12
please help <3 ( will give brainliest )

Answers

Basically...

4n - 8 = 14n + 12

Simply collect like terms,

4n-14n=12+8

-10n=20

Divide both sides by -10

n= -2

Please mark BRAINLIEST.

Step-by-step explanation:

[tex]4n - 8 = 14n - 4n \ \\ - 8 - 4 = 14n - 4n \\ - 20 = 10n \\ - \frac{20}{10} = n \\ n = - 2[/tex]

joseph traveled from Boston to Framingham at 50 mph and then back to boston at 40 mph, What was Joseph average speed on the round trip
*IT SAYS 45 IS NOT THE ANSWER*
*EXPLAIN HOW TO SOLVE IT*
30 BRAINLY POINTS!!!!!
AND BRAINLIEST!

Answers

Answer: 44.44 mph

(50 + 40) / 2 = X

88.88/2 = X

44.44= X

Step-by-step explanation:

Both Tyrone and Albert walk to and from school every day. Qlbert has to walk 1.25 miles farther than Tyrone does each way. If Tyrone's house id 0.6 mile from school, how far do the two boys walk altogether?​

Answers

Answer: 0.6 + 1.25 = 1.85

0.6 + 1.85 = 2.45

Given the following function, find f(-2), f(0), and f(1).
f(x) = x2 + 3
=

Answers

Answer:

jjjjnnuiuhjiihhiihb

Step-by-step explanation:

tyuijiojnoo.

yu8ijhiihj

The answer to f(-2) is -1. F(0) is 3. F(1) is 5.

which strategy would not solve the rational equation?

Answers

Answer:

This may occur when you decide to determine a function as well as a graph.

Step-by-step explanation:

Hope this helps! :D

How do I solve for this?

Answers

https://brainly.com/invite/3caaa23db4167cc1029ce1999a411bee?utm_source=invite&utm_medium=link&utm_campaign=bfp_parental_feed&utm_term=parent

Answer:

angle L = 100 degrees

angle M = 110 degrees

angle N = 70 degrees

angle P = 80 degrees

Step-by-step explanation:

find value of 'x' then substitute into each of the four angle expressions

to find 'x', add all expressions and set them equal to 360 (there are 360 degrees in any four-sided polygon)

2x + 20 + 3x - 10 + 2x - 10 + 2x = 360

combine 'like' terms to get:

9x = 360

x = 40

angle L = 2(40) + 20 = 100 degrees

angle M = 3(40) - 10 = 110 degrees

angle N = 2(40) - 10 = 70 degrees

angle P = 2(40) = 80 degrees

Check:

100 + 110 + 70 + 80 = 360

hello can anyone please help with this.
Selina takes 1 and a half hours to cycle 12 miles.
What is her average cycling speed?

Answers

[tex]▪▪▪▪▪▪▪▪▪▪▪▪▪  {\huge\mathfrak{Answer}}▪▪▪▪▪▪▪▪▪▪▪▪▪▪[/tex]

Given terms :

Distance covered (d) = 12 miles

Time taken (t) = 1.5 hour

Average speed :

[tex]v = \dfrac{d}{t} [/tex]

[tex]v = \dfrac{12}{1.5} [/tex]

[tex]v = 8 \: \ \: mph[/tex]

average speed = 8 mph

Answer:

8mph

Speed= Distance/Time

12/1.5= 8mph

Please what is the answer?

Answers

Answer: scale to measure the weight

Step-by-step explanation:

x-1/2=x-2/3 solve the proportion

Answers

Answer:

0 = − 1 /6

Step-by-step explanation:

Answer:

0

Step-by-step explanation:

To find the value of x, we first find the fraction that is equivalent to 1/3 that has a denominator of 12.

Multiplying or dividing the numerator and denominator of

a fraction by the same number will give us an equivalent fraction.

So if we multiply both the numerator and denominator of

the first fraction by 4, we can see that 1/3 = 4/12.

So the value of x must be 4.

Look at the figure. How can you prove the triangles are congruent?

A) it is not possible to determine if the triangles are congruent

B) ABD = CBD by the SSS postulate

C) ABD = CBD by the SSS postulate

Answers

Answer:

Δ ABD ≅ Δ CBD  SSS

Step-by-step explanation:

AB ≅ CB                  Given                                

AD ≅ DC                  Given                                

BD ≅ BD                  Reflexive property      

Δ ABD ≅ Δ CBD      SSS      

need help for 20 points.....plzzzzz



a^2/16-5ab+100b^2

Answers

is it factorization ...

Same I have the same problem

A family of 2 adults and 3 children goes to a play . admission costs $8per adults and $5 per child. what expression would show the total admission cost for the family

Answers

Answer:

8 + 8 + 16 5 * 3 is 15 16 + 15 is 31 that is the answer to the question

i need help ASAP!! will mark brainliest. I need to find the vertex of this problem but i don’t know how to work/solve it, pls help! thanks!!

Answers

the answer is b i took the quiz

Use a property of equality to solve this equation:

4.5x = 18

x =

Answers

Answer:

4

Step-by-step explanation:

x= 18÷4.5=4

hope it helps

4.5x = 18

step 1: divide both sides by 4.5

x = 18/4.5

x = 4

hellppppppppppppppppppppppppp

Answers

Answer:

⁴/2

Step-by-step explanation:

because is I solveng to be a good

brainliest me

Answer:

Common ratio is - 4 / 2.

Step-by-step explanation:

Sequence = - 2, 4, - 8, 16, - 32, ....

Let the terms be " a ".

Here,

a1 = 2

a2 = 4

a3 = - 8

a4 = 16

a5 = - 32

Let the common ratio be " r ".

r1 = a2 / a1

= 4 / - 2

r1 = - 2

r2 = a3 / a2

= - 8 / 4

r2 = - 2

r3 = a4 / a3

= 16 / - 8

r3 = - 2

r4 = a5 / q4

= - 32 / 16

r4 = - 2

Since, the common ratios are same,

Therefore, r = - 2

- 4 / 2 = - 2

So, - 2 can also be written as - 4 / 2.

Hence,

r = - 4 / 2

Finally,

Common ratio ( r ) = - 4 / 2

I NEED HELP ON 1 PLEASEEE

Answers

Answer:

C

Step-by-step explanation:

SA of a cylinder formula:

A=2πrh+2πr^2

A=2π(3)(15)+2π(3)^2

A=339.29in^2

Hope that helps

Answer:

Step-by-step explanation:

Hi there!

From the given figure;

Radius(r) = 3 inch

Height (h) = 15 inch

Now;

Total surface area (TSA) = 2πr(r+h)

                              TSA = 2*([tex]\frac{22}{7}[/tex])*3(3+15)

                               TSA = [tex]\frac{132}{7}[/tex]*18

                               TSA = 339.42in².

Therefore,  the answer is option c (339.29in²).

Hope it helps!

greatest common factor of 5, 6 and 15

Answers

Answer:

1

Step-by-step explanation:

As you can see when you list out the factors of each number, 1 is the greatest number that 5, 6, and 15 divides into.

If 134n = 54eight , calculate n​

Answers

sorry what does 54eight mean?

The value of 'n' is approximately 4.0896.

To calculate the value of 'n' in the equation 134n = 548, we can isolate 'n' by dividing both sides of the equation by 134.

134n = 548

Dividing both sides by 134:

n = 548 / 134

Evaluating the division:

n ≈ 4.0896

Therefore, the value of 'n' is approximately 4.0896.

To know more about value, refer here:

https://brainly.com/question/29135849

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Complete Question:

If 134n = 548, calculate n​.

967 times 24 equals?

Answers

Answer:

23,208 is the final answer.

Hope this helps!

Answer:

23,208

Hopefully this is correct

Find the area of the metal sheet below that is required to make this square-shaped traffic sign. (note: square the binomial)

Answers

(7x-4)^2= 49x^2-56x+16
Hope this helps

Fine a number such that half of the number is 4 more than 6.​

Answers

Answer:

20

Step-by-step explanation:

20 / 2 = 10

10 - 4 = 6

4 more than 6 = 4 + 6 = 10

The number’s half is 10 therefore the number is 10 x 2 = 20

Answer = 20!

person who answers this gets brainliest
If Manny the Martian's shadow is 17.5 ft. in length and the shadow of a yard stick sitting perpendicular to the ground is 7.5 ft., what is Manny's height?
A 8 ft
B 5.5 ft
C 6 ft
D 7 ft

Answers

Answer:

letter B.

Step-by-step explanation:

5.5ft

hope it helps you

Please help! Algebra question see picture...

Marking Brainliest!

Answers

Answer: G is -1/3

Step-by-step explanation:

Find the value of x. 50° 83° X​

Answers

Answer: trap house

Step-by-step explanation:

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