Mathematics High School

Which statements are true when solving x^2=81

Which Statements Are True When Solving X^2=81

Answers

Answer 1

Answer:

d.) the only solution is 9.

Step-by-step explanation:

The only way to solve this equation is to get the square root:

x^2 = 81

[tex]\sqrt{x^2}[/tex] = [tex]\sqrt{81}[/tex]

x = 9

The square root of 81 is 9 and the square root of x^2 is just x.

Please mark me the brainliest!?!

Answer 2

Answer:nahh , had that question & i picked "D" but it said its E & A.

Step-by-step explanation:

Related Questions

If cos(x)= 3/4 and tan(x), what is cos(2x)?
-3sqroot7/8
-1/8
1/8
3sqroot7/8

Answers

Answer:

The answer is 1/8 or C.

Step-by-step explanation:

I know this is correct because I got it right on edge 2021.

**please mark brainliest!**

.The value of cos(2x) is 1/8

What is Trigonometry?

Trigonometry is a branch of mathematics that studies relationships between the sides and angles of triangles.

Given:

cos x = 3/4

Using identity,

cos 2x = 2 cos^2 (x)-1

=2(3/4*3/4)-1

=2*9/16-1

=9/8-1

=1/8.

Learn more about trigonometry here:

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It was 12°C when Preston got home from school.
The weather report shows a storm front moving
in that will drop the temperature by 17°C. What
is the expected temperature

Answers

Answer:

-5 degrees C

Step-by-step explanation:

drop indicates minus

12-17=-5

-5 degrees C

The circumference of a circle is 18 feet. What is the area

Answers

Answer:

18

Step-by-step explanation:

it does not have an area its an circle so it just 18 feet

really want a crown

The tank in Sabina’s car hold 12.7 gallons of gasoline. Currently, the gas tank is 3/4 full. How much gasoline is in the car’s tank? Round your answer to the nearest tenth.

Answers

Answer:

9.5 gallons

Step-by-step explanation:

12.7 x .75

multiplying by .75 is the easiest way to get 3/4 of something

Whats the domain and range

Answers

Answer:

Another way to identify the domain and range of functions is by using graphs. Because the domain refers to the set of possible input values, the domain of a graph consists of all the input values shown on the x-axis. The range is the set of possible output values, which are shown on the y-axis.

Step-by-step explanation:

i need to solve the literal equation for 6 - 3y = -6

Answers

Answer:

4

Step-by-step explanation:

Answer:

4

Step-by-step explanation:

Find the circumference of the circle to the nearest
tenth. Use 3.14 for T.
28 m

Answers

Answer:

I wish I've known, but try using Symbo-Lab or Math-Way. They help a lot.

Step-by-step explanation:

The circumference is 56×3.14 (175.9)

can you help find the missing value​

Answers

Answer:

a

Step-by-step explanation:

cause I had this question

the x value is 4. if you plug the equation into desmos you can find that point on the graph

Order these from greatest to least:
0.009 m, 12 cm, 8 nm, 5 x 10^-1 m

Answers

8 nm, 0.009m, 12cm, 5 x 10^-1m

14y - (y - 2) + 5(y + 9)

Answers

Answer:

=18y+47

Step-by-step explanation:

Let's simplify step-by-step.

14y−(y−2)+5(y+9)

Distribute:

=14y+−y+2+(5)(y)+(5)(9)

=14y+−y+2+5y+45

Combine Like Terms:

=14y+−y+2+5y+45

=(14y+−y+5y)+(2+45)

=18y+47

Answer:

y = -2 11/18 or y = -2.6111 repeating

Step-by-step explanation:

14y -(y - 2) + 5(y + 9)

    Distribute the negative (-) to (y - 2)

    Distribute the five (5) to (y + 9)

14y -y + 2 + 5y + 45

    Combine like terms

18y + 47 = 0

       -47 = -47

18y = -47

18y/18 = -47/18

y = -2 11/18

Hope this helps! :)

Choose Yes or No to tell if the number 80 will make each equation true.
320 ÷ □ = 40
Choose...


4,800 ÷ □ = 60
Choose...


7,200 ÷ □ = 900
Choose...


16,000 ÷ □ = 200
Choose...

Answers

Answer:

No : 8

Yes : 80

No : 8

Yes : 80

Answer:  

Only the second and the fourth option that is true

Step-by-step explanation:

Persephone is creating a flower garden in her back yard. If she needs 30 pounds of soil per square foot of the flower garden, how much soil will Persephone need to create her garden? (19 by 8)

Answers

Answer:

4,560 pounds of soil per square foot

Step-by-step explanation:

19 × 8 = 152

152 × 30 = 4,560

Which of the following choices is NOT GEOMETRIC SEQUENCE.

a.
2, -4, 8, . . .


b.
8, 2, 0.5, . . .


c.
1/2, 1/6, 1/18, . . .


d.
-7, -2, 3, . . .​

Answers

B is not a geometric sequence

Helppppp pleaseeeeee!!!!!!!???????

Answers

I believe the answer is $2.12 (rounded to the nearest cent) explanation: divide the price by the pound for each candy then subtract.

7) Joey is four years older than Billy. The sum of
their ages is 24.
a) Write a system of equations to represent
this situation. Let j=Joey's age and
b=Billy's age.
b) Solve to determine the age of both Billy and
Joey

Answers

Answer:

Joey is 14, Billy is 10.

Step-by-step explanation:

The system of equations you can use is:

j=b+4

j+b=24

(b+4)+b=24

2b+4=24

2b=20

b=10

j=10+4

j=14

Answer: j+b=24

J=b+4

Step-by-step explanation: (b+4) + b=24

You’re going to substitue J=b+4 into j+b=24

you’re going to get joeys age 14, Billy’s age 10


Erin already has 7 plants in her backyard, and she can also grow 2 plants with every seed
packet she uses. Write an equation that shows the relationship between the number of seed
packets s and the total number of plants p

Answers

The answer is p=2s+7. Two plants can be grown from each seed packet, and Erin already has seven plants so you add that to the equation as well.

The explicit rule for a sequence and one of the specific terms is given. Find the position of the given
term
f(n) -(3n-3)+3;72

25 is the BLANK th term

Answers

Answer:

24th term

Step-by-step explanation:

The value of the nth term is 72. Then the position of the nth term will be 24.

What is an arithmetic sequence?

A series of integers called an arithmetic succession or arithmetic chain of events has a fixed difference between the terms.

Let a₁ be the first term and d be a common difference.

Then the nth term of the arithmetic sequence is given as,

aₙ = a₁ + (n - 1)d

The explicit rule for a sequence and one of the specific terms is given.

fₙ = (3n - 3) + 3

If the value of the nth term is 72. Then the position of the term is given as,

72 = (3n - 3) + 3

72 = 3n - 3 + 3

72 = 3n

n = 72 / 3

n = 24

The value of the nth term is 72. Then the position of the nth term will be 24.

More about the arithmetic sequence link is given below.

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Maria's dinner bill is $21.89 after tax. If she wants to leave a15% tip, what will the total cost of the dinner be?a. $24.22b. $3.28c. $18.61d. $25.17

Pls answer quick!

Answers

Answer:

d

Step-by-step explanation:


If turkey costs $6.36 per pound, what will be the total cost of 2.5 pounds of turkey?

Answers

Answer:

$15.90

Step-by-step explanation:

$6.36(2.5)=15.90

multiply price per pound times 2.5.

A trail mix has 16 cups of raisins, 3 cups of dates, 24 cups of peanuts, and 2 cups of cashews. Which
Ingredients are in the same ratlo as cashews to raisins

Answers

cashews: raisins = 2:16= 1:8

dates : peanuts = 3:24= 1:8 so the answer is dates and peanuts!

Find the value of 8724 - 3568

Answers

Answer:

10312 i think

Step-by-step explanation:

Which of the following is not a benefit of increased physical activity?
Select one:
O a. Sleep Better
O b. Less Energy
O c. Improved Mood
O d. Improved Health

Answers

Answer:Less energy

Step-by-step explanation:Because if you don't have alot of energy in you you'll be tired and cant move that much if that makes since.

Answer is  b. Less Energy is not a benefit of increased physical activity.

What is physical activity?

Physical activity refers to all movement including during leisure time, for transport to get to and from places, or as part of a person's work.

here, we know that,

not a benefit of increased physical activity is Less Energy.

Because if you don't have a lot of energy in you you'll be tired and cant move that much if that makes since.

Hence, Answer is  b. Less Energy is not a benefit of increased physical activity.

To learn more on physical activity click:

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The endpoints of RS are R: (9,-4) and S: (2, -8).
Which are the coordinates of the midpoint of RS?
A (11-2
B: (1. –6).
c (3,-2)
D (-6)

Answers

Answer:

B, (11/2,-6)

Step-by-step explanation:

to get the midpoint of two endpoints, simply take the average of each corresponding coordinate

midpoint: ((Rx+Sx)/2,(Ry+Sy/2)).

((9+2/2),(-4+-8/2)) = (11/2,-12/2) = (11/2,-6)

the midpoint formula in general is : ((x+x1)/2),(y+y1)/2))

where x1 is the initial or first x coordinate, y1 is the initial or first y coordinate, x is the second, last, or final x coordinate. and y is the second, last, or final y coordinate.


What is the inverse of the function y = 2x - 3?

Answers

Answer:

f^-1(x)=[tex]\frac{x}{2}[/tex]+[tex]\frac{3}{2}[/tex]

Step-by-step explanation:

What is the value of x? PHOTO INCLUDED/WILL MARK BRAINLISET!!!!

Answers

Answer:

1. x = 6.5

2. x = 5

Step-by-step explanation:

I’m really confused please help!

Answers

Answer:

yes

Step-by-step explanation:

i did this last week

Answer:

Yes, it is.

Step-by-step explanation:

A bike was reduced by 20% in a sale.
If its sale price was £520, what was its original price?

Answers

Answer:

416

Step-by-step explanation:

Answer:

£500

Step-by-step explanation:

Can someone help me with my warmup ? Will greatly appreciate it !

Answers

Answer:

E

Step-by-step explanation:

basically if you do a graph y will start at 5 always because the entrance fee never change. then 0.6 equal 60 cents and since it's per pound you will multiple with x (how many pounds)

Answer:

E.

Step-by-step explanation:

Because it is 0.60 PER pound and an extra $5 so the equation would be C=0.60x+5

pose that the function f(x) - 5.32 +0.80x represents the cost of mailing an
ect that weighs x pounds. How much would it cost to mail an object that
ghs 36 pounds?
te: express the answer in dollars.cents)

Answers

Answer:

$34.12

Step-by-step explanation:

The expression for the total cost of a mail is given as

f(x) - 5.32 +0.80x, where x is the amount of weight in pounds

Given that x= 36 pounds we can find the cost of mailing 36 pounds of ect

hence let us put x=36 in the expression to find the total cost

f(x) =5.32 +0.80(36)

f(x) =5.32 +28.8

f(x) =34.12

Therefore the cost of mailing 36 pounds of ect is $34.12

I need help(explanation) on how to find h and m. I will give 12 points!​

Answers

Answer:

h= 44 degrees

m= 45 degrees

I think this is the answer

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