Mathematics High School

PLEASE ANSWERRRRRRRR!!!
What is the value of, when x^2+5=21?

Have a good day!!

Answers

Answer 1

Answer:

x= 4 or -4

Step-by-step explanation:

take the root of both sides then solve

hope this helped♥

Related Questions

Please Help please please

Answers

Answer:

5.25

Step-by-step explanation:

Take the distance between the two points and divide by 2.

The distance between the two is 10.5 (9.1-(-1.4))

Divide by two to find the midpoint.

Answer: 3.85

Step-by-step explanation:

find the mean of the 2 numbers, that is the midpoint.

help me No wrong answer

Answers

9x - 9
3x - 3
x^3 - 1

Evaluate the expression for x = 2 and y = 4. Enter your answer in the box.

16x0 + 2x2 • y –1

Answers

Answer:

31

Step-by-step explanation:

PEMDAS

16(2) * 0.

32 * 0

=0

2(2) * 2

=8

8 * 4 - 1

32 - 1 = 31

Answer:

Its 6. Trust me.

Step-by-step explanation:

4 -2x plus 5 when x =4

Answers

Answer:

1

Step-by-step explanation:

f(4)=4-2x+5

4-2(4)+5

4-8+5

1

Answer:

x=1

Step-by-step explanation:

4-2x+5

x=4 so substitute the x with 4.

4-2(x)+5

=1

helppppppansjfnnsnwkgn

Answers

Answer:

the third one P N M

Step-by-step explanation:

Answer:

NPM

Step-by-step explanation:

i got you fammmmmmmmm

Which is the solution to the equation 8.25 + one-fourth w = 10.75? Round to the nearest hundredth if necessary.

Answers

Answer:

w=10

Step-by-step explanation:

8.25+1/4w=10.75

8.25+0.25w=10.75

0.25w=10.75-8.25

0.25w=2.5

w=10

I hope this helps

Answer:

C/10

Step-by-step explanation:

Isabella is ordering pizza for a family dinner. If 2 pizzas will feed 4 people, how many pizzas does she need to order for 12 people?

Answers

Answer:

She needs to order 6 pizzas.

Step-by-step explanation:

(My bad I thought it was one pizza that fed 4 people not two)

Answer:

6 pizzas

Step-by-step explanation:

2pizza=4 people

12/4=3

3*2=6

what is the slope of a line that passes through points (2,4) and (3,8)

Answers

Answer:

Slope = 4

Step-by-step explanation:

(2, 4)  ; (3, 8)

Slope= [tex]\frac{y_{2}-y_{1}}{x_{2}-x_{1}}[/tex]

         [tex]= \frac{8 - 4}{3 - 2}\\\\= \frac{4}{1}\\\\= 4[/tex]

30 inches in centimetres

Answers

Answer:

76.2 cm

Step-by-step explanation:

If you convert, said inches, it wouldn't be an exact number, but it would equal 76.2.

what is an equation of the line that passes through the points (-2,1) and (-8,4)​

Answers

Answer:

y = -1/2 x

Step-by-step explanation:

slope = Δy / Δx

= 4 - 1 / -8 - (-2)

= 3 / -6

m = - 1/2

y = mx + b

1 = (-1/2)(-2) + b

1 = 1 + b

b = 0

eqn of the line : y = -1/2 x

Consider this system of equations and the partial solution below.

6 x + 2 y = 6.
7 x + 3 y = 9.

Multiply the first equation by –3.
Multiply the second equation by 2.
Add the resulting system of equations.

Which terms will cancel when you add the resulting system of equations?

Answers

The first equation will turn into -18x -6y = -18, and the second equation will turn into 14x + 6y = 18. The y terms will cancel out when you add the equations together.

Answer:

A

Step-by-step explanation:

what is -9/4 divided by -4/9

Answers

Answer:

Step-by-step explanation:

-9/4 ÷ -4/9= -9/4 x - 9/4=-81/16= 5    1/16

Hope this helps !

The price of an item has been reduced by 10%. The original price was $46. Find the price of the item now.

Answers

41.4

Step-by-step explanation:

Hope this helps ∞<3

let me know if its right or wrong

Someone please help me!!

Answers

Sorry the question isn’t loading on my screen

EASY MATH PROBLEM!
Please help me! Will mark brainliest for sure!

Answers

Answer:

A

Step-by-step explanation:

Answer:

The answer would be A

Step-by-step explanation:

Use the formula for |A| <= B which is: -B <= A <= B

For this example you would do:

1. Insert the numbers into the formula: -6 <= 2x - 8 <= 6

2. first do the math for -6 <= 2x-8 which is 1 <= x

3. then do the math for 2x - 8 <= 6 which is x <= 7

4. Put that together and you get 1 <= x <= 7

Good luck on the other questions!

Simplify completely 4m^3 over 3m^2n X 9n^2 over 30m^2n^2

Answers

Answer:

The answer is  2/405Xmn with an exponent of 5 at the end

sue has 2 cats.
each cat eats 1/4 of a tin of cat food each day
sue buys 8 tins of cat food
has sue bought enough cat food to feed her 2 cats for 14 days?

Answers

Yes sue bought enough cat food

Solve the system of equations.
2x+8y=6
-5x-20y+-15

Answers

Answer:

2x+8y=6

Step 1: Add -8y to both sides.

2x+8y+−8y=6+−8y

2x=−8y+6

Step 2: Divide both sides by 2

[tex]\frac{2x}{2}[/tex] = [tex]\frac{-8y+6}{2}[/tex]

x=−4y+3

_________________________________________________________

−5x−20y−15

There are no like terms.

Answer:

=−5x−20y−15

*please be serious *
*Solve for y*

Answers

Answer:

y = + 4

Step-by-step explanation:

I used an online algebra calculator to check my answer, so you can trust that this is correct.

Answer:

y=x+4

Step-by-step explanation:

2y=2x+8

Divide everything by 2y

y=x+4

Pluto has an average distance from the sun of 3.6 x 10^8 miles venus has an average distance from the sun of 9.0 x 10^6. How many times greater is pluto's average distance from the sun than venus?

Answers

Answer:

40 times greater

Step-by-step explanation:

Given the following:

Pluto average distance from the sun Ps =  3.6 x 10^8 miles

venus average distance from the sun Vs = 9.0 x 10^6miles

Take the ratio:

Ps/Vs = 3.6 x 10^8/9.0 x 10^6

Ps/Vs = 0.4*10^{8-6}

Ps/Vs = 0.4*10²

Ps/Vs = 40

Ps = 40Vs

Hence the pluto's average distance from the sun is 40 times greater than that of venus

HELP!!!! Please help me!!!

Answers

Answer:

The answer you have checked is the correct one.

The record low temperature in Hawaii is -0.15 times the record low temperature in Alaska. The record low temperature in Hawaii is 12°F. What is the record low temperature in Alaska?

Answers

Answer:the record low temperature in Alaska = -80°F

Step-by-step explanation:

Step 1

Let the temperature in Alaska be = x

such that  the temperature in Hawaii be -0.15 times temperature in Alaska = -0.15 x.

Step 2

IF the   record low temperature in Hawaii is 12°F.

Alaska = ??

We know that

Hawaii= -0.15 x temperature Alaska ( 0.15 x)

12°F=-0.15 x temperature Alaska(x)

Temperature of Alaska, x =  12°F/-0.15

= -80°F

Identify the variable in the following situation. Mr. Gopal goes to the store and has 25 dollars. He has to buy some candy bars for 10 dollars total. How water bottles can he buy with his remaining money if each water bottle costs 5 dollars

Answers

Answer:

3 water bottles

Step-by-step explanation:

25-10=15

15/5=3

Line u has a slope of 7/9. Line v is perpendicular to u. What is the slope of line v ?

Answers

Answer:

-9/7 bc the perpendicular is the inverse of the former slope

Step-by-step explanation:

3. The price of a pair of shoes is $64.00 plus 9% sales tax. What is the sales tax on this pair of shoes in dollars and cents? A. $5.76 B. $57.60 $69.716) D. $78.00​

Answers

Step-by-step explanation:

To figure out this answer, you need to figure out how much 9% is in $64.00

  ?              9

-------   =   --------  

 64           100

Now to solve this you have to multiply diagonally and divide the neighbor

(let me explain)

basically in this case, you would multiply 64 and 9, then divide by 100

64 * 9 = 576

576 / 100 = $5.76

In short: your answer is 'A' $5.76

Hope this helps <3

please help!! question in picture

Answers

The answer it 1009999009

What is the value of (7 +21)(3 - i)?

Answers

(7+21)=28

28(3-I)=

28•3 =84

28•I=28i

28/84=3,5

3,5=I

Amanda planned to run 5 kilometers. Instead, she ran 170% of the planned distance,
1 kilometer - 1000 meters
How many meters did Amanda run?

Answers

Answer:

8500 meters

Step-by-step explanation:

5 100

   170

PLEASE HURRY!!!
What is the output of y=6x−11 when the input is 5?

Answers

Answer:

The y-intercept occurs when x = 0, so you can see it is the point: (0, 11).Step-by-step explanation:

(4x + 3y)^2 please tell me the wander ✌️​

Answers

Answer:

16x^2+24xy+9y^2

Step-by-step explanation:

16x^2+24xy+9y^2

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