1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
kogti [31]
2 years ago
9

Which are solutions to the following equation? x^2=21

Mathematics
1 answer:
creativ13 [48]2 years ago
4 0

Answer:

x

=

±

√

21

Explanation:

To find

x

2

you have to find the square root of

21  x = ± √ 21 ≈ ± 4.5286

Step-by-step explanation:

You might be interested in
Answer if you have a big brain 96 POINTS
nordsb [41]

Answer:

1) 2x+7

2) -3x+11

3) 0.75x-2

4) -2x+0

5) -1.5x+2

6) -4x+16

Step-by-step explanation:

1) y = mx + c

m = 2 when x=1 , y=9

9 = 2(1)+c

c = 7

y = 2x + 7

2) m = -3

When x=4, y= -1

-1 = -3(4) + c

c = -1+12 = 11

y = -3x + 11

3) m = 0.75

When x= -4, y= -5

-5 = 0.75(-4) + c

-5 = -3 + c

c = -2

y = 0.75x - 2

4) m = (y2-y1)/(x2-x1)

m = (2-(-6))/(-1-3) = 8/-4 = -2

y = -2x + c

When x= -1, y= 2

2 = -2(-1) + c

2 = 2 + c

c = 0

y = -2x + 0

5) m = (-10-(-4))/(8-4)

m = (-10+4)/4 = -6/4 = -1.5

y = -1.5x + c

When x= 4, y= -4

-4 = -1.5(4) + c

-4 = -6 + c

c = 2

y = -1.5x + 2

6) m = (-4-4)/(5-3) = -8/2 = -4

When x= 3, y= 4

4 = -4(3) + c

4 = -12 + c

c = 16

y = -4x + 16

8 0
3 years ago
Read 2 more answers
The current of a river is 4 miles per hour. A boat travels to a point 30 miles upstream and back in 4 hours. What is the speed o
Kobotan [32]

If it took 4 miles per hour you multiply that twice cuss its traveling back then forth so you repeat the same process 30 miles times 2 which is 60 hope this helps.

5 0
3 years ago
Simplify. 310−−√ please help me
slava [35]

Answer:

17.606

Step-by-step explanation:

root of 310  = 17.606

5 0
2 years ago
Read 2 more answers
The farmer loaded 525 potatoes into 7 boxes. He put the same number of potatoes in each box. How many potatoes are in each box?
Lunna [17]

Answer:

75

Step-by-step explanation:

525/7=75

5 0
3 years ago
Write your own story problem using mixed numbers. show the solution
Gala2k [10]

Leah is baking a cake. The cake needs 1 2/8 of flour and 4 6/8 of sugar. Add the ingredients together. The answer is 4
3 0
2 years ago
Other questions:
  • CHECK ANSWERS -
    15·1 answer
  • Math Help Please!!!!!!!
    8·1 answer
  • Find the Volume of a rectangular box (cuboid) with length = 2ab, breadth = 3ac and height = 2ac is given.
    11·1 answer
  • Mandy has a 10.2-ounce container of mustard. She uses 130 of the mustard to put on her hot dog each time. How many ounces of mus
    7·1 answer
  • Help me pleaseeee I need it
    5·2 answers
  • If T= F and F=ma Solve for m when T=10& a=2
    12·1 answer
  • Which statement best describes the relationship between x and y in the equation y = 6 + x?
    9·1 answer
  • A crew of highway works paved 1/5 mile in 1/8 hour if they work at the same rate how much will they pave in one hour
    15·1 answer
  • Part B What is the perimeter in units, of polygon UVWXYZ? Enter your answer in the box​
    9·1 answer
  • Find the height of a triangle with base 4 cm and area 20 cm2.<br> cm
    6·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!