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
ratelena [41]
3 years ago
11

Help on this question, please

Mathematics
1 answer:
qwelly [4]3 years ago
5 0

Answer:

x = ±sqrt(7)

Step-by-step explanation:

3x^2 + 7 = 28

Subtract 7 from each side

3x^2 + 7-7 = 28-7

3x^2 = 21

Divide by 3

3x^2  /3 = 21/3

x^2 = 7

Take the square root of each side

sqrt(x^2) = ±sqrt(7)

x = ±sqrt(7)

You might be interested in
What is 10^4 in standard notation
NARA [144]

Answer:

10,000

Step-by-step explanation:

Standard notation is just the normal way of writing things. 10 x 10 x 10 x 10 = 10,000.

7 0
3 years ago
Read 2 more answers
-22 - 7 answer the following integers! Show your work
konstantin123 [22]

-22-7=-22+(-7)=-22-7=-29

4 0
3 years ago
Simplify -3(2x-4)+8x-8
ryzh [129]
-3(2x-4)+8x-8
-6x+12+8x-8
2x+4
x=2
3 0
3 years ago
Read 2 more answers
What is the product of 9 and the quantity is 5 more than a number t is less then 6
Artist 52 [7]
The quantity 5 more than a number t is labeled as (5+t) 
Product of 9 and the quantity is labeled as = 9(5+t) which equals 45+9t
Result is less than 6 so the equation becomes
45+9t < 6 
3 0
3 years ago
Ella conducted a survey to find out the amount of time high schoolers spend surfing the Internet. From the data collected, the r
Afina-wow [57]

Answer:

the answer is C

Step-by-step explanation:

The answer is C.

Because we do not have any tables graphs etc., we can only use the fact that the range is 1

The definition of range is the difference between the largest amount and the smallest amount. In equation form, it should look like this:  

Now lets move to the answer choices:

Answer A. is wrong

If everyone surfed for exactly an hour, the largest amount of time would be 1 hour and the smallest amount of time would also be 1 hour. Put this into the equation and the range would be 0 which is contradicted from the data present

Answer B. is wrong because the range is not the average, the mean is the average. We are looking for the range, not the mean so Answer B. is incorrect.

Answer C. is correct. The range is the difference between the largest and the smallest. In this answer, it tells us that the range is the difference between the greatest amount of time and the least amount of time spent surfing the Internet is 1 hour. This follows the term of "Range" and therefore, Answer C. is correct.

Answer D. is incorrect because the range does not have anything to do with quotients.(By the way, a quotient is the result of dividing a dividend with a divisor.) The range is only obtainable with subtraction, not division, so answer D. is incorrect.

please mark as brainliest. l need it to be an ace. please give me if you like it.

5 0
2 years ago
Read 2 more answers
Other questions:
  • A total of
    13·2 answers
  • What figure can be created using the net
    13·1 answer
  • Please answer asap with explanation ​
    15·1 answer
  • 9 Which statement is true? A 0.04 &lt; 0.004 B 8.2 &lt; 8.02 с 7.6 &lt; 7.67 D 0.03 &lt; 0.003​
    15·1 answer
  • Which expression is equivalent to 5 (h + 9)? <br>45 h 14 h 5 h + 9 5 h + 45
    14·2 answers
  • Create the f(x) function based on the table. Answer should be in function notation
    5·1 answer
  • Find the slope given: (3,6) &amp; (11, 6)<br> m =
    15·2 answers
  • Can anyone explain theoretical and experimental portability because math is so difficult
    12·1 answer
  • Please hurry on an exam The formula for calculating simple interest is I = prt. Which is the equivalent equation solved for r?
    15·2 answers
  • 50 POINTS!!! The measures of the angles of a triangle are shown in the figure below. Solve for x.
    5·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!