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
Rufina [12.5K]
3 years ago
10

Solve by completing the square! (will give brainlist for work).n ^ 2 + n - 30 = 0

Mathematics
1 answer:
Masja [62]3 years ago
8 0

Answer:

n = 5, -6

Step-by-step explanation:

Ur welcome

You might be interested in
Please help me on this
Readme [11.4K]

For this case we have to define root properties:

\sqrt [n] {a ^ n} = a ^ {\frac {n} {n}} = a

In addition, we know that:

a ^ {- 1} = \frac {1} {a ^ 1} = \frac {1} {a}

On the other hand:

4 ^ 2 = 16

Thus, we can rewrite the given expression as:

\sqrt {4 ^ 2 * a ^ 8 * \frac {1} {b ^ 2}} =\\4 ^ {\frac {2} {2}} * a ^ {\frac {8} {2}} * \frac {1} {b ^ {\frac {2} {2}}} =\\4 * a ^ 4 * \frac {1} {b}

ANswer:

Option B

3 0
3 years ago
Can someone help me with these please
Savatey [412]

Answer:

the answer is cubes curve

4 0
3 years ago
Simplify: 4 square root of 2 plus square root of 18 minus square root of 9
Ket [755]
I hope this helps you

5 0
3 years ago
A supervisor records the repair cost for 14 randomly selected refrigerators. A sample mean of $79.20 and standard deviation of $
Nitella [24]

Answer:

( $74.623, $83.777)

The 90% confidence interval is = ( $74.623, $83.777)

Critical value at 90% confidence = 1.645

Step-by-step explanation:

Confidence interval can be defined as a range of values so defined that there is a specified probability that the value of a parameter lies within it.

The confidence interval of a statistical data can be written as.

x+/-zr/√n

Given that;

Mean x = $79.20

Standard deviation r = $10.41

Number of samples n = 14

Confidence interval = 90%

Using the z table;

The critical value that should be used in constructing the confidence interval.

z(α=0.05) = 1.645

Critical value at 90% confidence z = 1.645

Substituting the values we have;

$79.20+/-1.645($10.42/√14)

$79.20+/-1.645($2.782189528308)

$79.20+/-$4.576701774067

$79.20+/-$4.577

( $74.623, $83.777)

The 90% confidence interval is = ( $74.623, $83.777)

5 0
3 years ago
Draw a graph of Lin's distance of a function of time for this situation:
Pavlova-9 [17]

Step-by-step explanation:

Given

Lin walks half a mile at a constant rate i.e. Lin velocity is constant. So, in the graph, it will be a straight line through the origin.

Lin is still for five minutes and after she began sprinting for the slip up to halfway i.e. Lin is accelerating or velocity is increasing for the halfway and later she started walking for the rest of the way.

3 0
2 years ago
Other questions:
  • Square root of 64 over 25
    14·2 answers
  • Evaluate x-y/5 when x is 23 more than 3 times y and y=6
    12·1 answer
  • How would you solve 7w+12-2w=-3?
    7·1 answer
  • Which function can be used to model the monthly profit for x trinkets produced?
    15·1 answer
  • Simplify radicals Problems attached please help!!!
    11·1 answer
  • This is 10 points plz help ( NO LINKS )
    11·1 answer
  • 8y + 7y <br> in standard form
    15·1 answer
  • Give me the right answer please i will give u half of my points i have 320 pleaseee im in a test rn
    10·2 answers
  • 1. Ashley read a book for 7 days in a row. Each day she read 60
    6·1 answer
  • why does it take more cubes with 1 3 unit side lengths to fill the prism than it does with cubes with 1 2 unit side lengths
    6·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!