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
expeople1 [14]
2 years ago
14

Please help which one is it!!

Mathematics
2 answers:
Lelu [443]2 years ago
7 0

Step-by-step explanation:

what the other answer tries to say :

you keep the cubic root on one side, and you combine all other terms (here with 5 and 7 only constants) in the other side :

-cubic root(x² - 9) = 2

now we put both sides to the power of 3 and we get

-(x² - 9) = 8

remember, putting a negative number to an odd power (like 3 or 5 or 7 or ...) delivers as result again a negative value.

and now, I think, the other answer made a mistake. that happens, when you don't write down your thoughts.

so,

-(x² - 9) = 8

-x² + 9 = 8

-x² = -1 (and NOT -17)

x² = 1

x = 1 and x = -1

remember, squaring a negative number delivers the same result as squaring the same positive number. therefore, the square root has always 2 solutions : a positive and a negative one.

so, the right answers are the second and the third ones.

sasho [114]2 years ago
6 0
Last one and first. You can find out why by isolating the cube root and cubing both sides.
You might be interested in
Explain this to me pleaseeeee
Liula [17]
Wow what grade you in??
3 0
3 years ago
May someone please help me out on this question
NISA [10]

Answer:

A

Step-by-step explanation:

It's hard to see but when x is 6, y is 4.5. Just plug that into each equation and see which one is correct.

x^{2} =8y\\x=6;y=4.5\\6^{2} =8(4.5)\\36=36

8 0
3 years ago
HELP PLEASE 80 POINTS
alexgriva [62]

Answer:

  • x = 15/p
  • x = -3

Step-by-step explanation:

<h3>Given</h3>
  • 4(px + 1)=64
<h3>Find</h3>
  • Solve for x
  • Find x when p = -5
<h3>Solution</h3>
  • 4(px + 1) = 64
  • 4(px + 1)/4 = 64/4
  • px + 1 = 16
  • px = 15
  • x = 15/p

<u>When p = -5, substitute p:</u>

  • x = 15/p
  • x = 15/(-5) = -3
4 0
3 years ago
Read 2 more answers
Suppose a subset of eight different days of the year is selected at random. What is the probability that each day is from a diff
goldfiish [28.3K]

Answer:

P = 0.05

Step-by-step explanation:

12 months * 30 days each = 360 days

From 306 days, we have to select 8 days = 360C8 ways(Total ways)

We want each days from different month. First, we have to select 8 month from 12 month = 12C8 ways

---By selecting 8 month, we will select a days from each month. That can be done in = 30C1 * 30C1 * .................30C1 (8 ways) [From a month with 30 days, we can select a day in 30C1 ways = 30 ways]

Therefore P = Number of ways of selecting each days from different month / Total number of ways

P = 12C8 * 30^8 / 360C8

P = 495 * 656100000000 / 6469697679132645

P = 0.0501985588982791

P = 0.05

Hence the probability that each day is from a different month is 0.05

6 0
3 years ago
Disney World offers an incentive on their opening day.
myrzilka [38]

Answer:

Step-by-step explanation:

The answer would be to find the LCM of both 3 and 5, which is 15. The 15th customer would receive both a mug and a t-shirt. Let's call mugs "x" and shirts "o" and line them up. The bold x's and o's are the lucky winners:

x  x  x  x  x  x  x  x  x  x  x  x  x  x  x

o  o  o o o  o  o  o o  o  o o  o  o  o

The last x and the last o are both bold for the first time right there, at the 15th letter of each.

4 0
3 years ago
Other questions:
  • (2m+3)(4m-3)=0 solve by factoring
    15·1 answer
  • Place values and whole number
    10·1 answer
  • julie goes to the park across the street from her house several times a day and jogs a total of six miles every day. she jogs th
    9·1 answer
  • Write an equation for: melissa has 6 times as many quarters as Michelle. Together they have 896 quarters. How many quarters, q,
    6·1 answer
  • A)125<br> B)130<br> C)120<br> D)135
    12·2 answers
  • Which expression is equivalent to 3/ x^5y <br><img src="https://tex.z-dn.net/?f=%20%5Csqrt%5B3%5D%7B%20%7Bx%7D%5E%7B5%7Dy%20%7D%
    14·2 answers
  • The measure of ∠BAC is π/3 radians and the measure of ∠CAD is π/2 radians. What is the measure of ∠BAD?
    14·1 answer
  • Find the reference angle! I NEED HELP ASAP PLS!
    9·1 answer
  • Write each power as a product of the same factor then find the value of 10 power 6
    9·1 answer
  • 100 people planned to run to raise funds for a charity. Twenty percent of them ran 3 miles, two-fifth ran 6 miles, and the rest
    5·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!