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
Rama09 [41]
3 years ago
9

What is really answer please help ​

Mathematics
1 answer:
Reika [66]3 years ago
5 0

Answer:

4±√5

EXPLAINED ANSWER:

Since the variable is a binomial and it is squared, we apply square root on both side, and apply the ± sign on the right side (since the solution of a square root can be both positive and negative), and later pass the 4 positive to the other side.

√25 can be (5)(5) or (-5)(-5)

You might be interested in
The lifetime of a leaf blower is exponentially distributed with a mean of 5 years. If you buy a 12 year old leaf blower, what is
snow_tiger [21]

Answer:

1.967 × 10⁻¹¹

Step-by-step explanation:

This is a conditional probability problem

Probability that a 12 year old leaf blower works for 5 more years = Probabilty that a leaf blower works for 17 years, given that it has worked for 12 years = P(17|12)

P(17|12) = P(17 n 12)/P(12)

P(17 n 12) = P(17)

Exponential random variable is given as

f(x) = λ e^(-λ.x)

λ = rate parameter = 5 years per blower

x = variable whose probability is required = 17

f(17) = 17 e^(-5×17)

f(17) = 17 e⁻⁸⁵ = 2.067 × 10⁻³⁶

f(12) = 12 e^(-5×12)

f(12) = 12 e⁻⁶⁰ = 1.051 × 10⁻²⁵

P(17|12) = (2.067 × 10⁻³⁶)/(1.051 × 10⁻²⁵)

P(17|12) = 1.967 × 10⁻¹¹

8 0
3 years ago
What is the GREATEST COMMON FACTOR of 20x2 , 10x , and 15?
irina [24]

Answer:

5

Step-by-step explanation:

x can only go into 20x2 and 10x and 5 is the Gcf of these three numbers

6 0
3 years ago
Read 2 more answers
Which number in the monomial 215x18y3z21 needs to be changed to make it a perfect cube?
hoa [83]
We need to remember that:
                   xyz = (x)(y)(z)
if x, y and z are perfect cubes, then xyz would also be a perfect cube

Also, 
                 (x^n)^m = x^(mn)
if it is a perfect cube, then it can be factored into the expression (x^n)^3, wherein n is a whole number.

All should be a perfect cube, given

215x^18(y^3)(z^21)

By writing the terms separately, we would see which one is to be changed. 

215 = 5*43, we see this is not a perfect cube, we could changed it to 6^3 or 216

x^18=(x^6)^3

y^3=y^3
z^21=(z^7)^3

The other terms are perfect cubes except for the first one. So the correct answer would be the last option, 215 should be changed.
4 0
3 years ago
Read 2 more answers
I need the equation for this ASAP!
Sindrei [870]

Answer:

5.714 liters of the 5% solution and 4.286 of the 40%.

Step-by-step explanation:

Let x be the volume of 40% solution and y = volume of the 5% solution.

x + y = 10

0.40x + 0.05y = 0.20(x + y)

From the first equation x = 10 -y so we have:

0.40(10 - y) + 0.05y = 0.20( 10 - y + y)

4 - 0.40y + 0.05y = 2

-0.35y = -2

y = 5.714 liters of the 5%.

and x =  10 - 5.714 = 4.286  liters of the 40% solution.

Step-by-step explanation:

8 0
3 years ago
Read 2 more answers
As the number of pages in a photo book increases, the price of the book also increases. There is an additional shipping charge o
BartSMP [9]

Let the maximum number of pages Jennifer can have be = x

Amount Jennifer has (P) = $62.10

Given equation is :

P = (20+0.5x)+0.15(20+0.5x)

Price is given = 62.10 , so equation is :

62.10=(20+0.5x)+0.15(20+0.5x)

62.10=20+0.5x+3+0.075x

62.10=23+0.575x

0.575x=39.10

x=68

Hence, Jennifer can have a maximum of 68 pages in her book.

5 0
3 years ago
Other questions:
  • X ^ 4 minus 16 ? factor between two squares
    15·1 answer
  • Can someone help me with this
    14·1 answer
  • A board us 4 ft 8 inches long. how long is the board in inches
    11·1 answer
  • A local Dunkin Donuts makes blueberry muffins that cost $.69 each. Past experience shows that 15% of the muffins will spoil and
    9·1 answer
  • 9-x over 5 = 3 <br> Solve for x
    5·2 answers
  • Where is the vertex of the equation?y = x2 – 18x + 80
    5·1 answer
  • Will give brainliest for thiss
    5·2 answers
  • It takes Emily 18 minutes to finish reading 4 pages of a novel.How many minutes would it take her to finish reading 30 pages
    10·1 answer
  • Evaluate<br> la +b-cl. given a = 5, b = -3, and c = -2. <br><br>O 4 <br>O 10<br>O 0​
    8·1 answer
  • Alex needs to catch a train. The train arrives randomly some time between and , waits for minutes, and then leaves. If Alex also
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!