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
blondinia [14]
3 years ago
5

HELPPPP PLEASE. Ill give a brainliest I guess

Mathematics
1 answer:
Mariulka [41]3 years ago
3 0

Answer: It’s D. I got this on my test, I also multiplied to be sure.

You might be interested in
Element X decays radioactively with a half life of 15 minutes. If there are 600 grams
alexdok [17]

Answer: t = 16.49304 ≈ 16.5 minutes

Step-by-step explanation: I pressed see solution

6 0
2 years ago
Solve the equation x^13-2x^12-x^11+2x^10=0 in the real number system
Lemur [1.5K]

Answer:

x= -1,  x=1  and x=2

Step-by-step explanation:

The equation is;

x^{13} -2x^{12} -x^{11} +2x^{10} =0

Using a graph tool to graph the equation and identify the solution you will have;

x= -1,

x=1

x=2

Check answers

when x=2

2^{13}-2(2^{12} )-2^{11} +2(2^{10} )\\\\\\2^{13} -2^1(2^{12} )-2^{11} +2^1(2^{10} )\\\\\\2^{13} -2^{13} -2^{11} +2^{11} =0

7 0
3 years ago
Marcie solved the following inequality, and her work is shown below:
Cerrena [4.2K]

When dividing an inequality with a negative value , the inequality sign changes direction.

The original Less than or equal to sign should heave been changed to greater than or equal to.

The answer is: When dividing by −8, she did not change the direction of the sign.

6 0
3 years ago
On what interval is the functioning decreasing m(x)=4x^3-5x^2-7x?
Verdich [7]
M(x) = 4x^3 - 5x^2 - 7x
Let us first find the zeros of the function.
That is when it is equal to zero.

m(x) = 4x^3 - 5x^2 - 7x  = 0
x(4x^2 - 5x - 7) = 0.  Therefore x = 0 or 4x^2 - 5x - 7 = 0.
Using a quadratic function calculator to solve 4x^2 - 5x - 7
x = 2.09, -0.84
Therefore the zeros are x =-0.84, 0, 2.09 for the function m(x).

The intervals observed are imagining  that the zeros are on the number line:
x<-0.84,    -0.84<x<0,  0<x<2.09,  x>2.09.

For each of this range we would test the function with a number that falls in the range.

The function is decreasing in the interval where it is less than 0.
For x<-0.84, let us test x = -1, m(x) = 4x^3 - 5x^2 - 7x = 4(-1)^3 - 5(-1)^2 - 7(-1) = -4 -5 +7 = -2,    -2 < 0, so it is decreasing here.

For  -0.84<x<0, let us test x = -0.5, m(x) = 4x^3 - 5x^2 - 7x = 4(-0.5)^3 - 5(-0.5)^2 - 7(-0.5) = -0.5 -1.25 +3.5 = 1.75,  1.75 >0. It is not decreasing.


For  0<x<2.09, let us test x = 1, m(x) = 4x^3 - 5x^2 - 7x = 4(1)^3 - 5(1)^2 - 7(1) = 4 -5 -7 = -8,  -8 <0. It is decreasing.

For  x>2.09, let us test x = 3, m(x) = 4x^3 - 5x^2 - 7x = 4(3)^3 - 5(3)^2 - 7(3) = 108 -45 -21 = 42,  42 >0. It is not decreasing.

So the function is decreasing in the intervals:

x < -0.84,  & 0<x<2.09.

4 0
3 years ago
Shapes with 2 pairs of parallel sides
bagirrra123 [75]
Squares and rectangles

5 0
3 years ago
Read 2 more answers
Other questions:
  • Two less than six times the difference of a number and five
    8·2 answers
  • 3b-12=5b-2 please answer I need for homework!!!!
    5·1 answer
  • Help!! This is urgent. I don’t get this
    14·1 answer
  • QF Q2.) Solve the triangle.
    14·2 answers
  • The portion of line that falls between two points is call:
    15·1 answer
  • Answer to the question please
    7·2 answers
  • What is the perimeter of a triangle with sides 12 inches, 9 inches, and<br> 15 inches
    5·1 answer
  • Someone do this for me plz
    5·2 answers
  • 3.75 ÷ 1.50 is equivalent to 375 ÷ 150.<br> The dividend and divisor were both multiplied by
    12·1 answer
  • Can someone please answer this question.
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!