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
Eva8 [605]
3 years ago
9

Which one is a counter example?

Mathematics
2 answers:
Vilka [71]3 years ago
8 0
^^ very true about that one
netineya [11]3 years ago
6 0

Answer:  Shows that conjectured is always true

Step-by-step explanation:

You might be interested in
Pls open first to answer correctly get brainlist
KengaRu [80]

Answer:

C AND D

Step-by-step explanation:

it is a rational and real number

5 0
3 years ago
Read 2 more answers
The sum of two consecutive even numbers is 54. Find the numbers.
Reil [10]
Hi! the numbers are 26 and 28!

26+(26+2) =54
8 0
2 years ago
Solve equation 3k+45=8k+25
Brrunno [24]

Answer:

k=4

Step-by-step explanation:

First, we can subtract 3k on both sides. It is ultimately easier to start by subtracting the term with a variable. This would result in 45=5k+25. Then, we can subtract 25 on both sides to get closer to isolating k. This becomes 20=5k. We can then divide by 5 on both sides. This means that k=4.

5 0
3 years ago
Read 2 more answers
An open top rectangular box is to be made from a rectangular piece of metal that is 3cm wide and 8cm long by cutting a square fr
Tanzania [10]

Answer:

x  = 0.67 cm

Step-by-step explanation:

Let call  " x " the length of the side of the square to cut from each corner

then the sides of the future box would be

L = 8 - 2x       and   D = 3 - 2x

The volume of the box is:

V = L*D*x

And such volume as function of x is

V(x)  = ( 8 - 2x ) * ( 3 - 2x ) * x     ⇒  V(x)  = ( 24 - 16x - 6x + 4x²) * x

V(x)  =  4x³ - 22x² + 24x

Taking derivatives on both sides of the equation we get:

V´(x) = 12x² - 44x + 24

Then    V´(x) = 0       ⇒   12x² - 44x + 24 = 0    ⇒  3x² -  11x + 6 = 0

We got a second degree equation solving for x

x₁,₂  = [11 ± √ 121 - 72 ] / 6

x₁  = ( 11 + 7 ) / 6         x₁  =  3   we dismiss this solution since according to problem statement  one side would become negative

Then

x₂  =  (  11 - 7 ) / 6    ⇒    x₂  =  4/6      ⇒   x₂  =  0.67 cm

As the second drivative is smaller than 0 then there is a maximun in that point

V´´(x)  = 12x - 44  < 0

Sides of the box

L = 8 - 2x    ⇒  L = 8 - 2*(0.67)   ⇒  L  = 8  - 1.34    ⇒  L = 6.66 cm

D = 3 - 2x   ⇒   D = 3 - 2* (0.67) ⇒  D = 3 - 1.34    ⇒   D = 1.66 cm

Heigh  =  x  = 0.67 cm

V(max) = 6.66*1.66*0.67

V(max) = 7.41 cm³

5 0
3 years ago
Can someone help me on this math problem.
nekit [7.7K]

In the rhombus, the diagonals are perpendicular.

We know, the sum of the measures of the triangle is equal 180°.

Therefore we have the equation:

(2x-15)+3x+90=180

2x-15+3x+90=180        <em>combine like terms</em>

(2x+3x)+(-15+90)=180

5x+75=180        <em>subtract 75 from both sides</em>

5x=105              <em>divide both sides by 5</em>

\boxed{x=21}

<h3>Answer: x = 21°</h3>
4 0
3 years ago
Other questions:
  • Math second grade (plz help me)
    10·2 answers
  • This season, Lisa's lacrosse team has won 2/3 of their home games (games played at Lisa's school), but just 2/5 of their away ga
    15·1 answer
  • A curve which shows the quantities of output that can be obtained from different quantities of a variable factor of production,
    14·1 answer
  • Find the volume of a rectangular prism with base length = 8 ft base width=5ft and height = 2 ft
    14·2 answers
  • Help ASAP please!!!!!!!!!​​
    13·1 answer
  • Find the surface area
    15·2 answers
  • Describe who is responsible for the cost and efficiency variances for direct materials, direct labor, and manufacturing overhead
    6·1 answer
  • Can you make 24 from the numbers 3, 6, 8 and 2, using all the numbers? You can only use the operations: + - x / ( )
    14·1 answer
  • What are the central ideas of this excerpt? Select two options.
    10·1 answer
  • Balancing chemical equations
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!