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
lesya [120]
3 years ago
10

Which statement could be proved false using a counterexample?

Mathematics
1 answer:
vagabundo [1.1K]3 years ago
4 0
All acute angles are 30 degrees.
You might be interested in
A is directly proportional to b. When a is 6, b is 72. Find b when a is 8. 3
adelina 88 [10]

Answer:

a)  <em>"K" is proportional Constant   K= 0.0833</em>

<em>b)     The value of b = 99.639</em>

Step-by-step explanation:

<u><em>Explanation</em></u> :-

Given   'a' is directly proportional to 'b'

                     a ∝ b

                <em>  a  =  k b ....(i)</em>

<em>where "K" is proportional Constant</em>

<u><em>Case(i)</em></u><em>:-</em>

<em>when a =6  and b=72</em>

<em>               a  =  k b     </em>

<em>          ⇒ 6 = k (72)</em>

<em>        ⇒  </em>K = \frac{6}{72} = \frac{1}{12} = 0.0833<em>      </em>

<u><em>Case(ii)</em></u><em>:-      </em>

<em> Given  a = 8.3  </em>

<em>           a  =  k b     </em>

<em>⇒   8.3 = 0.0833 ×b</em>

<em>⇒  </em>b = \frac{8.3}{0.0833} = 99.639<em></em>

<u><em>Final answer</em></u><em>:-</em>

a)<em>"K" is proportional Constant   K= 0.0833</em>

<em>b)     The value of b = 99.639</em>

<em></em>

<em></em>

<em></em>

<em></em>

6 0
3 years ago
Y+2x=-1 y= 1/2x+4 value of x
STALIN [3.7K]
X=2

I have an image showing all work

6 0
3 years ago
How can 17/20 and 7/4 make a sum of 9/10
Anika [276]

Answer:

the answer is \frac{35}{20}

Step-by-step explanation:

You have to find the common denominator in order to get the sum.

multiply 5 to \frac{7}{4} and you get \frac{35}{20}

then to double check the sum, subtract it.

\frac{35}{20}-\frac{17}{20}=\frac{9}{10}

hope this make sense :/

6 0
3 years ago
145 is what percent of 620
Oksanka [162]

Hello There!

145 is 23.39% of 620

<u><em>HOW TO SOLVE</em></u>

<u><em></em></u>

<u><em>Equation: Y = P% * X</em></u>

<u><em>We need to solve our equation for "P"</em></u>

<u><em>P% = Y/X</em></u>

<u><em>P% = 145/620</em></u>

<u><em>p = 0.2339</em></u>

<u><em></em></u>

<u><em></em></u>

<u><em>Convert decimal to percent:</em></u>

<u><em>Percent = 0.2339 * 100 = 23.39%</em></u>

4 0
3 years ago
PLEASE HELP !!! CORRECT ANSWER GETS BRAINLIEST!!!!​
shtirl [24]

Answer:

area of this circle: 490.6 inch²

Step-by-step explanation:

area of circle: π(radius)²

Here the diameter is given 25 inch, so the radius will be half: 25/2 → 12.5 in

using the formula:

3.14(12.5)²

490.625 inch²

490.6 inch²____rounded to nearest tenth.

8 0
3 years ago
Read 2 more answers
Other questions:
  • 3x+2y = -7 solve for x any y using substitution
    5·1 answer
  • Setting:
    8·2 answers
  • Which is least 1.3 1 1/3 or 1.34
    5·1 answer
  • What conclusions can you draw from the distances that you recorded in question 7
    8·2 answers
  • What are the solutions of the equation? x² – 21 = –4x
    8·2 answers
  • HELPPP ASAPPP 30 POINTS
    8·1 answer
  • How would you solve for this problem. The line is parallel to the line y=1/2x +5 and passes through (2,-5).
    6·2 answers
  • Describe how to determine the average rate of change between x = 3 and x = 5 for the function f(x) = 3x^3 + 2.
    11·1 answer
  • What is the answer? ​
    13·2 answers
  • 10. A line passes through the points (-3,8) and
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!