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2 years ago

Find a counterexample: Two sides of a

Mathematics

1 answer:

Shkiper50 [21]2 years ago

6 0

Answer: Any isosceles triangle is a counter example. More specifically, a triangle with sides 7, 7 and 3

When forming your triangle, make sure you apply the triangle inequality theorem. This is the idea where adding any two sides leads to a result larger than the third side. So we have

7+7 = 14 which is larger than 3

7+3 = 10 which is larger than 7

By definition, an isosceles triangle has two congruent sides. Some books say "at least 2 congruent sides", but I'll go with the first definition. If you want all three sides to be congruent, then you'd go for the term "equilateral".

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What is the value of the expression below -0.75-(-2/5) + 0.4 + (-3/4) help please!!

Reika [66]

-0.75-(-2/5) + 0.4 + (-3/4)

Simplify it :-)

-0.75 + $\frac{2}{5}$ + 0.4 - $\frac{3}{4}$

Add the like terms / add your decimals with your decimals & your fractions with your fractions.

(-0.75 + 0.4) + ( $\frac{2}{5}$ - $\frac{3}{4}$ )

Simplify :-)

0.35 + ( $\frac{8}{20}$ - $\frac{15}{20}$ )

Simplify :-)

0.35 + (- $\frac{7}{20}$ )

Now you turn your decimal into a fraction.

0.35 = 35/100 = 7/50

NEW PROBLEM : $\frac{7}{50} +$ + $\frac{7}{20}$ = ??

Make both denominators 100.

$\frac{7}{50}$ × $\frac{2}{2}$ = 14 / 100

7/20 × 5/5 = 35/100

NEW PROBLEM : $\frac{14}{100}$ + $\frac{35}{100}$ = $\frac{49}{100}$

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3 years ago

PLEASE HELP ME!!! ILL GIVE THE FIRST PERSON BRAINLIEST!!!

BartSMP [9]

Problem 2

Midpoint: Think 1/2. A midpoint cuts a line segment in 1/2 (in this question). That means that the left segment = the right segment. Remember: midpoint means 1/2.

LN is given as 14.

LM is 1/2 the distance of 14

LM = 1/2 * 14

LM = 7

Problem 3

If the midpoint = the 1/2 way point, the two halves are equal. Remember a midpoint divides the 2 parts into 2 EQUAL parts.

4a - 2 = 18 Add 2 to both sides

4a = 18 + 2

4a = 20

a = 20 /4

a = 5

Problem 4

Remember that midpoint means 1/2. That a midpoint cuts a segment into 2 equal segments

Equation

2n + 2 = 5n - 4

Solve

2n + 2 = 5n - 4 Add 4 to both sides

2n + 2 + 4 = 5n Subtract 2n from both sides.

6 = 5n - 2n

6 = 3n Divide both sides by 3

6/3 = n

n = 2

Answer: B

Problem 5

And again the whole line segment is divided into 2 equal parts.

Equation

6p - 12 = 4p Add 12 to both sides

6p = 12 + 4p Subtract 4p from both sides.

6p - 4p = 12

2p = 12 Divide by 2

p = 12/2

p = 6 <<<<< Answer

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qaws [65]

Answer:

Step-by-step explanation:

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2 years ago

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Sergio039 [100]

Answer:

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Step-by-step explanation:

A probability is the number of desired outcomes divided by the number of total outcomes.

Probability that a sophomore non-Chemistry major

Out of 92 students, 9 are non-chemistry major sophomores. So

$P(A) = \frac{9}{92}$

Then a junior non-Chemistry major are chosen at random.

Now, there are 91 students(1 has been chosen), of which 10 are non-chemistry major juniors. So

$P(B) = \frac{10}{91}$

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0.0108 = 1.08% probability that a sophomore non-Chemistry major and then a junior non-Chemistry major are chosen at random.

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