2 years ago

If DE is not parallel to BC, what is DE?

Mathematics

1 answer:

stiks02 [169]2 years ago

4 0

They are corresponding angles

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Prove that if a and b are positive integers whose sum is a prime p, their greatest common divisor is 1.

Tasya [4]

Proof by contadiction.

Let assume there exist such positive integers $a$ and $b$ whose sum is a prime number $p$ , that their greatest common divisor is greater than 1.

$a,b\in\mathbb{Z^+}\\d=\text{gcd}(a,b)>1\\\\a=de\\b=df\\e,f\in\mathbb{Z^+}\\\\a+b=p\\de+df=p\\d(e+f)=p\\$

Since $p$ is a prime number and $d>1$ , then $d=p \wedge e+f=1$ , but we assumed earlier that $e,f\in\mathbb{Z^+}$ , and there are no two positive integers that sum up to 1.

q.e.d.

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3 years ago

Write 640 : 30 in the lowest form.

OLga [1]

Answer:

should be 64:3

Step-by-step explanation:

divide by 10

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2 years ago

How to simplify this equation

Ainat [17]

6square root of 3 (numerator) over÷ square root of 3 and square root of 3. Then you get 6 square root of 3 over ÷ 3=2 square root of 3.
Take time mate) Good day.

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3 years ago

Please need help I will be MARKING as BRIANILIST. thank you so much.

dlinn [17]

Answer:

C. Multiply 3 by 18

Step-by-step explanation:

Susan reads:

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3 years ago

Read 2 more answers

Please explain how you got your answer also. A class has 21 girls and 12 boys. What is the probability that a boy's name is draw

Tresset [83]

It’s the answer 12 over 33

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3 years ago