3 years ago

Answer the question please

Mathematics

2 answers:

Papessa [141]3 years ago

7 0

Answer:

I believe it is 9ft

Step-by-step explanation:

elena55 [62]3 years ago

5 0

I’m pretty sure the answer is C but I might be mistaken

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What is y=x+2. I need help fast please help

Mademuasel [1]

Answer:

Step-by-step explanation:

Its is a linear equation .that is to day a simple equation of a line whose values can be obtained through their intercept.intercept on x axis, y is zero and vice versa

7 0

3 years ago

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.