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3 years ago

Help help help plz help answer this questioonnnn

Mathematics

2 answers:

elena55 [62]3 years ago

8 0

Answer:

its the last one y=1/2 x - 4

Llana [10]3 years ago

7 0

Answer:

Step-by-step explanation:

goodluck!

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It's really hard for me to understand what they are asking.

Gekata [30.6K]

Answer:

B is the correct answer

Step-by-step explanation:

Angles 1, 2, and 3 added together should make 180 degrees.

So, if angle 2 is 70 degrees, you subtract 70 from 180 (180-70=110) and you're left with 110 degrees.

Angle 1 and 3 add together should make 110 degrees which makes B the only true statement.

3 0

3 years ago

No links, downloads, or anything of the sort. I will give brainliest!!!

TiliK225 [7]

Answer:

The answer is D

Step-by-step explanation:

5 0

3 years ago

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I don’t understand this at all

Lesechka [4]

Step-by-step explanation:

I dont either tbh

6 0

3 years ago

Prove that root 7 is irrational by the method of contradiction

Alchen [17]

Let assume that $\sqrt7$ is a rational number. Therefore it can be expressed as a fraction $\dfrac{a}{b}$ where $a,b\in\mathbb{Z}$ and $\text{gcd}(a,b)=1$ .

$\sqrt7=\dfrac{a}{b}\\\\7=\dfrac{a^2}{b^2}\\\\a^2=7b^2$

This means that $a^2$ is divisible by 7, and therefore also $a$ is divisible by 7.

So, $a=7k$ where $k\in\mathbb{Z}$

$(7k)^2=7b^2\\\\49k^2=7b^2\\\\7k^2=b^2$

Analogically to $a^2=7b^2$ ------- $b^2$ is divisible by 7 and therefore so is $b$ .

But if both numbers $a$ and $b$ are divisible by 7, then $\text{gcd}(a,b)=7$ which contradicts our earlier assumption that $\text{gcd}(a,b)=1$ .

Therefore $\sqrt7$ is an irrational number.

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3 years ago

When the side of a square is decreased in length by 1 foot, its area is 8 ft2. The length of a side of the square is 1 + 2.

NemiM [27]

Answer:TRUE

Step-by-step explanation:

6 0

3 years ago