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Sergeeva-Olga [200]

3 years ago

10

Please help!!!! i really need to get this done

2 answers:

Alona [7]3 years ago

8 0

You’re answer is 142

mr_godi [17]3 years ago

3 0

Answer:

142°

Step-by-step explanation:

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What is the slope of the line through (-4.2) and (3,-3)?

Dennis_Churaev [7]

Finding the slope using the two points:

The formula for slope is

$\frac{y_{2}-y_{1}}{x_{2}-x_{1}}$

In this case...

$y_{2} =-3\\y_{1} =2\\x_{2} =3\\x_{1} =-4$

^^^Plug these numbers into the formula for slope...

$\frac{-3-2}{3 - (-4)}$

$\frac{-5}{7}$

^^^This is your slope

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3 0

4 years ago

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Maggie want to buy several display boxes that hold 8 rocks each. She has $35 to spend. How many display boxes can she buy? Write

Roman55 [17]

35÷8=4.375 or u could just put 4 but the real answer is 4.375

7 0

3 years ago

Find the slope of the line through each pair of points.<br> (1,8). (-5,3)

Helga [31]

Answer:

5/6

Step-by-step explanation:

I used my graphing calculator, but you can use the equation y-y/x-x.

8 0

3 years ago

Ebonae fish tank holds 40 gallons.how many quarts does the fish tank hold?

Rudik [331]

The fish tank that ebonae can hold up to 160 quarts of water

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5 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.

8 0

4 years ago