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3 years ago

14

Given l(-4,3) and m(-7,-2), what's the length of lm

1 answer:

Sergeeva-Olga [200]3 years ago

3 0

Distance = Square Root ( (X difference)^2<span> + (Y difference)^</span>2<span> )
</span>
Distance = Square Root ( (-4 --7)^2 + ( 3 --2)^2<span> )

</span>Distance = Square Root (3^2 + 5^2)

<span>Distance = Square Root (9 + 25)

Distance = </span><span>Square Root (34)

Distance = </span><span>5.8309518948

Therefore the length of lm equals </span> <span> <span> <span> 5.8309518948 </span> </span> </span>

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Does anyone know if this is correct or how to do this? (part a,b, and c)

stepladder [879]

Part A you would use 200-L ( since you have 400 feet total 200 feet would equal length plus width)

Part B 200 - 80 = 120

Part C 200-90 = 110

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3 years ago

What is the sum of 12 – 5i and –3 + 4i?<br> –16 + 63i <br>9 – i <br>9 – 9i <br>15 – 9i

Svetach [21]

Answer:

$\boxed{ \bold{ \huge{ \boxed{ \sf{9 - i}}}}}$

Step-by-step explanation:

$\sf{12 - 5i + ( - 3 + 4i)}$

When there is a ( + ) in front of an expression in parentheses, there is no need to change the sign of each term. That means, the expression remains the same. Just remove the parentheses

$\longrightarrow{ \sf{12 - 5i - 3 + 4i}}$

Collect like terms

$\longrightarrow{ \sf{ 12 - 3 - 5i + 4i}}$

Subtract 3 from 12

$\longrightarrow{ \sf{9 - 5i + 4i}}$

Collect like terms

$\longrightarrow{ \sf{9 - i}}$

Hope I helped!

Best regards! :D

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3 years ago

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Find the center of the circle whose equation is x² + y² = 4.

Varvara68 [4.7K]

Answer:

The center of circle is $(0,0)$

Step-by-step explanation:

We need to find the center of the circle of the equation $x^{2}+y^{2}=4$

Since, the general equation of circle is $(x-h)^{2}+(y-k)^{2} = r^{2}$

Where (h,k) is center of circle and r is radius.

Re-write the circle equation is $x^{2}+y^{2}=4$ as,

$x^{2}+y^{2}=2^{2}$

Compare $x^{2}+y^{2}=2^{2}$ with $(x-h)^{2}+(y-k)^{2} = r^{2}$

so, $(x-0)^{2}+(y-0)^{2} = 2^{2}$

Hence, the center of circle is $(0,0)$

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Answer:

80 %

Step-by-step explanation:

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MrRa [10]

Answer:24/34

Step-by-step explanation:

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4 years ago

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