3 years ago

What is x squared plus y squared equals nine

Mathematics

1 answer:

KonstantinChe [14]3 years ago

4 0

$x^2+y^2=9\\\\it's\ a\ circle\\\\center:(0;\ 0)\\\\radius:r=\sqrt9=3\\\\look\ at\ the\ picture$

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A surveyor is 305 ft from the base of the new courthouse. Her angle-measuring device is 5 ft above the ground. The angle of elev

Charra [1.4K]

Answer:

279.62 feet

Step-by-step explanation:

We have a rectangle with 5ft x 305ft sides representing the area between your device and the base of the courthouse.

In addition to this we have an angle of 42 °

The height would come being the length of the opposite side of this triangle.

We know that:

tan (° A) = opposite / adjacent

Adjacent side is 305 ft and ° A is 42 °

Solved for opposite:

Opposite = adjacent * tan (° A)

Opposite = 305 * tan (42) = 274.62 feet

We must add 5 feet to this result and we are left with:

274.62 + 5 = 279.62

It means that the height is 279.62 feet

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3 years ago

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MissTica

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The total yards of fence (119.5) / the amount of fence Jamie can paint per hour (4.78) = 25.

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3 years ago

If f(x)=|3x-4|+2 find f(-10)

Nat2105 [25]

Answer:

$f(-10)=36$

Step-by-step explanation:

$f(x)=|3x-4|+2\\f(-10)=|3(-10)-4|+2\\f(-10)=|-30-4|+2\\f(-10)=|-34|+2\\f(-10)=34+2\\f(-10)=36$

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3 years ago

Translate the following:<br> "twice the sum of a number and three is eighteen"

Scorpion4ik [409]

Answer:

7.5

Step-by-step explanation:

how i figured it is 18-3 is 15

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z=7.5

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Answer:

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Step-by-step explanation:

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3 years ago