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3 years ago

What would (10x^2+8xy-20)-(2x^2+3xy+5) equal??

Mathematics

1 answer:

SSSSS [86.1K]3 years ago

5 0

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Answer:

2(5g+3h+4)

10g+6h+8

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2 years ago

What’s A third of a number 9

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which of the following is the algebraic expression that best describes the sequence 3, 9, 27, 81, 243,...?

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${3}^{n}$

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3 years ago

Suppose z is proportional to the square root of x. If z = 717 when x = 9, find the proportionality constant k.??

Dahasolnce [82]

Answer:

239

Step-by-step explanation:

Write the equation. Fill in the given values, and solve for the unknown,

z = k√x

717 = k√9

k = 717/3 = 239

The constant of proportionality is 239.

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2 years ago

Read 2 more answers

Please help with this arc equation.

boyakko [2]

Answer:

Part 1) $arc\ AB=49^o$

Part 2) $arc\ ABC=204^o$

Part 3) $arc\ BAC=156^o$

Part 4) $arc\ ACB=311^o$

Step-by-step explanation:

Part 1) Find the measure of arc AB

we know that

$arc\ AB=m\angle AOB$ ----> by central angle

we have

$m\angle AOB=49^o$

therefore

$arc\ AB=49^o$

Part 2) Find the measure of arc ABC

we know that

The central angle of complete circle is equal to 360 degrees

$arc\ ABC=360^o-107^o-49^o=204^o$

Part 3) Find the measure of arc BAC

we know that

$arc\ BAC=arc\ BA+arc\ AC$ ----> by angle addition postulate

we have

$arc\ BA=49^o$ ---> by central angle

$arc\ AC=107^o$ ---> by central angle

$arc\ BAC=49^o+107^o=156^o$

Part 4) Find the measure of arc ACB

we know that

The central angle of complete circle is equal to 360 degrees

$arc\ ACB=360^o-arc\ AB$

substitute

$arc\ ACB=360^o-49^o=311^o$

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3 years ago