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3 years ago

Factor 20a + 45.............................................

Mathematics

2 answers:

faust18 [17]3 years ago

7 0

Answer: 5(4a+9)

Step-by-step explanation: 5(4a+9)

20a+45

Delvig [45]3 years ago

3 0

Answer:5(4a+9)

Step-by-step explanation:

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I'm having trouble understanding this Geometry problem.. any help?

Natasha2012 [34]

Answer:

Part 1) $m$

Part 2) $m\ arc\ BD=98\°$

Part 3) $m$

Part 4) $m\ arc\ BF=140\°$

Part 5) $m$

Part 6) $m\ arc\ DF=122\°$

Step-by-step explanation:

we have

$m\ arc\ BFD=262\°$

$m\ arc\ BDF=220\°$

Part 1) Find m<C

we know that

$m$ -----> by central angle

$m\ arc\ BD+m\ arc\ BFD=360\°$ -----> complete circle

$m\ arc\ BD=360\°-m\ arc\ BFD$

$m\ arc\ BD=360\°-262\°=98\°$

$m$

Part 2) Find the measure of arc BD

$m\ arc\ BD=98\°$ -----> see the procedure Part 1)

Part 3) Find m<E

we know that

$m$ -----> by central angle

$m\ arc\ BF+m\ arc\ BDF=360\°$ -----> complete circle

$m\ arc\ BF=360\°-m\ arc\ BDF$

$m\ arc\ BF=360\°-220\°=140\°$

$m$

Part 4) Find the measure of arc BF

$m\ arc\ BF=140\°$ -----> see the procedure Part 3)

Part 5) Find m<G

we know that

$m$ -----> by central angle

$m\ arc\ BF+m\ arc\ BD+m\ arc\ DF=360\°$ -----> complete circle

$140\°+98\°+m\ arc\ DF=360\°$

$m\ arc\ DF=360\°-(140\°+98\°)=122\°$

$m$

Part 6) Find the measure of arc DF

$m\ arc\ DF=122\°$ ----> see the procedure Part 5)

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3 years ago