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3 years ago

PLEASE HELP WITH BOTH WILL CROWN BRAINLIEST !!!

Mathematics

1 answer:

jekas [21]3 years ago

7 0

23)
the ring has a radius of 6mm and is 2 mm wide, so it has an outer ring at 7mm and an inner one at 5mm
to get the area subtract the inner ring from the outer, because of the hole:
outer=7²*π=49π
inner=5²*π=25π
ring area=outer-inner=49π-25π=24π= option C

24)circumference of a circle is c=2rπ

for the larger one: 2*20*π=40π
smaller one:2*15*π=30π

distance the larger wheel moves in 30 revolutions:
circumference*30=40π*30=120 π

revolutions of the smaller wheel by dividing the distance with the circumference:
120π/30π=40 revolutions=option H

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Hello from MrBillDoesMath!

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3 years ago

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3 years ago

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frosja888 [35]

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3 years ago

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telo118 [61]

Answer:

Solution: (2, 2)

Step-by-step explanation:

The first equation describes a line with a y-intercept of 3 and a (downward) slope of -1/2. That is, it has a "rise" of -1 for a "run" of 2.

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