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nirvana33 [79]
3 years ago
6

Evaluate the expression a^2+6ab for a= -2 and b=4

Mathematics
1 answer:
harkovskaia [24]3 years ago
7 0

Substitute the numbers for letter a and b in the equation

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If a wagon wheel has a diameter of 70cm, how many revolutions would it take to travel 66 METERS?
ddd [48]

Answer:

30 revolutions

Step-by-step explanation:

to calculate the revolution of the wheels in 66 metres we need to get the circumference

circumference = 2πr, r = radius (diameter divided by 2) but from the formula of circumference we ca rewrite it as πd= 3.14 x 70 = 219.8cm

next convert 66 metres to cm

100cm = 1m

x= 66m

cross multiply

x= 66m x100cm/1m= 6600cm

revolutions in 66metres = 6600cm/219.8cm = 30.0272975 ≅30 revolutions

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3 years ago
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marissa [1.9K]
(I'm going to use brackets as my absolute value bars lol)
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[-15]
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50a3b-8ab factor the expression completely. part a: factor out the gcf (5 points) part b: factor the difference of perfect squar
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Answer:

Step-by-step explanation:

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