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mote1985 [20]
2 years ago
6

(PLS HELP ) Find the product of (−3y+1)(4y2−y−7).

Mathematics
1 answer:
m_a_m_a [10]2 years ago
8 0

Answer: -12y²+7y²+20y-7

Step-by-step explanation:

Here, we need to use the concept of the FOIL method

  • First Outer Inner Last

----------------------------------------------------------

Given

 (-3y+1)(4y²-y-7)

Expand Parenthesis using FOIL

-12y³+3y²+21y+4y²-y-7

Put like terms together

-12y³+(3y²+4y²)+(21y-y)-7

Combine like terms together

-12y²+7y²+20y-7

Hope this helps!! :)

Please let me know if you have any questions

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The unicycle moves a distance of 251.20cm if the wheel turn once and the wheel must rotate 32 times to cover a distance of 100m

<h3>Circumference of a circle</h3>

The formula for calculating the circumference of a circle is given as:

C = 2pi r

r is the radius of the circle

a) r = 80/2 = 40cm

C = 2(3.14)(40)
C = 251.20 cm

Hence the unicycle moves a distance of 251.20cm if the wheel turn once

b) Number of revolution * 2pi r = distance covered

n * 2(3.14)(50) = 10000
314n = 10000
n = 10000/314

n =32

Hence the wheel must rotate 32 times to cover a distance of 100m

Learn more on circumference here: brainly.com/question/23986334

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