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svlad2 [7]
3 years ago
11

Which binomial must be subtracted from (10r-7) so that the difference of the 2 polynomials is (93r+12)?

Mathematics
1 answer:
babunello [35]3 years ago
6 0

First binomial expression is A = (10r - 7).

Let's assume second binomial expression is B.

and third binomial expression is C = (93r + 12).

According to given question, A - B = C.

To find B, we can subtract C from A such that;

B = A - C

B = (10r - 7) - (93r + 12)

Distributing negative sign and removing parentheses;

B = 10r - 7 - 93r - 12

Combining like terms;

B = (10r - 93r) + (-7 -12)

B = (-83r) + (-19)

B = -83r -19

Hence, second binomial expression would be B = (-83r -19).

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You do the same thing for each of the problems. If you actually want me to just give you the answers, they are:
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The diameter of a circle is 19 feet what is the circumference
alexira [117]

Answer:

The circumference of a circle with a diameter of 19 feet is 59.69

Step-by-step explanation:

Not really an explanation to this.

I hope I helped you, and a "Brainliest" is always appreciated! ☺

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3 years ago
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If f(X) = x^2 + 3x + 5, what is f(a+h)?
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Step-by-step explanation:

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3 years ago
1.) A 20° sector in a circle has an area of 21.5π yd².
a_sh-v [17]

<u>Part 1)</u> A 20° sector in a circle has an area of 21.5π yd².

What is the area of the circle?  

we know that

the area of a circle represent a sector of 360 degrees

so by proportion

\frac{21.5\pi }{20} =\frac{x}{360} \\ \\ x*20=360*21.5\pi \\ \\x=(360*21.5*3.14)/20\\ \\x= 1,215.18\ yd^{2}    

therefore

<u>the answer part 1) is</u>

The area of the circle is 1,215.18\ yd^{2}

<u>Part 2)</u> What is the area of a sector with a central angle of 3π/5 radians and a diameter of 21.2 cm?

we know that

the area of the circle is equal to

A=\pi r^{2}

where

r is the radius of the circle

in this problem we have

Diameter=21.2\ cm\\ r=Diameter/2\\r=21.2/2\\r= 10.6\ cm

<u>Find the area of the circle</u>

A=\pi r^{2}

A=\pi*10.6^{2}

A=352.8104\ cm^{2}

<u>Find the area of the sector</u>

we know that the area of the circle represent a sector of 2\pi radians

by proportion

\frac{352.8104}{2\pi }=\frac{x}{(3\pi/5)} \\\\x*2\pi=(3\pi*352.8104)/5\\ \\x= 105.84\ cm^{2}

therefore

<u>the answer part 2) is</u>

the area of the sector is

105.84\ cm^{2}

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3 years ago
A parking lot is 100 yards long. What is the length of 3/4 of the parking lot, in feet? (Not in words)
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300 feet x 3/4 = 225 feet.

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