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OlgaM077 [116]
3 years ago
6

the average speed of a race car is 240 km/h. if the race is 200 laps long with each lap being 4.02 km, how long will the race la

st if there are no wrecks, rain delays, or debris on the track?
Mathematics
1 answer:
shtirl [24]3 years ago
7 0
Each lap = 4.02 km
 200 laps x 4.02 = 804 km total

804 km / 240 km/h = 3.35 hours = 3 hours and 21 minutes

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In a newspaper, it was reported that the number of yearly robberies in Springfield in 2013 was 125, and then went down by 12% in
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Answer:

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Step-by-step explanation:

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Riley makes a mistake in step 2 while doing her homework. what was her mistake? startfraction x over x squared minus 5 x 6 endfr
maw [93]

The mathematical mistake that Riley made is that:
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<h3>What is a Common Denominator?</h3>

A common denominator is a factor that is similar to all the fractions in the sequence of equations.

Hence the correct answer is:

(2(2x² - 6x + 9))/((x-3) (x-2) (x+3))

See the correct sequence of steps below:

Step One - the Expression is given as:

(x/(x-3)(x-2)) + (3/(x+3))

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Hence we have:  (x (x+3) + 3(x-3) (x-2))/(x-3)(x-2)(x+3)

Step 3  Apply the Law of Multiplicative Distribution:

Hence we have  (x² +3x+3x²-9x-6x+16)/(x-3)(x-2)(x+3)

Step 4 -  Collect Like Items

This gives us: (x²+3x²)+(3x-9x-6x)+18/(x-3)(x-2)(x+3)

Step 5 Sort for like coefficients

This gives us:  ((1+3)x² +(3-9-6) * x + 18)/(x-3)(x-2)(x+3)

Step 6 -  check for the sum or difference

This gives us: (4x²+(3-9-6) * x+ 18)/(x-3)(x-2)(x+3)

We simplify and factor the expression to get

(2(2x²-6x+6)/(x-3)(x-2)(x+3).

See the attached for full question.

Learn more about Common Denominators at:

brainly.com/question/542317

4 0
2 years ago
A middle school took all of its 6th grade students on a field trip to see a symphony. The students filled 855 seats, which was 4
Alex

Answer:

1900

Step-by-step explanation:

let a = total seats

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0.45 x a = 855

divide both sides by 0.45

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7 0
3 years ago
HELP PLS ASAP I WILL AWARD BRAINLIEST!!!
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Answer:

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Step-by-step explanation:

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