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kenny6666 [7]
3 years ago
8

Factor the expression completely. 28x2 + 20​

Mathematics
1 answer:
lorasvet [3.4K]3 years ago
4 0

Answer:76

Step-by-step explanation:

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What are the zeros of x^3 - 18x^2 +107x -210
trapecia [35]

Answer:

(−7)(−6)(−5) so the zeros are 5, 6, &7

Step-by-step explanation:

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Simplify √63x^15y^9/√7xy^11 Please don’t guess I need to get this right!!
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Answer:

3x^7 / y

Step-by-step explanation:

√63x^15y^9/√7xy^11

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= √9x^14y^-2

= √9x^14 / y^2

= 3x^7 / y

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3 years ago
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5. A blue whale calf swam from Miami, Florida, to Havana, Cuba, a distance of 228 miles, in 12
kow [346]

The average speed is 97346 feet per hour approximately

<em><u>Solution:</u></em>

Given that blue whale calf swam from Miami, Florida, to Havana, Cuba, a distance of 228 miles, in 12  hours 22 minutes

To find: average rate of speed in feet per hour

<u><em>The speed is given by formula:</em></u>

speed = \frac{distance}{time}

From given information,

distance = 228 \text{ miles }

time = 12 \text { hours } 22 \text{ minutes }

We know that,

1 \text{ minute } = \frac{1}{60} \text{ hour}

Therefore,

12 \text { hours } 22 \text{ minutes } = 12 + \frac{22}{60} \text{ hour } = 12.3667 \text{ hour }

Substituting the values in above formula,

\text { speed }=\frac{228}{12.3667}=18.4366

Thus average speed is 18.4366 miles per hour

<em><u>Let us convert to feet per hour</u></em>

We know that,

1 mile = 5280 feet

Therefore,

18.4366 miles = 18.4366 x 5280 feet = 97345.248 feet

Thus average speed is 97346 feet per hour approximately

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