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scoundrel [369]
2 years ago
12

Evaluate the expression 7^2/ x^2 - 2 for x = 3

Mathematics
1 answer:
vovikov84 [41]2 years ago
4 0

Answer:

7

Step-by-step explanation:

7²/x²-2 when x=3

49/3²-2

49/9-2

49/7

answer=7

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The population of a town was 25,000 people. then, 3,200 people moved away.. what was the percent decrease?
bogdanovich [222]
It Is B.21.8%, Simple way to figure this out is round B to 20%, If 3200 equals 20% and 20% times 5 equals 100% all you do is multiply 3200 by 5.
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3 years ago
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What is 910÷15 ?
Illusion [34]

Answer:

60.666667

Step-by-step explanation:

8 0
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Find the measure of angle K. ​
atroni [7]

Answer:

m∠K = 97°

Step-by-step explanation:

The sum of the measures of the angles of a quadrilateral is 360

127 + 5x + 3 + 10x + 7 + 88 = 360

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8 0
3 years ago
A cylindrical roller 2.5 m in length, 1.5 m in radius when rolled on a road was found to cover the area of 16500 m2 . How many r
eduard

Answer:

701 revolutions

Step-by-step explanation:

Given: Length= 2.5 m

            Radius= 1.5 m

            Area covered by roller= 16500 m²

Now, finding the Lateral surface area of cylinder to know area covered by roller in one revolution of cylindrical roller.

Remember; Lateral surface area of an object is the measurement of the area of all sides excluding area of base and its top.

Formula; Lateral surface area of cylinder= 2\pi rh

Considering, π= 3.14

⇒ lateral surface area of cylinder= 2\times 3.14\times 1.5\times 2.5

⇒ lateral surface area of cylinder= 23.55 \ m^{2}

∴ Area covered by cylindrical roller in one revolution is 23.55 m²

Next finding total number of revolution to cover 16500 m² area.

Total number of revolution= \frac{16500}{23.55} = 700.6369 \approx 701

Hence, Cyindrical roller make 701 revolution to cover 16500 m² area.

8 0
3 years ago
Eight plus the quotient of a number and 3<br> is −2<br><br> find answer
Fed [463]

Eight plus the quotient of a number and 3  is −2

8 + (x/3) = - 2

Hope it helps

8 0
3 years ago
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