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3 years ago

Please answer. Will mark brainli

Mathematics

1 answer:

Pepsi [2]3 years ago

4 0

Answer:

Answers is 66 ft^2

Step-by-step explanation:

Because 5 x 12 = 60 and 2 x 3= 6, then 6+60 =66

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a biker must circle a 12 mile track twice. His average speed must be 60mph. On his first lap he averaged 50 mph. How fast must h

liq [111]

Answer:

75 mph

Step-by-step explanation:

A biker must circle a 12-mile track twice. His average speed must be 60 mph.

So, the average time required to cover the distance is $\frac{2 \times 12}{60} = 0.4$ hours.

Now, on his first lap, he averaged 50 mph.

So, he covered this 12 miles track in $\frac{12}{50} = 0.24$ hours.

Hence, he has to cover the next 12 miles track in (0.4 - 0.24) = 0.16 hours.

Therefore, his average speed in the second round must be $\frac{12}{0.16} = 75$ mph to qualify. (Answer)

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3 years ago

Josie reads the same number of pages each day in her 200-page book.

Nookie1986 [14]

200÷P, as you need to to do the equivalent of 20-p-p-p... until you get to 0, which is faster and more simply done with division.

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3 years ago

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I really need help with this statistical/variable question, i am really struggling and would mean alot if someone could answerr

inna [77]

Answer:

Step-by-step explanation:

1) quantitative

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3)neither

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3 years ago

How are yall day going?

Monica [59]

Answer:

mine's going great :)

Step-by-step explanation:

how's ur day? (just here for free points)

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3 years ago

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0/1 Solve the equation by completing the square. Round your answer to the nearest hundredth, if necessary x^2+18x=7

11111nata11111 [884]

Answer:

The solution to the equation is x = 0.38 or -18.38

Step-by-step explanation:

x^2+18x=7 can be properly written as

$x^{2} +18x =7$

To solve by completing the square, divide the coefficient of x by 2, square and then add to both sides

i.e 18/2 = 9

Then add 9² to both sides of the equation

$x^{2} +18x + 9^{2} = 7 + 9^{2}$

This becomes

$(x+9)^{2} = 7 + 81$

$(x+9)^{2} = 88$

$x+9 = \pm \sqrt{88}$

$x = -9 \pm\sqrt{88}$

$x = -9 \pm 9.38$

∴ $x = -9+9.38 or -9-9.38$

$x = 0.38 or -18.38$

Hence, x = 0.38 or -18.38

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3 years ago