3 years ago

The diameter of a circle is 2 feet. What is the circle's area?

Mathematics

1 answer:

Serga [27]3 years ago

4 0

A=pi•r•r
A=3.1415•1•1

A=3.1415

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What grade average is 79.2 out of 120

mina [271]

Answer:

66%

Step-by-step explanation:

Divide 79.2 by 120 and multiply by 100

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3 years ago

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Point M is located at (-2,7). If point N is 10 units away from point M, how many possible cordinate pairs

natulia [17]

Answer:

2 possible coordinate pairs

N (8, 17) OR (-12, -3)

Step-by-step explanation:

The rule:

(x, y) => (x + 10, y + 10) OR (x - 10, y -10)

(-2 + 10, 7 + 10) OR (-2 - 10, 7 -10)

(8, 17) OR (-12, -3)

Hope this helps!

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3 years ago

Which of the following number is a rational number?<br> a) 1/4<br> b) 4π<br> c) √3<br> d) √45

lawyer [7]

Answer:

1/4

Step-by-step explanation:

All fractions, both positive and negative, are rational numbers.

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3 years ago

The graphs of f(x) and g(x) are shown below:

rosijanka [135]

<h2>Answer:</h2>

Option: C is the correct answer.

C.) x = −3.8, 3

<h2>Step-by-step explanation:</h2>

The function f(x) is given by:

$f(x)=x^2-x-12$

and the function g(x) is given by:

$g(x)=-1.8x-0.6$

Now, we are asked to find the solution of the equation:

$f(x)=g(x)$

i.e. we have to find the value of x such that both the functions are equal i.e.

$x^2-x-12=-1.8x-0.6\\\\i.e.\\\\x^2-x+1.8x-12+0.6=0\\\\i.e.\\\\x^2+0.8x-11.4=0\\\\i.e.\\\\10x^2+8x-114=0\\\\i.e.\\\\5x^2+4x-57=0$

Now, on solving the equation using the quadratic formula i.e. the solution of the equation:

$ax^2+bx+c=0$

is given by:

$x=\dfrac{-b\pm \sqrt{b^2-4ac}}{2a}$

Here we have:

$a=5,\ b=4\ and\ c=-57$

Hence, the solution is given by:

$x=\dfrac{-4\pm \sqrt{4^2-4\times 5\times (-57)}}{2\times 5}\\\\i.e.\\\\x=\dfrac{-4\pm \sqrt{16+1140}}{10}\\\\i.e.\\\\x=-3.8\ and\ x=3$

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3 years ago

A migrating bird flies 312 miles in 13 hours. How many miles does it fly in 5 hours?

irinina [24]

The answer is 120 miles , because it is a proportion

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3 years ago