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Alona [7]
3 years ago
15

Area of a semicircle with radius of 6

Mathematics
2 answers:
Virty [35]3 years ago
4 0
6 times 2 times pi divided by 2 = 18.8495559215
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Sphinxa [80]3 years ago
3 0

Khan academy answer is 4.5 pie symbol

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Harvey walks 45 feet in 8.5 seconds. What is Harvey's rate in feet per<br> second?
lilavasa [31]

The answer is : 5.29411764706

The answer when rounded:  5.29 or 5.3

I found the answer by simply dividing 45/8.5 - Remember that per means division!

6 0
2 years ago
If a line with a slope of -2 crosses the y-axis at (0,3). What is the equation of the line?
baherus [9]
It technically would be y=3x-3 in the y=mx+b formula, but it could also be rewritten 3x-y=3. Hope this helps!
3 0
3 years ago
Can somebody please help (no websites)
const2013 [10]

Answer:

x   y

0  .75

3  3.75

9  9.75

Step-by-step explanation:

You add .75 to whatever number x equals, to get y.

Hope that this helps!

4 0
2 years ago
What much expression represents a rational number?
Pie

Answer:

\displaystyle \frac{2}{7}+\sqrt{121}

Step-by-step explanation:

<u>Rational Numbers</u>

A rational number is any number that can be expressed as a fraction

\displaystyle \frac{a}{b}, \ b\neq 0

for a and b any integer and b different from 0.

As a consequence, any number that cannot be expressed as a fraction or rational number is defined as an Irrational number.

Let's analyze each one of the given options

\displaystyle \frac{5}{9}+\sqrt{18}

The first part of the number is indeed a rational number, but the second part is a square root whose result cannot be expressed as a rational, thus the number is not rational

\pi + \sqrt{16}

The second part is an exact square root (resulting 4) but the first part is a known irrational number called pi. It's not possible to express pi as a fraction, thus the number is irrational

\displaystyle \frac{2}{7}+\sqrt{121}

The square root of 121 is 11. It makes the whole number a sum of a rational number plus an integer, thus the given number is rational

\displaystyle \frac{3}{10}+\sqrt{11}

As with the first number, the square root is not exact. The sum of a rational number plus an irrational number gives an irrational number.

Correct option:

\boxed{\displaystyle \frac{2}{7}+\sqrt{121}}

6 0
3 years ago
If set D is not the empty set but is a subset of set E, then which of the following is true?
MrRa [10]
D∩E=D This is because since D is a subset of E then the elements they will have in common are the elements in D and D is not a null set
3 0
3 years ago
Read 2 more answers
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