3 years ago

Explain how to calculate the radius of a circle if you know its diameter.

Mathematics

1 answer:

Marianna [84]3 years ago

4 0

Answer:

r=d÷2 is the right answer

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What is the solution to the system of equations? <br> 5x-3y=-9 <br> 2x-5y=4<br><br> (___,___)

djverab [1.8K]

$\left \{ {{5x-3y=-9\ \ | *(-2)} \atop {2x-5y=4\ \ | *5}} \right. \\\\ \left \{ {{-10x+6y=18} \atop {10x-25y=20}} \right. \\\\+---\\addition\ method\\\\
-19y=38\ \ \ | divide\ by\ -19\\
y=-2\\\\2x=4+5y\ \ \ | divide\ by\ 2\\\\
x=\frac{4+5y}{2}=\frac{4+5*(-2)}{2}=\frac{4-10}{2}=\frac{-6}{2}=-3\\\\Solution:\\ \left \{ {{y=-2} \atop {x=-3}} \right.$

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3 years ago

In 2006, 5,200 highway accidents were recorded in a city. The number of highway accidents increases by 5% every year. Let y repr

NikAS [45]

Answer:

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Step-by-step explanation:

Since the accidents increase by 5% this represents that the number is increasing exponentially . So the sequence is geometric sequence. The geometric sequence can be represented by: a, ar, ar^2, ar^3...

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icang [17]

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Step-by-step explanation:

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