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3 years ago

Determine whether the quantitative variable is discrete or continuous. number of lightning strikes in a city in one year'

Mathematics

2 answers:

kenny6666 [7]3 years ago

8 0

The number of lightning strikes will be a whole number

Therefore it is a discrete variable

algol133 years ago

4 0

That quantitative variable is discrete because you only get one answer when your figuring out how many lightning strikes in a city in one year.

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The line of symmetry for the quadratic equation y = ax2 - 2x - 3 is x = 1. What is the value of "a"?

timama [110]

Y = a(x - h)² + k • (h, k) is the vertex • x = h is line of symmetry so y = ax² - 2x - 3 y/a = x² - 2/ax - 3/a y/a + 3/a = x² - 2/ax y/a + 4/a= x² - 2/ax + (-1/a)² ← completing the square y/a + 4/a= (x - 1/a)² y/a = (x - 1/a)² - 4/a y = a(x - 1/a)² - 4 so since you've been given h = 1 then 1/a = 1 and so a = 1

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3 years ago

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Convert: 115 inches to<br> yards and inches

Ulleksa [173]

Answer: 3.19444 or 3.19 yards both of them are same.

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4 years ago

I need help with this answer ASAP I do t know how to do it?

asambeis [7]

Answer:

22/3 i believe

Step-by-step explanation:

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3 years ago

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Will give brainliest, please help fast

Gekata [30.6K]

Answer:

Converting the equation $x^2-20x+13=0$ into completing the square method we get: $\mathbf{(x-10)^2=87}$

Step-by-step explanation:

we are given quadratic equation: $x^2-20x+13=0$

And we need to convert it into completing the square method.

Completing the square method is of form: $a^2-2ab+b^2=(a-b)^2$

Looking at the given equation $x^2-20x+13=0$

We have a = x

then we have middle term 20x that can be written in form of 2ab So, we have a=x and b=? Multiplying 10 with 2 we get 20 so, we can say that b = 20

So, 20x in form of 2ab can be written as: 2(x)(10)

So, we need to add and subtract (10)^2 on both sides

$x^2-20x+13=0\\x^2-2(x)(10)+(10)^2-(10)^2+13=0\\(x^2-2(x)(10)+(10)^2) \:can\: be\: written\: as\: (x-10)^2 \\(x-10)^2-100+13=0\\(x-10)^2-87=0\\(x-10)^2=87$

So, converting the equation $x^2-20x+13=0$ into completing the square method we get: $\mathbf{(x-10)^2=87}$

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3 years ago

the area of Alaska is 586400 square miles the area of the Philippines is 114000 square miles how many square miles is the area o

olya-2409 [2.1K]

Multiply 586400 by 11400

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4 years ago

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