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3 years ago

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According to this lesson, how many ice ages have occurred? A. 2 B. 3 C. 4 D. 1

2 answers:

earnstyle [38]3 years ago

6 0

Hello!

There have been 5 (major) ice ages. Names: (Huronian, Cryogenian, Andean-Saharan, Karoo Ice Age, and Quaternary glaciation.) How much does it mention?

Hope l helped!

kipiarov [429]3 years ago

5 0

I believe it is C. 4
I agree with Y∅U (sorry if I spelled it wrong), there have been 5 but in the book I used for this same question, it only listed 4.
So my final answer would be C. 4
P.S. I got the same answer correct on a test from K12.

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3 years ago

You and your friend each collect rocks and fossils. Your friend collects three times as many rocks and half as many fossils as y

tino4ka555 [31]

Answer:

Number of rocks and fossils collected by you is 1 and 24 respectively

Number of rocks and fossils collected by your friend is 3 and 12 respectively

Step-by-step explanation:

Let the number of Rocks you collect be x

Let the number of Fossils you collect be y

Then the total number pf objects you collected will be

x + y = 25

x = 25 - y------------------------------(1)

Your friend collects three times as many rocks and half as many fossils as you.

This can be written as

$3x + y(\frac{1}{2}) = 15$

$3x + (\frac{y}{2}) = 15$ -------------------(2)

Substituting (1) in (2)

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$75 - 3y + (\frac{y}{2}) = 15$

Grouping the like terms we get,

$75 - 15 = 3y - (\frac{y}{2})$

$60= \frac{6y-y}{2})$

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4 years ago

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Step-by-step explanation:

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3 years ago

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Darina [25.2K]

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So, the solution to the quadratic equation is given by:

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