What was the name of the period where most of the united states was covered with ice?

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The Pleistocene Epoch is typically defined as the time period that began about 2.6 million years ago and lasted until about 11,700 years ago. The most recent Ice Age occurred then, as glaciers covered huge parts of the planet Earth.

Pleistocene Epoch

Step-by-step explanation:

The Pleistocene Epoch is a time period that began around 2.6 million years ago and ended roughly 11,700 years ago. Glaciers covered vast swaths of the planet Earth during the most recent Ice Age.

To solve this we need to do PEMDAS

# Parenthesis

# Exponents

# Multiplication

# Division

# Addition

# Subtraction

First we need to do parenthesis so -7 x X + -7 x 9
-7(x) = -7x and -7(9) = -63

So now our problem is reduced to
-7x - 63 + 72 = 12 - 8x

Now we need to simplify the -63 and +72 into one number so 72 - 63 = 9

Our problem now is -7x + 9 = 12 - 8x

Now we need to move the constants to one side so we can subtract 9 from both sides to move it to the right side

-7x = 12 - 8x - 9

We need to simplify the 12 and -9 into 12 - 9 = 3

Now we have -7x = -8x + 3

Now we move the variables to the left to add 8x to both sides and -7 + 8 = 1

x = 3



Simple work;

-7(x+9) + 72 = 12 - 8x
-7x -63 + 72 = 12 - 8x
-7x + 9 = 12 - 8x
-7x = 12 -8x - 9
-7x = -8x + 3
x = 3

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