courtneykelley5 courtneykelley5

23-09-2019
Mathematics

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The product of 7 and a number is at least 30

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harpazo harpazo

23-09-2019

Let x be the number multiplied by 7.

We get 7x.

At least 30 means GREATER THAN OR EQUAL TO 30 or ⩾ 30.

Put it all together now.

7x ⩾ 30

Divide both sides by 7.

x ⩾ 30/7

Done!

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