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3 years ago

Does anyone know how to do these? I'm having a hard time and you guys are very helpful.

Mathematics

2 answers:

Keith_Richards [23]3 years ago

6 0

4z - 1 ( for now skip the z part) = 3z.

3z times 2 = 6z

Now on the other side, add the 3 outside of the parentheses to the 2 on the inside... you'll get 5 + z

To make each side equal... 5 + ? = 6

Obviously 1... So z = 1

n200080 [17]3 years ago

4 0

Ok so keep in mind, we are solving for x or z. We want to get it by itself.

So, with 6x= 5x+22, we need to subtract 5x from both sides of the = sign

So 6x - 5x = 1x.

Our new equation looks like 1x= 22

We still don't have x alone so we need to divide one on both sides of the =

Our new and final answer is x=22

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2 years ago

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Using the speed - distance relationship, the time left before the appointed time is 27 minutes.

Recall :

Distance = speed × time

Let time = t

At 10mph :

Distance = 10 × (t + 3) = 10t + 30 - - - (1)

At 12 mph :

Distance = 12 × (t - 2) = 12t - 24 - - - - (2)

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Learn more : brainly.com/question/25669152

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