3 years ago

I need help to get the answer,

Mathematics

2 answers:

Vikki [24]3 years ago

8 0

Answer:

4.25 hours

Step-by-step explanation:

A fully charged phone would be at 100%, so we'll set y equal to 100 and solve for x:

100=20x+15

85=20x

4.25=x

So Sammi's phone will be fully charged in 4.25 hours.

Nimfa-mama [501]3 years ago

3 0

Answer:

4.25 hours

Step-by-step explanation:

"Fully charged" means the percentage should be 100%.

Substitute 100 for y then solve for x.

$100=20x+15\\85=20x\\x=\frac{85}{20}\\x=4.25 \text{ hours}$

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